54-47-19
Replacement carbon monoxide, H₂ resistant (CO-H) sensor (4-Series)
SR-M1-1S
Replacement carbon monoxide (CO) sensor (1-Series)
SR-H1-1S
Replacement hydrogen sulfide (H₂S) sensor (1-Series)
PS-RH04S
Replacement hydrogen sulfide (H₂S), extended range sensor (4-Series)