Best Seller | MSA SAFETY 10121213 Replacement Sensor,Detects H2S, CO Gas Detector Sensor, Gas Detected Carbon Monoxide, Hydrogen Sulfide, Measurement Range Carbon Monoxide (0 to 1,999 ppm), Hydrogen Sulfide (0 to 100 ppm), Compatible Detector Model/Series ALTAIR 4XR, ALTAIR 5X, Compatible Detector Grainger Part Number... ... more MSA SAFETY 10121213 Replacement Sensor,Detects H2S, CO Gas Detector Sensor, Gas Detected Carbon Monoxide, Hydrogen Sulfide, Measurement Range Carbon Monoxide (0 to 1,999 ppm), Hydrogen Sulfide (0 to 100 ppm), Compatible Detector Model/Series ALTAIR 4XR, ALTAIR 5X, Compatible Detector Grainger Part Number... | | $488.99 go to store |