Posted in | Gas Analyzer

Intelligent Sensor for H2S Gas Detection: S4000TH

The S4000TH Intelligent Gas Sensor from MSA is a microprocessor-based transmitter built for use with General Monitors' thin film metal oxide semiconductor (TFMOS) sensors to detect H2S gas. The system features one-person calibration and can almost self-calibrate by just activating a magnetic switch and applying gas. It detects hydrogen sulfide in 0-20 parts per million (ppm), 0-50 ppm or 0-100 ppm levels over a broad temperature range.


  • Complies with strict ISA S92.0.01, Part 1, 1998 performance standard set by ISA and approved by FM
  • Event logging stores gas check, calibration, fault and alarm event history
  • Industry standard 4-20 mA output for fault indication and remote alarm
  • HART and Modbus communication offers full status and control capability in the control room
  • Calibration, calibration check and setup mode make operation and maintenance simple
  • Warning, alarm and fault relays provides local alarm capability
  • Remaining sensor life indication decreases downtime by giving an estimate of remaining sensor life



  • ATEX
  • CE
  • CSA
  • FM
  • IECEx
  • PESO

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