GS300M – 3 Channel Gas Detection Controller

Gas Detection

The GS300M is a 230V three channel and sensor wall or panel mounted gas detection controller. It can be connected to toxic and explosive sensors. An LED display indicates sensor status and faults. The GS300M is compatible with the complete range of Duomo gas sensors.

All Duomo products are manufactured to meet relevant European Normatives and proposals for explosive and toxic gases.

If you require a four sensor controller please see the BX444Mc Gas Controller.

Product Details

  • Three channel protection
  • 230VAC supply
  • Wall or panel mounted
  • Positive safety option
  • Detection of Toxic 0-300ppm / Explosive Gas(es) 0-20%LEL
  • 4-20mA signal sensor input
  • 3 alarm stages - 1st & 2nd pre-alarm and main alarm IP44 protective rating
  • CE certified and approved to EN 61010-1, EN 50270, EN 50271, EN 45544-3, EN 60079-29-1
  • 2 years guarantee - 3 years by registering at

GS300M Product Description

Firstly, the GS300M Gas Detector can be set up to suit requirements using DIP switches:

•Number of sensors from 1 to 3
•Gas type (explosive or toxic)
•Positive Safety Option (on or off)
•Main alarm relay action (latching or auto-reset)

Two LED’s show either battery or a sensor wiring faults. Finally, there are two plug in terminal blocks. One for mains supply and alarm circuit wiring. The second for sensor connections. This reduces the chance of incorrect site wiring.



Onsite Diagnostics

If you require onsite diagnostics or technical assistance with any of our products please give us a call

01905 797989 Contact


We recommend Duomo Gas Detection products are serviced at least annually to ensure efficacy and extend sensor life. Our qualified team of engineers are available Nationwide.


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