Gas Detector Sensor Gas Detected Carbon Monoxide Measurement Range 0 to 1 500 ppm Compatible Detector Model/Series Radius BZ1 Compatible Detector Grainger Part Number 52HP24 Sensor Type Electrochemical For Detector Type Portable T90 Response Time 19 sec Sensor Life 2 yr Series Radius BZ1 Resolution 1 ppm T50 Response Time 8 sec Operating Temperature - Maximum 122 Degrees F Operating Temperature - Minimum -4 Degrees F Chemical Formula CO