Gas Detector Sensor Gas Detected Hydrogen Sulfide Measurement Range 0 to 500 ppm Compatible Detector Model/Series Ventis MX4 Compatible Detector Grainger Part Number 5JNL6 Sensor Type Electrochemical For Detector Type Portable Compatible Detector Manufacturer Part Number MX4-K02311 MX4-K02321 VTS-K1231100101 VTS-K1231101101 VTS-K1232100101 VTS-K1232101101 VTS-K1232110101 VTS-K1232111101 Sensor Life 2 yr Series Ventis MX4