Gas Detector Sensor Gas Detected Methane Measurement Range 0 to 100 Percent LEL Compatible Detector Model/Series Radius BZ1 Compatible Detector Grainger Part Number 52HP37 Sensor Type Catalytic For Detector Type Portable T90 Response Time 30 sec Compatible Detector Manufacturer Part Number 18109396-ABC Sensor Life 2 yr Series Radius BZ1 Resolution 1 ppm T50 Response Time 10 sec Operating Temperature - Maximum 131 Degrees F Operating Temperature - Minimum -4 Degrees F