Replacement Sensor Gas Detected Combustible Gas Measurement Range 0 to 150 ppm Sensor Type LEL Compatible Detector Manufacturer Part Number VTS-K5232100101 VTS-K5232101101 VTS-K5232110101 VTS-K5232111101 Resolution 0.1 ppm Operating Temperature - Maximum 50 Degrees F Operating Temperature - Minimum -20 Degrees F Chemical Formula LEL