H2S gas detector features Hart protocol
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General Monitors product story
Edited by the Engineeringtalk editorial team
Dec 4, 2008
The S4000TH hydrogen sulphide gas detector from General Monitors is designed to protect people, equipment and plants from the dangers of H2S, and features the Hart communication protocol.
Hart is a field-proven instrumentation communications protocol that provides two-way digital communication without disturbing the integrity of the 4-20mA analogue output.
Hart permits several variables, parameters, device configurations and device diagnostics to be transmitted digitally at the same time as the analogue signal.
Unlike other digital communication methods, Hart is backward compatible with the installed base of instrumentation in use today.
Due to the detector's multiple communication methods, 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 also stores the maintenance event with date and time stamp for improved record keeping.
It is suitable for use in SIL 3 systems and approved by CSA and FM.
Additionally, the detector 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.
It is equipped with a metal oxide semiconductor (MOS) sensor.
MOS sensors are highly selective; they 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 and available in 0-20ppm, 0-50ppm or 0-100ppm to support a wide range of applications.
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