Replacement sensors in CO, H2S, PH3, CL2, SO2, NO2, NH3, HCN. These replacement sensors are for the MSA Altair Pro & Single Gas Detectors only. Please choose your sensor from the list below. If no option is selected, you will receive a carbon monoxide sensor.
- Can be Purchased for CO, H2S, PH3, CL2, SO2, NO2, NH3, HCN
- Made Specifically for the MSA Altair Pro Single Gas Detectors Only










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