The Formaldehyde (HCHO) sensor is a replacement sensor for any of the MultiRAE family of gas detection meters or the ToxiRAE Pro. Sensor Type: Electrochemical Range: 0 to 10 ppm Resolution: 0.01 ppm Bias/Equilibration: No bias/10 min. after installation Temperature Range: -4° F to 122° F (-20° C to 50° C) Pressure Range: Atmospheric ±10% Operating Humidity: 15 to 90% RH non-condensing Storage Life: 6 months in sealed container Storage Temperature: 32° F to 68° F (0° C to 20° C) Operating Life: 1 year in air Warranty: 1 year from date of shipment Calibration Gas: 9 ppm HCHO, or equivalent of 50 ppm CO, balance air Supported Instruments: MultiRAE Lite, MultiRAE, MultiRAE Pro, and ToxiRAE Pro