Laboratory Heaters for Bath and Circulation
Laboratory heaters are instruments that raise the temperature of a circulating fluid or open bath for applications including reagent warming, enzyme activation, biological incubation, cell culture, and temperature control of chromatography columns, viscometers, and densitometers. Types include open bath heaters, immersion circulators, and closed-system heating circulators, covering temperatures from ambient up to 200 degrees C or higher on select models.
MBP provides direct procurement support and purchase-order ordering for laboratory heating equipment for US and Canadian research institutions. Request a quote for laboratory heaters for bath heating, fluid circulation, and temperature-controlled workflows by contacting customerservice@mbpinc.net.
Heaters
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What Are Laboratory Heaters?
Laboratory heaters are temperature-control instruments that raise the temperature of a fluid (deionized water, buffer, glycol, or silicone oil) and maintain it at a stable setpoint for connected equipment or for samples immersed in the bath. Open bath heaters expose the fluid surface and allow direct sample contact; closed-system heaters circulate heated fluid through external tubing to jacketed vessels, columns, or instruments without evaporation loss. Immersion circulators clip onto an existing open bath and add a heating element and pump without requiring a dedicated bath unit. Applications span reagent and media warming, enzyme activity assays, blood banking thaw protocols, hybridization reactions, and food stability testing. Choose an open bath heater for direct sample immersion at up to 100 degrees C; choose a closed-system heater for external circulation, jacketed vessels, or temperatures above 100 degrees C.
What You Will Find:
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Julabo Heating Circulators use stainless steel bath tanks and powerful pumps to provide uniform warmth for high-temperature research.
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Refrigerated-Heated Circulators offer versatile temperature ranges, allowing you to switch between deep cooling and intense heating in one system.
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Ai Compact Heated Recirculators deliver reliable heating up to 100°C in a space-saving design perfect for small-scale benchtop projects.
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Induction Heaters with Timers provide rapid, localized heating for specialized material science using advanced frequency technology.
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HUBER Heating Units and Fluids combine user-friendly digital interfaces with high-quality transfer media for smooth, long-term thermal management.
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PolyScience Heated Circulators feature robust safety controls and digital displays for precise management of high-temperature laboratory runs.
How to Choose a Lab Heater
Heating method: open bath vs. closed system vs. immersion
Open bath heaters (sometimes called circulating water baths) are the most common format for biological and enzymatic work up to 100 degrees C. They allow direct tube or flask immersion and are easy to clean. Closed-system heaters use a smaller reservoir, a stronger pump, and a powerful heating element to push heated fluid externally, preferred for jacketed vessels, columns, or high-temperature applications. Immersion circulators convert an existing open bath into a constant-temperature bath at a lower cost than a full benchtop circulator.
Temperature range
Most open bath heaters cover ambient temperatures to 99 degrees C, which covers cell culture, hybridization, and most enzymatic workflows. Closed-system heaters reach 150 degrees C to 200 degrees C for materials testing, food stability, and polymer research. Certain high-temperature models reach 250 degrees C and above, but require compatible heat-transfer fluids such as silicone oil rather than water.
Bath volume and heating capacity
Match bath volume to your sample load. Small-footprint open baths start at 2 L to 4 L; larger models run to 28 L or more for high-throughput workflows. Heating capacity in kW determines warm-up time: 1 kW to 2 kW is typical for standard benchtop units, while closed-system heaters with external circulation often specify 3 kW or higher for rapid heat-up.
Temperature uniformity and stability
Circulating heaters outperform non-circulating models on temperature uniformity across the bath. Digital PID controllers maintain stability to plus or minus 0.1 degrees C at most biological setpoints. Open baths without circulation are acceptable for batch incubations but not for assays requiring tight temporal control.
Control and connectivity
Entry-level units offer a simple digital setpoint; advanced models include programmable temperature profiles (ramp and soak), over-temperature alarms, lockout features, RS-232/RS-485 connectivity, and compliance with IEC 61010-1 and DIN 12876.
Specifications Context
Temperature stability specifications are measured at a steady-state setpoint with the lid closed; actual stability in use depends on room temperature fluctuations, lid openings, and sample volume. Rated working temperature in DIN 12876-1 Class I and Class II units must be at least 25 degrees C below the bath fluid flash point, relevant if ethanol or glycol solutions are used as bath fluid. For biological applications using water as the bath fluid, this constraint is not relevant. Units listing IEC 61010-2-010 certification meet safety requirements for laboratory heating equipment.
Looking to turn up the precision in your lab? Explore our heaters and reach out to the friendly MBP team for a custom quote today.
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