
H3565-O2REG by Benchmark Scientific is an optional O2 gas regulator for SureTherm™ CO2 incubators (H3565 series), enabling tri-gas incubation with controlled O2, CO2, and N2. Connects to CGA580 O2 cylinders; 1/4 in tubing adapter included. Used for hypoxia cell culture (1–5% O2), stem cell protocols requiring sub-atmospheric oxygen, and hyperoxia studies. Confirm N2 supply availability for sub-atmospheric O2 control before ordering.