HCL pressure sensors from Sensortechnics Inc., Walpole, MA, measure low gauge or differential pressures from 5–75 mbar. They are precision calibrated, temperature compensated, and offer ratiometric mV output signals. Special compensation technology provides high offset stability. Features include a high input resistance, virtually no position sensitivity, and a range of housing options. Applications include medical ventilators, respirators, and anesthesia machines; environmental controls; and HVAC.