Gas Detector Sensor Gas Detected Ammonia Measurement Range 0 to 500 ppm Compatible Detector Model/Series MX6 iBrid Compatible Detector Grainger Part Number 41H613 Sensor Type Electrochemical For Detector Type Portable Sensor Life 1 yr Series MX6 iBrid Resolution 1 ppm Operating Temperature - Maximum 131 Degrees F Operating Temperature - Minimum -4 Degrees F Chemical Formula NH3