Gas Detector Sensor Gas Detected Carbon Monoxide Measurement Range 0 to 2 000 ppm Compatible Detector Model/Series Ventis Pro5 Compatible Detector Grainger Part Number 49JZ91 Sensor Type Electrochemical For Detector Type Portable T90 Response Time 20 sec Sensor Life 4 yr Series Ventis Pro5 Resolution 1 ppm T50 Response Time 10 sec Operating Temperature - Maximum 122 Degrees F Operating Temperature - Minimum -40 Degrees F Chemical Formula CO