For use in SIL 3 applications, Model S4000CH hydrocarbon gas detector is approved by FM, CSA, ATEX, and GOST, and has CE marking. Along with precision catalytic bead sensor, detector has 3-digit display and explosionproof housing, which allows data to be processed locally at sensor site. It provides status indication and alarm outputs, and includes relay contacts that can be used to indicate alarm/fault condition and dual redundant Modbus or HART communication.