Powell Fabrication & Manufacturing, Inc.

Gas Detection Toxic Transmitters


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Gas Detection Systems - Toxic Transmitters

Toxic Transmitters integrate with Powell Valve Closure Systems by measuring the level of unseen hazardous gas detected in the area. A signal is then sent to the receiver. The receiver sends the input to the Powell Valve Closure System Control Panel which activates the actuator to close the container valve. Within seconds from the time the unseen hazardous or combustible gas is detected, the container valve is closed, stopping what otherwise would have been a reportable release.

Powell Valve Closure Systems can be configured to respond to input from a variety of gas detection systems. Powell recommends the following toxic transmitters and gas detectors:

4600 GasPlus® Universal Transmitter (PDF)

Toxic Transmitter

  • Local Display
  • Non-intrusive calibration
  • No sensor warm-up time
  • Remote sensor maintenance
  • Sensor removal without the need to declassify the area
  • Sensor end-of-life indicator
  • Optional built-in relays
  • RS-485/232 MODBUS RTU output (4600MB)
  • Security Lockout (4600 MB)


Freedom® 5000 Transmitter (PDF)

Toxic Transmitter

  • Sensor warm-up times
  • Corrosion resistance
  • RFI/EMI induced alarms eliminated
  • Field maintenance and calibration
  • No stocking additional electronics for various sensor types
  • Non-intrusive operation/calibration
  • No sensor pins or wires
  • Intrinsically safe

Freedom 5600 Gas Detector (PDF)

Freedom 5600

  • Sensor warm-up times are reduced
  • Corrosion resistance
  • No RFI/EMI induced alarms
  • Field maintenance and calibration
  • No stocking additional electronics for various sensor types
  • No sensor pins or wires

Protect your employees and investments from toxic or combustible gases by incorporating a Powell Valve Closure System into your Risk Management Plan.

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