OI-120-HS...............Catalytic Bead Combustible Gas (LEL) Sensor in Certified Stainless Steel Sensor Housing
OI-WF190-CB..........Control Board
OI-WF690-RVID......Radio – 900MHz
OI-WF690-AF..........Explosion Proof Antenna Fitting
OI-WF690-AN-A......Dipole Articulating Antenna (900MHz)
OI-500-R..................Red Rain/Splash Guard