Gas Detector Sensor, Gas Detected Nitrogen Dioxide, Measurement Range 0 to 20 ppm, Compatible Detector Model/Series TX-12-ND, TX-6-ND, Compatible Detector Grainger Part Number 36CF96, 45CJ98, Sensor Type Electrochemical, For Detector Type Fixed, T90 Response Time 50 sec, Compatible Detector Manufacturer Part Number TX-12-ND, TX-6-ND, Sensor Life 2 yr, Series Commercial Series, Sub-Brand Macurco