Gas Detector Sensor Gas Detected Sulfur Dioxide Measurement Range 0 to 20 ppm Compatible Detector Model/Series AreaRAE AreaRAE Plus AreaRAE Pro MeshGuard MultiRAE Sensor Type Electrochemical Compatible Detector Manufacturer Part Number AreaRAE Pro/Plus MultiRAE ToxiRAE Pro Sensor Life 2 yr Series AreaRAE AreaRAE Plus AreaRAE Pro MeshGuard MultiRAE Sub-Brand RAE Resolution 0.1 ppm Operating Temperature - Maximum 122 Degrees F Operating Temperature - Minimum -4 Degrees F