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SGM595 – Methane Gas Sensor

Introducing the SGM595 – Methane Gas Sensor, one of Duomo’s best-selling gas sensors. This particular sensor is designed for detecting methane gas, also known as CH4. If you require a sensor for LPG gas instead, we recommend checking out the SGM595 LPG Gas Sensor. Regardless of which gas you need to detect, this sensor is fully compatible with the complete range of Duomo conventional gas controllers, ensuring seamless integration with your existing system. With its reliable performance and ease of use, the SGM595 is a top choice for anyone in need of a quality methane gas sensor.

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Quantity 1 - 4 5 - 9 10 - 19 20+
Price £130.00 £123.50 £117.00 £110.50



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The SGM595 Methane Gas Sensor is the gas sensor used with the complete range of Duomo conventional detector panels.

This is the Methane CH4 version of the SGM595. For the Methane CH4 (Natural Gas) see SGM595 LPG Gas Sensor

We have installed and commissioned natural gas and carbon monoxide sensors for applications such as:

  • Boiler rooms
  • Kitchens
  • Car parks
  • Aircraft hangers
  • Factories
  • Shopping centres

The SGM595 is an easy to install product. It sends signals back to the Duomo gas detector panel that powers it. Then, the gas detector interprets the signal and can sound alarms whilst turning off gas supplies to the protected area. As a result, a gas cannot escape into the atmosphere.

Because of its automatic drift compensation feature, the SGM595 is now one of our most popular gas sensors. To ensure efficacy and extend sensor life, Duomo recommend servicing at a minimum of every 12 months.

We manufacture all Duomo products to meet relevant European standards and proposals for explosive and toxic gases. The gas industry recognise Duomo for providing a comprehensive range of low cost, high reliability gas detection for many applications.

This Methane Natural Gas Sensor is compatible with complete Duomo conventional Gas detection range.


Product Details

  • Methane CH4 (Natural Gas) Target Gas
  • 4-20mA output signal
  • Auto calibration
  • Sintered head
  • Catalytic sensor technology
  • Sensor active indicator
  • Compatible with GS100M, GS300M, GS300Mc, BX444Mc, BX150 & BX316
  • IP55 enclosure
  • Designed to EN50194
  • 3 year guarantee


Onsite Diagnostics

If you require onsite diagnostics or technical assistance with any of our products please contact us

  • This field is for validation purposes and should be left unchanged.


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.



  • SGM595 Wiring Diagram

    84.84 KB | pdf

  • SGM595 BIM File

    151.33 KB | zip

  • SGM595 Natural Gas sensor Data sheet

    2.30 MB | pdf



Can I use the SGM595 Sensor for both Methane and LPG simultaneously?

No, the SGM595 sensor must be set up to detect either Methane or LPG at any given time. It’s calibrated for one type of gas to ensure accurate measurements and performance.

This is the Methane version not the SGM595 LPG version.

What is the expected lifespan of a SGM595?

We recommend that the SGM595 Sensor is replaced every 5 years to ensure protection and accuracy and reaction times

Where should I install my sensor?

Natural Gas is lighter than air and the SGM595 should be mounted 30cm from the highest point from ceiling of the protected area.

The sensor should be mounted in accordance with certain considerations. Do not position next to burners, heaters or ovens where temperatures above the room ambient may be experienced. It is, if possible, better to mount the sensors on the opposite wall. This is, of course, dependant on the size of the protected area.


How do I replace the SGM595 sensor?

When replacing sensors never separate the SGM595 sensor head from its PCB. The sensor is calibrated using the original PCB board and will not function correctly with any other. The complete sensor is replaced and should be replaced every 5 years.

The sensor isn't powering up, what is wrong?

Check that the 12/24 VDC power is present, and that positive and negative polarity has not been


Support & Service

If you require technical assistance or an annual service on this product please contact us and we will be happy to help. Our qualified team of engineers are available Nationwide.

Duomo (UK) Ltd

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