Product model withdrawn from sale

Device group: Ventilation controllers
Device type: WG.NG
Device model: WG-28.NG

WG-22.NG microprocessor-controlled detector is used for continuous monitoring of carbon monoxide (CO) levels in air. The monitoring is performed in premises where the gas is likely to occur, through periodic measuring of CO levels. When the preset threshold levels are exceeded, visual and acoustic alarms of the detector are engaged and its control outputs are activated.

Scope of application

  • Closed garages and underground parking lots – ventilation control
  • Boiler rooms with furnaces fuelled by solid or liquid fuels
  • Gas-fuelled boiler rooms
  • Production buildings where CO is likely to occur (technological processes)
  • Permanently manned premises adjacent to boiler rooms
  • Premises with equipment fuelled by coke-oven gas


  • Measurement of carbon monoxide at extremely low levels;
  • Easily exchangeable sensor unit;
  • Built-in microprocessor controlling all functions of the detector = reliability, work stability, temperature compensation, fully automatic unit;
  • Gas detector + power supply + siren + control unit – all in one solid case, IP43;
  • Two (or three) independent alarm thresholds calibrated to industry standards or tailored to customer’s requirements;
  • FAULT relay output triggered by detector failure, blown fuse or power supply failure;
  • 12VDC alarm output to control external sirens or lamps;
  • 12VDC power supply – model WG-22A; option: 24VAC/DC;
  • Optional: built-in battery back-up (up to 6h) – model WG-22B;
  • All detectors are calibrated in our own GAZEX Calibration Laboratory operating in accordance with PN-EN ISO/IEC 17025 (PCA accreditation No AP150).

Block diagram

Technical parameters

Contact control outputs
Voltage control outputs 12VDC
Control output "Fault"
Visual signalling, built-in
Supply voltage
175 x 190 x 96 mm


Series Technical data Device information sheet Instruction manual Declaration of conformity

Suggested products

Internal LED warning boards to visually present the alarm status appearing at the control outputs
Illuminated warning boards to visually present the alarm status appearing at the control outputs