Across International

<h2>What are Welch vacuum pumps?</h2>
&nbsp;
Across International is an American laboratory vacuum pump brand offering oil-free diaphragm and corrosion-resistant pumps for routine laboratory vacuum applications. Its specialized series is the flagship line, designed for chemical resistance and reliable performance in standard lab workflows.
&nbsp;
<h2>What you will find: </h2>
&nbsp;
<ul>
<li data-path-to-node="1,0,0">Corrosion-resistant, two-stage belt-driven systems specifically engineered to handle aggressive chemical vapors and highly corrosive gases.</li>
<li data-path-to-node="1,1,0">Heavy-duty vacuum systems equipped with explosion-proof motors to ensure safe operation in hazardous environments containing flammable vapors.</li>
<li data-path-to-node="1,2,0">Fully chemical-resistant, four-head diaphragm configurations designed to provide high-flow, oil-free vacuum performance for harsh solvent evaporations.</li>
<li data-path-to-node="1,3,0">Rugged, dual-stage oil-sealed pumps utilizing a reliable belt-drive mechanism to deliver deep, stable high-vacuum levels.</li>
<li data-path-to-node="1,4,0">Original equipment service kits packed with essential replacement parts to maintain optimum sealing and extend diaphragm operational life.</li>
<li data-path-to-node="1,5,0">Air-cooled diffusion systems engineered to boost vacuum throughput and achieve ultra-high vacuum ranges for specialized industrial or physics applications.</li>
<li data-path-to-node="1,6,0">Two-head, oil-free chemical duty pumps utilizing advanced dry technology to ensure clean, low-maintenance laboratory vacuums.</li>
</ul>
&nbsp;
<h2>How to choose a Welch vacuum pump</h2>
&nbsp;
Choose the Dryfast ULTRA series for oil-free chemical vacuum
The Dryfast ULTRA series provides PTFE-wetted, oil-free vacuum pumps suitable for routine chemistry and biology applications. Single-stage models are used for filtration, while two-stage models support deeper vacuum for rotary evaporation and concentration.
Choose the CRV Pro series for aggressive chemical resistance
The CRV Pro series is designed for highly corrosive environments, including strong acids and halogenated solvents, offering enhanced material resistance compared with standard diaphragm pump construction.
Confirm ultimate vacuum requirements
Single-stage Welch pumps typically reach ~50&ndash;100 mbar for filtration, while two-stage models achieve ~3&ndash;7 mbar for rotary evaporation and SpeedVac applications. Model selection should match the required vacuum level.
Consider control requirements
Most Welch pumps are used as standalone systems, but they can also be paired with external vacuum controllers for set-point regulation when more precise control is required.
Check noise and installation requirements
Noise levels vary by model, so specifications should be reviewed for bench placement or enclosed operation. Exhaust routing and ventilation should also be considered during setup.
&nbsp;
<h2>Specifications context</h2>
&nbsp;
Welch Dryfast pumps are designed for continuous operation with thermal protection that shuts down the motor under overheating conditions and restarts after cooling. They are widely used in North American laboratories due to their balance of cost, reliability, and chemical resistance.
As of 2026, Welch Dryfast ULTRA pumps remain a standard choice for oil-free diaphragm vacuum applications in research and analytical labs.
The MBP team is here to help&mdash;<a href="https://mbpinc.net/contact-us">reach out today for a personalized quote</a>.

Welch Pumps

KF-50 Clamp and Centering Ring (Mounted On Unit)

KF-25 Clamp and Centering Ring (Mounted On Unit)

Welch ProBoost Air-Cooled Diffusion Pump Standard Package

Welch ProBoost Air-Cooled Diffusion Pump

The Welch ProBoost is an air-cooled gas jet (diffusion) pump designed for high-vacuum applications. It operates without internal moving parts, using boiling silicone vapors to create a gas jet. Backed by a rotary vane pump, ProBoost can achieve vacuum pressures as low as 0.00002 torr, significantly improving reaction results with air-sensitive compounds like organometallics and hydrides. It features a built-in control board for the fan and heater, ensuring efficient cooling after operation.\n\n\n\n

Model

 Electrical requirements

Ultimate vacuum pressure

Minimum back pump FAD at 60Hz

Maximum discharge pressure

Ambient environment temp

Heat-up time

Cool down time

Silicone oil capacity

Inlet connection

Discharge connection

Unit weight

Manufacturer

Accessories

<h2>What Are Laboratory Freezer Accessories?</h2>
&nbsp;
Laboratory freezer accessories fall into four functional groups: organizational hardware that maximizes storage density and sample accessibility; temperature monitoring and alarming systems that protect sample integrity and support compliance; backup protection systems that guard against temperature excursions during power failures; and containment and labeling consumables that prevent sample misidentification and physical damage. Effective freezer accessory selection increases the number of samples stored per unit volume, reduces the time the freezer door is held open during access (directly protecting sample stability), and provides the electronic audit trail required by regulatory frameworks, including CAP, CLIA, GxP, and FDA 21 CFR Part 11. Match accessories to the freezer temperature, sample tube format, and regulatory compliance framework applicable to your laboratory.
&nbsp;
<h2 dir="ltr">What You Will Find:</h2>
&nbsp;
<ul>
<li dir="ltr" aria-level="1">
Storage Boxes &amp; SST Drawers: High-quality stainless steel drawer sets and storage boxes specifically designed to maximize space and organization within upright and stackable ULT freezers.
</li>
<li dir="ltr" aria-level="1">
CO2 Backup Systems: Critical emergency backup solutions for ultra-low freezers that safeguard your inventory against sample loss during power outages or mechanical failures.
</li>
<li dir="ltr" aria-level="1">
Insulated Shipping Cubes: Advanced VIP insulated containers engineered for the secure and temperature-stable transport of high-value biological materials.
</li>
<li dir="ltr" aria-level="1">
Specialized Inventory Tools: Custom-fit shelving and racking solutions that ensure unrestricted airflow and easy access to your most important specimens.
</li>
</ul>
&nbsp;
<h2>How to Choose Freezer Accessories</h2>
&nbsp;
Freezer racks and storage boxes
Standardized upright freezer racks hold stacked sample storage boxes in fixed positions within the cabinet, enabling systematic sample organization and reducing search time during access. Standard 2-inch (5 cm) sample boxes are the most common format and fit racks in most upright and chest ULT freezers; 3-inch (7.5 cm) boxes store fewer boxes per rack but hold more tubes per box. Rack configurations include fixed upright racks (anchored to cabinet floor or wire shelf), side-access sliding drawer racks (pulled out horizontally for access without removing the whole rack), and adjustable racks for non-standard box sizes. Confirm rack dimensions against the freezer cabinet's internal width, depth, and shelf spacing before ordering.
Sample storage boxes and dividers
Cryogenic sample storage boxes (cryoboxes) are fabricated from cardboard (economy, single-use), high-density polyethylene (HDPE, reusable), polypropylene (PP, autoclavable), or stainless steel (autoclavable, chemically resistant) and hold 9x9 (81 positions), 10x10 (100 positions), or 8x8 (64 positions) tubes per box. Insert dividers (indexed alphanumerically) to create individual tube compartments to prevent tube movement, mixing, and label abrasion during access. For 1.5 mL microcentrifuge tubes, 81-position 9x9 dividers in a 2-inch box are standard; for 15 mL conical tubes, dedicated large-tube racks are required.
Temperature monitoring and data logging
Continuous temperature monitoring systems for ULT freezers include: standalone digital thermometers with external min/max recording probes inserted through door gasket access ports; USB data loggers that record temperature at programmable intervals (1-60 minutes) with NIST-traceable calibration certificates; Wi-Fi-connected wireless sensors with 24/7 real-time cloud monitoring, configurable high/low alarm thresholds, and email/SMS notification (rated to -100 degrees C for ULT applications); and integrated freezer-connected monitoring systems that read data directly from factory-installed cabinet sensors via a dedicated data port. Annual calibration of monitoring probes against NIST-traceable standards is required for CAP, CLIA, and GxP compliance.
Backup protection systems
CO2 backup injection systems activate when cabinet temperature rises above a preset high-alarm threshold (typically 10 degrees C above the normal setpoint), injecting CO2 from an external cylinder through a solenoid-controlled valve into the freezer cabinet, maintaining temperature for 4-12 hours. LN2 (liquid nitrogen) backup injection systems provide similar protection at deeper temperatures and with longer holdover time, but require access to an LN2 supply. Both systems require connection to an external gas supply, installation of solenoid valves, and periodic cylinder replacement or LN2 refill scheduling.
Cryo labels and identification
Cryogenic-rated labels are required for sample tubes stored in ULT and cryogenic conditions; standard adhesive labels lose adhesion at -80 degrees C and fall off during access in cold rooms, causing catastrophic sample misidentification. Cryogenic labels are printed on polyester or polypropylene film with acrylic or cryogenic-grade adhesive rated to -196 degrees C (liquid nitrogen temperatures). Laser-printable cryolabels, wrap-around tube labels, and flag labels are available for 0.5 mL, 1.5 mL, 2 mL, 15 mL, and 50 mL tubes. Barcode-compatible cryolabels enable integration with laboratory information management systems (LIMS).
&nbsp;
<h2>Specifications Context</h2>
&nbsp;
Standard 2-inch (5.4 cm) sample boxes fit universal rack systems across most major ULT freezer brands (Thermo Fisher TSX, PHCbi MDF-DU, Esco Lexicon); 3-inch (7.6 cm) boxes require racks specifically designed for that format. Wi-Fi temperature monitoring sensors for ULT applications should be rated for a measurement range of at least -100 degrees C to 0 degrees C; sensors not rated for ULT temperatures lose calibration accuracy below -60 degrees C. NIST-traceable temperature calibration for monitoring probes is required at least annually under CAP and CLIA accreditation, using traceable reference standards with uncertainty documentation. Cloud-based temperature monitoring systems with 21 CFR Part 11-compliant audit trails and automated compliance reporting have become standard in GxP-regulated laboratory environments, replacing manual temperature logbooks and standalone chart recorders.&nbsp;
&nbsp;
Enhance your laboratory storage setup today&mdash;explore our freezer accessories and <a href="https://mbpinc.net/contact-us">reach out to the MBP team</a> for a quote.

Freezer Accessories

<h2>What Are Laboratory Water Baths?</h2>
&nbsp;
A laboratory water bath is a temperature-controlled instrument with a stainless steel tank filled with deionized water, an immersion heating element, a thermocouple or platinum resistance temperature sensor (PT100 or PT1000), and a PID microprocessor controller that maintains the water temperature within a tight band of the setpoint from ambient to 100 degrees C. Heat transfers from the warm water to the sample by conduction through the container walls, providing more uniform and gentle heating than direct contact with a hot block or hotplate. Standard capacities range from 5 liters (compact benchtop for 10-20 microcentrifuge tubes) to 30 liters (high-throughput for multiple flask incubations). Key construction features are the tank material (304 stainless steel standard; 316L for saline applications), lid type (gable, concentric ring, or flat), and the presence of a circulation pump. Select a water bath based on tank capacity (number and size of containers you process per run), required temperature range, stability specification, and whether active circulation is needed for uniformity.
&nbsp;
<h2>What you will find:</h2>
&nbsp;
<ul>
<li>Digital water baths: Laboratory water baths designed to provide accurate, uniform temperature control for sample incubation, warming, and other routine applications.</li>
<li><a href="https://mbpinc.net/equipments/temperature-control-equipment/temperature-controlled-baths/water-baths/water-baths-accessories">Water bath accessories: </a>Test tube racks and optional microtube racks compatible with a variety of tube sizes to maximize bath capacity and sample organization.</li>
<li>Tube holding solutions: Racks designed for 0.5 mL, 1.5/2.0 mL, 15 mL, and 50 mL tubes to securely position samples during temperature-controlled incubation.</li>
<li>Lyophilization monitoring tools: Vacuum gauges for detecting the end of primary drying in freeze-drying applications.</li>
<li>Temperature-controlled laboratory equipment: Products that support consistent heating and reliable sample handling across research, clinical, and industrial laboratories.</li>
</ul>
&nbsp;
<h2>How to Choose a Laboratory Water Bath</h2>
&nbsp;
Capacity: tank size and sample volume
Compact water baths with 5-8 L tanks accommodate 20-40 microcentrifuge or test tubes in standard racks and suit most small-lab molecular biology workflows. Mid-size 12-20 L tanks hold 50-100 tubes or multiple 250 mL Erlenmeyer flasks. Large-format 20-30 L baths handle simultaneous incubation of multiple flask sizes and are used in microbiological culture incubation and pharmaceutical dissolution testing. Confirm that the bath accepts the rack or tube holder format you use; some baths include stainless steel tube racks while others require separate purchase of tube racks or floating foam holders.
Temperature sensor type
PT100 and PT1000 platinum resistance temperature sensors (RTDs) are the current standard for digital water baths, providing high accuracy (plus or minus 0.3 degrees C at 37 degrees C for PT1000 sensors) and long-term stability without the hysteresis of bimetallic thermostats. PT1000 sensors are preferred for their lower self-heating current requirement, reducing sensor-induced temperature error at setpoint. NTC thermistor-based controls are used in lower-cost models; they are accurate near calibration temperature but less linear across the full operating range.
Analog vs. digital control
Analog water baths use a bimetallic thermostat and a dial for setpoint selection; they are less expensive but offer temperature stability of only plus or minus 1-3 degrees C and require manual reading of an external thermometer. Digital water baths with PID microprocessor control, LED or LCD display, and PT100/PT1000 sensors achieve plus or minus 0.2-0.5 degrees C stability and display actual and setpoint temperatures simultaneously. For GLP-compliant research environments and clinical applications, digital units with data logging and calibration documentation are required.
Lid type
Gable (slanted ridge) lids reduce condensate dripping onto samples by running condensation to the bath walls. Concentric ring lids provide flexible access for different container sizes (Erlenmeyers, test tubes, beakers) without removing the lid entirely. Flat lids are simple and cost-effective. Ball blanket systems (polyethylene hollow spheres floating on the bath surface) reduce evaporation and maintain temperature without a rigid lid, allowing easy sample access without cooling the bath.
Stainless steel grade
304 stainless steel tanks are standard for most molecular biology applications using deionized or distilled water. 316L stainless (with molybdenum addition) provides superior resistance to chloride-ion pitting corrosion and is preferred for baths that use saline solutions, phosphate-buffered saline (PBS), or any salt-containing media. Seamless welded tanks without internal crevices are easier to clean and prevent microbial biofilm accumulation in corners and seams.
&nbsp;
<h2>Specifications Context</h2>
&nbsp;
A digital water bath with a 20 L stainless steel tank and PT100 sensor achieves temperature accuracy of plus or minus 0.3 degrees C at 37 degrees C and stability of plus or minus 0.5 degrees C; a 20 L bath typically heats from ambient to 37 degrees C in 8-12 minutes at full power. Water baths intended for cell culture work at 37 degrees C require weekly water changes and antimicrobial additive use, as uncleaned baths at 37 degrees C can accumulate diverse microbial communities within days. Over-temperature protection and low-water alarms are mandatory safety features for any new water bath purchase; confirm that both are standard (not optional upgrades) in the unit specification before ordering. Digital water baths with microprocessor PID control, non-mercury PT1000 sensors, and integrated over-temperature protection are standard purchases for all new laboratory water bath installations, replacing legacy analog thermostat models.&nbsp;
&nbsp;
Browse our full water bath collection and <a href="https://mbpinc.net/contact-us">reach out to the MBP team</a> for a quote today.

Water Baths

FYRA | End of Drying Detection | Cannabis

FYRA Vacuum Gauge For End Of Primary Drying Detection UL/CSA/CE Certified

The FYRA End of Primary Drying Detection system helps monitor vacuum drying applications, such as freeze-drying and vacuum ovens, to accurately determine when most water or residual solvent has been removed. Using thermal and direct measurement sensors, it tracks pressure changes to signal the end of primary drying, ensuring efficient drying processes.\n\n\n\n

Units

Control Range

Range with Accuracy

Sensor Type

Dimensions

<h2>What are vacuum pump accessories?</h2>
&nbsp;
Vacuum pump accessories include protective, connective, monitoring, and maintenance components that support vacuum system performance and extend pump lifetime across all pump types.
&nbsp;
<h2 data-path-to-node="0">What You Will Find:</h2>
&nbsp;
<ul data-path-to-node="1">
<li>
Specialized dry scroll pump service kits containing high-grade replacement tip seals to restore optimal compression and peak vacuum performance.
</li>
<li>
Precision-engineered tip seal replacement kits designed to maintain reliable, oil-free seals and prevent performance degradation in compact dry scroll systems.
</li>
</ul>
&nbsp;
<h2>How to choose vacuum pump accessories</h2>
&nbsp;
Use a cold trap for solvent protection
Cold traps condense solvent and water vapors before they reach the pump, reducing contamination in oil-sealed systems and protecting diaphragms and seals in oil-free pumps.
Use manufacturer-specific maintenance kits
Each pump type requires specific replacement parts: Agilent IDP tip seal kits, Vacuubrand and Welch diaphragm kits, and Edwards or ULVAC vane and seal kits. Using compatible OEM parts ensures correct performance and longevity.
Choose PTFE tubing for chemical resistance
PTFE tubing is recommended for organic solvents and corrosive chemicals. Rubber or PVC tubing is suitable only for aqueous or low-reactivity applications.
Select correct pump oil for oil-sealed systems
Oil-sealed pumps require manufacturer-specified oil grades to maintain proper viscosity, sealing, and vacuum performance.
Use vacuum gauges for system monitoring
Vacuum gauges help verify system pressure, detect leaks, and confirm pump performance during operation.
&nbsp;
<h2>Specifications context</h2>
&nbsp;
Vacuum pump components such as diaphragms, seals, and tip seals are wear parts that must be replaced periodically using manufacturer-approved kits to ensure correct fit, material compatibility, and performance.
As of 2026, field-serviceable maintenance kits for major vacuum pump brands allow routine servicing in academic and industrial laboratories without factory intervention.
<a href="https://mbpinc.net/contact-us">Contact team at MBP</a> today for quick quote.

Vaccum Pump Accessories

Ai-DigiVac Concerto 4-Channel Vacuum & Pressure Controller

Concerto 4-Channel Vacuum Controller Standard Package

How to set up the Multi-Channel Vacuum Controller?

Concerto | Interface Basics | DigiVac

Concerto | Feature Set | DigiVac

Concerto | Setting Set Points | DigiVac

Concerto | Select Recipes | DigiVac

Concerto | Custom Input New Recipes | DigiVac

Concerto | Calibrating Concerto | DigiVac

DigiVac FYRA Bleed Vacuum Controller 10 millitorr to 6 Torr

DigiVac FYRA Bleed Vacuum Controller 10 millitorr to 6 Torr\r

JKEM DVR-200 Digital Vacuum Regulator Standard Package

JKEM DVR-200 DVR-300 Digital Vacuum Regulator

JKEM model DVR-200, an ideal instrument for laboratory vacuum regulation.\r\n

Electrical requirements

Vacuum level

Display

Vacuum connector

Unit dimensions

Warranty

DigiVac SNAP, Simple, Nimble, Automatic Vacuum Controller - Stalnless Steel

SNAP Vacuum Controller Overview | DigiVac

SNAP: How to Set Up Recipe Control | DigiVac

Tips for Vacuum Drying Temperature-Sensitive Materials with SNAP | DigiVac

SNAP Modulating Oven Process by Temperature vs. Vacuum | DigiVac

DigiVac SNAP, Simple, Nimble, Automatic Vacuum Controller - Stainless Steel\r\n

DigiVac BPG-775i with KF25 Adapter Attached

DigiVac Bullseye Piezo Rough Vacuum Gauge Isolated 775i Sensor

DigiVac Bullseye Precision Vacuum Gauge with Real-Time Analytics

Addressing Thermocouple Vacuum Gauge Tube Contamination

3 Ways to Improve Vacuum Control and Measurement | DigiVac

Range

Accuracy

 Vacuum reference

Sensor

 Vacuum connector

 Panel mount

Portable

Shipping weight

Freezers

<h2>What Are Laboratory Freezers?</h2>
&nbsp;
Laboratory freezers are engineered cold-storage instruments that hold samples at defined subzero temperatures with the precision, uniformity, and reliability that biological and pharmaceutical research requires. Standard laboratory freezers (-10 to -25 degrees C) serve DNA, RNA, PCR enzymes, primary and secondary antibodies, and chemical reagents that are stable at -20 degrees C for weeks to months. Low-temperature models (-30 to -40 degrees C) provide better stability for lipid-containing formulations, some viral stocks, and antibody conjugates that degrade at -20 degrees C over extended storage. Ultra-low temperature (ULT) freezers (-40 to -86 degrees C) use a two-stage cascade compressor refrigeration system: a high-stage HFC compressor cooling to -45 to -50 degrees C, then a low-stage hydrocarbon or HFC compressor achieving -80 to -86 degrees C. ULT freezers are the standard for cell line banking, primary cell storage, tissue biorepositories, long-term RNA archiving, and samples with irreplaceable value. Select laboratory freezer temperature based on the minimum storage stability requirement of the most labile material in the freezer, not the most stable.
&nbsp;
<h2 dir="ltr">What You Will Find:</h2>
&nbsp;
<ul>
<li>Laboratory freezers: Ultra-low temperature (-86&deg;C) freezers, -40&deg;C medical freezers, and stackable models designed for long-term storage of biological samples, reagents, and research materials.</li>
<li><a href="https://mbpinc.net/equipments/temperature-control-equipment/refrigerators-and-freezers/freezers/freezer-accessories">Freezer accessories</a>: Storage boxes, stainless steel storage drawers, CO2 backup systems, and other components that improve sample organization and freezer reliability.</li>
<li>Cold-chain transport solutions: Vacuum-insulated shipping cubes designed to help maintain low temperatures during sample transportation.</li>
<li>Freeze-drying equipment: Pharmaceutical freeze dryers and vacuum gauges for monitoring primary drying in lyophilization workflows.</li>
<li>Sample preservation solutions: Equipment and accessories that support secure storage, transport, and processing of temperature-sensitive laboratory materials.</li>
</ul>
&nbsp;
<h2>How to Choose a Laboratory Freezer</h2>
&nbsp;
Setpoint temperature
-20 degrees C is appropriate for routine nucleic acid stocks (DNA, plasmid), PCR master mixes, enzymes with glycerol storage buffer, antibodies in glycerol, and chemical reagents stable at -20 degrees C. -40 degrees C extends stability for antibody-drug conjugates, lipid nanoparticles, and some viral vectors. -80 degrees C is required for cell lines (viable storage for 5+ years), primary patient-derived cells, long-term RNA banking (RIN preservation for more than 12 months), viral stocks requiring consistent infectivity, and compounds that crystallize or degrade at -20 degrees C.
Upright vs. chest format
Upright freezers access contents through a front door with shelves and are standard in most labs due to their small footprint and easy sample access. They experience larger temperature fluctuations when the door is opened (cold air spills out from the front). Chest freezers open from the top, retaining cold air better during access and providing more stable temperatures for the contents, making them preferred for seldom-accessed long-term storage and large sample collections. PHCbi and Thermo Fisher chest ULT models store 576-672 standard 2-inch boxes in large-capacity configurations.
Cascade refrigeration system
ULT freezers use a cascade two-stage compressor refrigeration system to reach -80 degrees C. The high-stage compressor uses HFC refrigerant (R-404A or R-290/R-170 mix) to precool the evaporator to -45 to -50 degrees C; the low-stage compressor then uses a secondary refrigerant (often R-508B or hydrocarbon blend) to extract heat from the cabinet against the precooled evaporator, reaching -80 to -86 degrees C. Two-compressor cascade systems are more reliable than single-compressor designs at these temperatures; a high-stage compressor failure raises cabinet temperature slowly while the low stage continues operating, providing a warning before critical sample temperature is reached.
Insulation quality
Cabinet insulation thickness determines the rate at which the internal temperature rises during a power failure or door-open event. Standard ULT freezers use polyurethane foam insulation (20-25 cm thick walls). Premium ULT models add vacuum-insulated panels (VIPs) to the door and selected walls, reducing energy consumption and slowing temperature rise during power loss. In the event of compressor failure, a typical -80 degrees C ULT cabinet temperature rises approximately 1 degree C per minute with the door closed and no backup system.
Backup systems
For high-value sample collections, ULT freezers can be paired with CO2 or liquid nitrogen (LN2) backup injection systems that activate when cabinet temperature exceeds a preset high-alarm threshold, injecting cryogen to maintain temperature for several hours while compressor issues are addressed. External monitoring and cloud-based alert systems using NIST-traceable probes with 24/7 SMS and email alarm notification are standard best practices for freezers containing irreplaceable biological material.
&nbsp;
<h2>Specifications Context</h2>
&nbsp;
ULT freezer capacity is specified in cubic feet or liters (internal volume) and in terms of the number of standard 2-inch (5 cm) sample storage boxes the unit can hold in standard racks; a large-capacity upright ULT holds 576-672 standard 2-inch boxes at -86 degrees C. Energy consumption of a -86 degrees C ULT freezer is typically 10-20 kWh per day; new models with hydrocarbon refrigerants and variable-speed compressors use 6-10 kWh per day at -80 degrees C setpoint. Temperature recovery after a 30-second door open event takes 3-10 minutes for research-grade ULT units, compared to 30+ minutes for consumer chest freezers. All new ULT freezer models from major manufacturers use HFC or hydrocarbon refrigerants with zero ozone depletion potential (ODP = 0), replacing CFC and HCFC refrigerants phased out under the Montreal Protocol and Kigali Amendment.&nbsp;
&nbsp;
To discuss product availability or get selection guidance,&nbsp;<a href="https://mbpinc.net/contact-us">contact the MBP team</a>.

Across International Medical Grade Ultra-low Freezers, UL/CSA Certified

Low-Volume Freezers

Compressor and Cooling

Environmental and Safety

Physical Dimensions

Warranty and Compliance

Ai EasyChill -25°C to -30°C Freezers series

E-3-29 by Ai (Across International) is the EasyChill series of -25°C to -30°C upright freezers in multiple sizes, with the 29 cubic foot model providing 818 liters across 5 adjustable shelves at 37 dBA. High-efficiency inverter compressor with R290 refrigerant, auto-detecting 115V–230V input, six alarm types including door open and high ambient temperature, 48-hour battery backup, and UL 61010-1 / CSA C22.2 certification. Multiple capacity models available.

Manufacture

Ai EasyChill 9 Cu Ft -25°C Upright Freezer UL 115V

Ai EasyChill 18 Cu Ft -30°C Ultra-Low Upright Freezer UL 115V

Ai EasyChill 29 Cu Ft -30°C Upright Freezer UL 115V/230V

<h2>What Are Cold Traps?</h2>
&nbsp;
A cold trap is a device that condenses all vapors except permanent gases (hydrogen, oxygen, nitrogen) into liquid or solid form before they enter a vacuum pump or downstream vacuum system. The operating principle depends on lowering the surface temperature of the trap below the dew point of the target vapor. In vacuum applications, solvents, water vapor, and corrosive gases are captured in the trap rather than contaminating vacuum pump oil or downstream instruments. Cold traps are used in freeze-drying (lyophilization), rotary evaporation, short-path distillation, vacuum filtration, gas chromatography sample preparation, and cryogenic research setups. Mechanically refrigerated cold traps reaching -40 degrees C to -80 degrees C are widely available as standalone units with integrated compressors. Install a cold trap between your vacuum flask and vacuum pump whenever your protocol involves condensable vapors, solvents, or moisture: the cost of a cold trap is always less than the cost of pump oil contamination or pump failure.
&nbsp;
<h2 dir="ltr">What You Will Find:</h2>
&nbsp;
<ul>
<li dir="ltr" aria-level="1">
Ai T-Series Cold Traps feature top-tier 316L stainless steel and ETL certification, giving you serious cooling power without needing a drop of chilling fluid.
</li>
<li dir="ltr" aria-level="1">
Corrosion-resistant trapping units offer a much tougher defense against harsh chemicals and humidity compared to standard steel, so your gear actually lasts.
</li>
<li dir="ltr" aria-level="1">
Plug-and-play cooling systems are designed to be compact and mobile, letting you roll them into place and get straight to work without a complex setup.
</li>
<li dir="ltr" aria-level="1">
Large capacity 316L SST traps come with smart features like easy-open drain valves and secure vacuum connections to keep your liquid removal mess-free.
</li>
</ul>
&nbsp;
<h2>How to Choose a Cold Trap</h2>
&nbsp;
Cooling method
Dry ice-based traps (glass or stainless vessels surrounded by dry ice in acetone or isopropanol) reach approximately -78 degrees C and are inexpensive but require regular dry ice replenishment. Liquid nitrogen traps reach -196 degrees C and are standard for high-vacuum lines in organic synthesis and cryogenic research, but require liquid nitrogen handling infrastructure. Mechanical refrigeration cold traps are self-contained, automated, and reach -40 degrees C to -80 degrees C without expendable cryogens, preferred for routine continuous use.
Temperature vs. solvent vapor pressure
The trap temperature must be cold enough to reduce the vapor pressure of the target solvent below the operating pressure of the vacuum system. Water vapor is effectively trapped at -20 degrees C under rough vacuum; common organic solvents (ethanol, acetone, dichloromethane) require -40 degrees C to -60 degrees C for efficient condensation. Low-boiling solvents (diethyl ether, pentane) may require -80 degrees C or colder for complete trapping.
Trap volume and throughput
Trap volume must accommodate the total volume of condensable material removed during the experiment. Freeze-drying operations removing large amounts of moisture require large cold traps (1 L to 5 L capacity); small-scale vacuum line work for synthetic chemistry may need only 100 mL to 500 mL. Traps used in high-throughput rotary evaporation benefit from mechanically cooled models that can run continuously without refilling.
Material compatibility
Glass cold traps allow visual monitoring of condensate and are compatible with most solvents. Stainless steel and PTFE-lined traps are preferred for corrosive or halogenated solvents. Confirm wetted material compatibility with the solvent or gas stream before installation.
&nbsp;
<h2>Specifications Context</h2>
&nbsp;
Key specifications: achievable temperature at rated conditions; trap volume; inlet/outlet fitting size and type (typically KF/NW flange or hose barb); and compatibility with the vacuum pump type (oil-sealed rotary vane, diaphragm, scroll, or turbomolecular). Cold traps placed at the inlet of an oil-sealed rotary vane pump prevent solvent backstreaming into the pump oil, which is the most common cause of shortened pump life in solvent-handling labs. For high-vacuum applications (below 10^-3 mbar), baffle-style cold traps with cooled vanes prevent oil backstreaming from the pump into the vacuum chamber.&nbsp;
&nbsp;
Ready to give your pumps the protection they need? Browse our cold trap collection and <a href="https://mbpinc.net/contact-us">reach out to the MBP team</a> for a friendly quote today.

Cold Traps

T40-UL Standard Package

T40x-UL Standard Package

T80x-UL Standard Package

Ai T Series -40°C & -80°C Cold Trap Specifications

Ai T Series -40°C & -80°C Cold Trap

The new Ai T Series cold traps all come ETL certified, standard. They have a small footprint, but at the same time, offering you the same cooling power. New features include a large 316L SST trap, 316L corrosion-resistant trapping layers, vacuum connections, PTFE encapsulated silicone sealing gasket, and upward KF25 vacuum connections providing you safer and easier vacuum tubing connection and removal. No chilling fluid is required, just plug and play.\r\n\r\n

Ai -40Â°C 1.5L Capacity Cold Trap w/ 500ml x 3 Glass Traps ETL

Ai -40Â°C 4.6L Capacity 316L SST Cold Trap w/ KF25 Ports ETL

Ai -80Â°C 5L Capacity 316L SST Cold Trap w/ KF25 Ports ETL

<h2>What is a Tube Furnace?</h2>
&nbsp;
A tube furnace is an electric heating instrument with a central cylindrical bore through which a sealed work tube is inserted, surrounded on the outside by resistive heating elements embedded in refractory insulation. Gas inlet and outlet fittings seal the tube ends with flanges, enabling the introduction of specific gas atmospheres or evacuation for vacuum operation. Quartz (fused silica) tubes are transparent, allowing visual observation, and are rated for continuous use to 1,200 degrees C. Alumina (Al2O3) ceramic tubes are opaque and stable to 1,700 degrees C, with higher chemical resistance to alkaline materials. The uniform heating zone - the central portion of the tube where temperature uniformity meets the manufacturer's specification (typically plus or minus 1-5 degrees C) - defines where samples must be placed for consistent results. Choose a tube furnace for any process requiring a controlled gas atmosphere or vacuum; choose a muffle furnace for open-air ashing, calcination, or sintering where atmosphere control is not needed.
&nbsp;
<h2 dir="ltr">What You Will Find:</h2>
&nbsp;
<ul>
<li dir="ltr" aria-level="1">
CVD tube furnace systems come fully equipped with gas mixing and pumping hardware, making them a complete solution for high-level chemical vapor deposition.
</li>
<li dir="ltr" aria-level="1">
Rotary and tilting furnaces provide continuous sample agitation during the heating process, ensuring every part of your material receives uniform thermal treatment.
</li>
<li dir="ltr" aria-level="1">
Split tube furnace designs feature a top-opening structure that makes it incredibly easy for your team to swap tubes or inspect samples mid-run.
</li>
<li dir="ltr" aria-level="1">
Multi-zone heating units allow you to create specific temperature gradients across the tube, giving you professional-level control over complex thermal profiles.
</li>
<li dir="ltr" aria-level="1">
RF generators and PE/CVD setups provide the specialized power needed for plasma-enhanced processes, perfect for cutting-edge thin-film research.
</li>
<li dir="ltr" aria-level="1">
Alumina tube furnaces utilize high-purity ceramic tubes and sealing flanges to maintain a clean, high-temperature environment up to 1700&deg;C.
</li>
</ul>
&nbsp;
<h2>How to Choose a Tube Furnace</h2>
&nbsp;
Work tube material
Quartz (fused silica) tubes are standard for processes up to 1,200 degrees C, are transparent (allowing visual process monitoring), and are available in diameters from 25 to 200 mm. Above 1,200 degrees C, quartz devitrifies (turns opaque and brittle) and softens. High-purity alumina (99.7% Al2O3) tubes extend the usable range to 1,700 degrees C and are chemically more resistant than quartz to alkali vapors and some metal-organic precursors used in CVD. Specialty tube materials (molybdenum, tungsten, Inconel) are used for corrosive-atmosphere or extreme-temperature applications.
Single-zone vs. multi-zone heating
Single-zone tube furnaces produce one uniform temperature zone (typically 10-30 cm long) and are standard for most annealing, sintering, and CVD applications. Multi-zone furnaces have two or more independently controlled heating zones along the tube length -- enabling temperature gradients for Bridgman crystal growth, sequential thermal profiles (debinding followed by sintering in a single run), or extended uniform zone length by running outer zones at higher power to compensate for end cooling. Multi-zone configurations feature 30-segment programmable PID control per zone and temperature control accuracy of plus or minus 1 degree C in research-grade models.
Bore diameter and heated zone length
Standard bore sizes are 25 mm (compact single-sample), 50 mm (most common research format), 80 mm, and 100 mm inner diameter for larger samples or substrate wafers. Quartz tube diameters range from 25 to 300 mm up to 1,200 degrees C; alumina tubes are available from 25 to 100 mm for processes to 1,700 degrees C. The heated zone length (10-60 cm for single-zone models) determines maximum sample length; all sample material must fit within the uniform hot zone.
Horizontal vs. vertical orientation
Horizontal tube furnaces position the tube axis parallel to the bench surface, are the most common configuration, and allow easy sample insertion via push-rod with consistent gas flow from one end to the other. Vertical tube furnaces orient the tube perpendicular to the bench, enabling gravity-assisted processes such as powder sintering, where material settles uniformly in the crucible, and crystal growth methods that exploit natural convection. Vertical configurations also reduce bench footprint for space-limited labs.
Split-hinge design
Split-hinge (clam-shell) tube furnaces open along the length of the furnace body to allow tube insertion or removal without threading through the furnace from one end. Benefits include faster tube material changes during process development, the ability to use shorter tube segments, and rapid forced cooling by opening the furnace after a run. Split-hinge models are popular for CVD process development labs where tube configurations change frequently.
Gas flow and safety requirements
Hydrogen-containing atmospheres require dedicated safety measures beyond standard inert gas setups: combustible gas sensors, local exhaust ventilation, solenoid emergency shut-off valves, nitrogen pre- and post-purge sequences, and grounding of all gas fittings. Mass flow controllers (MFCs) provide precise gas flow rate control (0-500 standard cm3 per minute, typical range) for reproducible CVD deposition conditions. Vacuum operation requires rotary vane or turbomolecular pumps, vacuum gauges, and leak-tested stainless steel Swagelok connections.
&nbsp;
<h2>Specifications Context</h2>
&nbsp;
Uniform heating zone temperature uniformity of plus or minus 1-3 degrees C for research-grade single-zone tube furnaces is measured by traversing a calibrated thermocouple along the tube axis at maximum setpoint; confirm this measurement in supplier documentation. The maximum heating rate is typically 10-30 degrees C per minute; room temperature to 1,700 degrees C takes approximately 170 minutes at the maximum rate for alumina tube models with MoSi2 elements. Tube furnace bore diameters of 50 mm and 80 mm cover the majority of research sample formats; 25 mm compact models suit single-sample inline gas-flow experiments. Integrated turnkey tube furnace systems combining furnace body, MFC gas control manifold, vacuum pump, and 30-segment programmable touchscreen controller are available from specialist manufacturers, reducing new CVD process setup time significantly.
&nbsp;
To discuss product availability or get selection guidance,&nbsp;<a href="https://mbpinc.net/contact-us">contact the MBP team</a>.

Tube Furnaces

Quartz tube (60-100mm: 2 pcs, 150-250mm 1pc)

Stainless steel vacuum sealing flanges w/ pressure gauge

Clamp, O-ring, and Valve (Pre-installed on flange)

Alumina thermal block (60-100mm: 2 pcs, 150-250mm 1pc)

Furnace and Eurotherm or Shimaden controller manual

Eurotherm USB OR Shimaden CD for software

STF1200 Standard Package

How to Program the Across International Tube Furnace Eurotherm Temperature Controller?

1-Zone Specifications

2-Zone Specifications

3-Zone Specifications

1200C 1-3 Zone Top-Open Tube Furnace Specifications

1200C 1-3 Zone Top-Open Tube Furnace w/ Kanthal Element

Ai STF1200 series top-open split chamber tube furnaces feature the famous Kanthal (Sweden) spiral wire coils embedded in Mitsubishi (Japan) high quality grade 1500 alumina fiber insulation. A double walled steel internal housing helps minimize heat loss to exterior surface.\r\n

1-Zone 1200°C Split Tube Furnace

1-Zone 1200°C Split Tube Furnace 100mm

1-Zone 1200°C Split Tube Furnace 150mm

1-Zone 1200°C Split Tube Furnace 200mm

1-Zone 1200°C Split Tube Furnace 250mm

Stainless steel vacuum sealing flange set w/ pressure meter

TF1700 Standard Package

Across International Tube Furnace Flange Setup

1700C 1-3 Zone Tube Furnace with Alumina Tube and Sealing Flanges Specifications

TFM2.1700 Furnace Specifications

TFM3.1700 Furnace Specifications

1700C 1-3 Zone Tube Furnace with Alumina Tube and Sealing Flanges

TF1700 series tube furnaces feature a chamber with Mitsubishi (Japan) high quality alumina fiber insulation and molybdenum silicide heating elements. A double walled steel internal housing helps minimize heat loss to exterior surface. Furnace operation is controlled by Eurotherm (UK) digital multi-segment controller with built-in digital communication port and USB adaptor, allowing the user to connect to a PC for remote control and monitoring of the furnace. You can also save or export test results.\r\n\r\n