Highly Intelligent Combustible Gas Detector With HART For Easy Field Communication

The S4000CH Gas Detector features General Monitors’ precision catalytic bead sensor. This sensor provides exceptional reliability for precise gas detection, ease of set-up and use, as well as simple maintenance. In harsh industrial process environments, it delivers dependable safety monitoring with low cost-of-ownership.

HART is a field-proven instrumentation communications protocol that is easy-to-use and provides reliable two-way digital communication without disturbing the integrity of the 4-20 mA analog signal. HART permits remote process variable interrogation, cyclical access to process data, parameter setting and diagnostics. Unlike other protocols, HART is backward compatible with the installed base of instrumentation in use today.

S4000CH Combustible Gas Detector

The S4000CH is a hydrocarbon gas detector suitable for use in SIL 3 applications and approved by FM, CSA, ATEX, GOST and has CE Marking. It features a three-digit display and an explosion-proof housing, which allows all data to be processed locally at the sensor site. The S4000CH is also available with an optional relay configuration that is appropriate for SIL 2 processes. The S4000CH features one-person calibration for ease of maintenance.

With its dependable catalytic bead sensor, the S4000CH monitors combustible gas and vapors within the lower explosive limit (LEL) and provides status indication and alarm outputs. In addition, the S4000CH is equipped with relay contacts that can be used to indicate an alarm or fault condition and dual redundant Modbus or HART communication. Configurations with relays, Modbus and HART are available to meet many needs.

The Model S4000CH has four different operating modes. First, a normal operating mode in which alarms are active and the display and the 4-20 mA readings are proportional to the gas concentration at the sensor. Second, a gas check mode that allows the user to apply a gas and check the sensor response while alarm outputs are inhibited. Third, a calibration mode in which gas is applied to the sensor to calibrate the unit. Finally, a setup mode that allows the user to review or change setup options such as relay settings, calibration level and Modbus parameters.