Gas Detector Sensor Gas Detected Sulfur Dioxide Measurement Range 0 to 150 ppm Compatible Detector Model/Series Ventis Pro5 Compatible Detector Grainger Part Number 49JZ89 Sensor Type Electrochemical For Detector Type Portable T90 Response Time 25 sec Sensor Life 2 yr Series Ventis Pro5 Resolution 0.1 ppm T50 Response Time 10 sec Operating Temperature - Maximum 122 Degrees F Operating Temperature - Minimum -4 Degrees F Chemical Formula SO2