Compared to the MSA Altair 4X multi-gas detector, the 4XR is still compatible with the MSA Galaxy GX2 stand. MSA Altair 4XR Multigas Detector (LEL/O2/CO/H2S) Charcoal. The MSA Altair 4XR multi-gas detector can detect combustible gases, oxygen, carbon monoxide and hydrogen sulphide levels with XCell sensors.
