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ST-49 EC

ST-49 EC
ST-49 EC

RC Systems’ ST-49 EC O2 sensor and toxic gas detector utilizes a 2-wire 4-20mA sensor transmitter. It accepts low-power, electrochemical oxygen or toxic gas detection modules and functions in a sink mode to transmit gas value to the appropriate receiver device.
This gas detector is suitable for Division 1 and Division 2 hazardous areas. It may be installed as an intrinsically safe device with a barrier, or explosion-proofed for NEMA 7 installations.
Use the configurator below to request a quote on a ST-49 EC O2 sensor and toxic gas detector. Contact RC Systems to order or for more information.

Features & Highlights of the ST-49 EC

  • Field replaceable toxic gas/oxygen sensor module
  • Range & target gas configured on sensor module
  • Low level sensor signals are protected within stainless steel sensor head for improved system noise immunity
  • Industry standard 4-20mA signal may be transmitted thousands of feet on 2-wires
  • 2-wire 4-20mA signal is nonpolar with protective “steering diode” interface
  • Missing sensor forces <2mA FAULT indication
  • Standard “Fault Supervision” circuitry continuously monitors for failed sensor. 4-20mA output transmits <2mA during failures.
  • Designed for use with RC Systems’ 2-, 4-, 16-, or 64-channel controllers. 
  • Area Classification: Division 1 Explosion Proof
  • Junction Box: Add Aluminum Junction Box
  • Gas Type: Hydrogen Sulfide
  • Sensor Type: 10-9512 Sensor, EC, Hydrogen Sulfide
  • Sensor Range: 0-10ppm
  • Splash Guard: No Splash Guard
  • Intrinsically Safe Barrier: Barrier Not Required for Explosion Proof Applications