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LEL Gas Detector – S4000CH

Gas Detector
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LEL Gas Detector – S4000CH

LEL Gas Detector – General Monitors S4000CH Intelligent Sensor

The Model S4000CH Intelligent LEL Gas Detector is a microprocessor- based transmitter designed for use with General Monitors’ catalytic bead sensors.

The unit features one person calibration and can virtually self-calibrate by simply activating a magnetic switch and applying gas. It is designed to monitor combustible gases and vapors within the lower explosive limit (LEL) and provide status indication and alarm outputs. Complies with ANSI/ISA 12.13.01-2000 performance requirements for combustible gas detectors.


  • Event logging stores fault, gas check, calibration, and alarm event history
  • HART and Modbus communication provides complete status and control capability in the control room
  • Industry standard output 4-20 mA output for remote alarm and fault indication
  • Warning, alarm & fault relays provide local alarm capability
  • Calibration, calibration check, setup mode simplifies operation and maintenance
  • Remaining sensor life indication reduces downtime by providing an estimate of remaining sensor life
  • Fully automatic calibration possible with automatic remote gas calibrator (ARGC)


  • Refineries
  • Drilling rigs and platforms
  • Fuel loading facilities
  • Compressor stations
  • Oil well logging
  • LNG / LPG processing and storage facilities
  • Wastewater treatment facilities
  • Gas turbines
  • Solvent vapors
  • Chemical plants