Crowcon Gasmonitor Gas Alarm & Control System


The Crowcon Gasmonitor Plus gas detection monitoring controller is the control system on Crowcon’s 19″ flexible rack model. This micro-control device is used smoothly in the world, both inland and offshore. Gasmonitor Plus gas detection monitoring controllers can monitor up to 16 probes or 32 fire areas per rack. The racks can be supplied separately, or integrated onto walls or floors according to packing standards.

A separate gas level display is provided for each probe. Gas detection monitoring controllers can be built into very large systems and adjusted to each environmental requirement.


Easy to use

  • All daily functions are available from the front of the controller – push buttons for simple control.
  • Unique bar visual function for each channel – provides immediate observation for gas concentrations
  • The usual led warning light on the card displays, all the states of the rack can be checked with just a glimpse.

Flexible architecture

  • Infinitely scala expandable system
  • Module structure – customized mainly on the lowest limit of wiring
  • The same standard as the output industry – which will be fully edested with the current racks – field protection mounting system
  • Relay module options – flexibility and reduced configuration and monitoring connection cable

Simple maintenance

  • Each channel is prohibited separately – safety equipment does not affect during inspection
  • Periodical calibration on the front of the controller – reducing the cost of workers by up to half
  • A global gas card – reducing replacements


  • Dimensions: 483 x 133 x 294 mm (19.0 x 5.25 x 11.5 ins)
  • Weight: 9.5 kg (21 lbs)
  • Packing: Aluminum Alloy Box
  • Connection: Mount the rack (type 3u). Optionally mounted on the wall or floor, size as required.
  • Number of channels: 16 channels per rack
  • Operating temperature range: 0°C to +50°C (32°F to +122°F)
  • Operating humidity range: 0-95% non-condensing
  • Input:
    • Gas: 2 or 3 wires 4~20mA (sink or source) or mV
    • Fire detector, smoke detector or heat probe: Up to 32 devices per rack (16 double zone for fire alarm models)
  • Output:
    • Analog signal: 16 x 4-20mA, Max load 960Ω or 1-5V, minimum 100Ω
    • Peripherals: 24Vdc power supply, maximum current 200mA per warning level
  • Relay:
    • Up to 84 DPCO contact capacity 5A@250Vac
    • Assignment – Common Alarm 1, Alarm 2, Alarm 3, Fault
      Per channel Gas alarms 1, 2 & 3, fire & fault
      Voting Up to 16, configurable
      Relay modes Energised/de-energised, latched/non-latched, time-delayed, pulsed
  • Digital connection: DCS/PLC/PC/Local configuration link: RS-232
  • Save data: Datalogger integration – Communication data via communication connection
  • Dashboard directive:
    • Number of channels: 4-line/ 20-character LCD
    • Gas concentration: same as above, plus blue Led bar
    • Unit of measurement: % LEL, ppm, % Vol, Fire
    • System Error: Yellow Led
  • Warning directive:
    • Visual – Alarm: 3 individual & 3 common alarms (red LED); Fault – individual / common fault (yellow LED); Inhibit – individual inhibit (yellow LED)
  • Feed:
    • AC mains: 100 – 260 V ac 50/60 Hz external
      DC: 27.6 V
      Battery back-up: external
  • ratify:
    • Low voltage directive – EN61010-1
      RF immunity – EN 50082-1
      RF emissions – EN 50081-1

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