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Hydrogen sulphide gas detector

03 December 2008

The S4000TH Hydrogen Sulphide Gas Detector from General Monitors protects against hydrogen sulphide (H₂S), and features the Hart communication protocol.
A user can perform gas checks or single point calibrations through a magnetic interface, Hart, or Modbus. No special tools or area declassification is required. The S4000TH stores the maintenance event with date and time stamp for improved record keeping.

Hydrogen sulphide gas detector

The gas detector is suitable for use in SIL 3 systems and approved by CSA and FM. It is compliant with the ATEX directive and has the CE marking. Gas concentrations are displayed on a three-digit LED enclosed in an explosion-proof housing. The S4000TH is also available with an optional relay configuration that is appropriate for SIL 2 processes.

The S4000TH is equipped with a metal oxide semiconductor (MOS) sensor. MOS sensors are unaffected by ammonia, hydrogen, alcohols, and other gases commonly present in plant environments. The detector monitors H₂S gas in parts per million (ppm) and provides status indication and alarm outputs. The MOS sensors are compliant with ISA 92.0.01 Part I – 1998.