DGS GAS Detector FAQ


The Danfoss range of gas sensors and controllers protects human beings and systems in situations where toxic gases are used.

With the help of modern communication technology, fast alerting and reliable sensors, a quick reaction is possible in the event of gas leaks.

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Getting started

This guide describes step by step how to quickly set up the DGS Gas Detector.

Download the complete guide

Sensor Calibration

Calibration certificate

The sensor calibration certificate is normally included in the installation pack.

If you lose this certificate, you can request it from your sales representative by providing:

Code number, Serial Number and Manufactured date printed on the sensor head.


Calibration period

When the DGS is provided, the sensor is already calibrated from the factory side.

The sensor has then to be re-calibrated depending on the gas used in the application.

Following the period recorded in the sensor head:

  • 60 months for CO2 infrared sensor
  • 12 months for HFC semiconductor sensor
  • 6 months for Propane pellistor sensor

Sensor recalibration

Yes, when the calibration expires there are 2 possible options:

  • Replace the sensor head
  • Re-calibrate the sensor. This operation resets the calibration period counter recorded in the sensor head.
  • Link to calibration guide
  • For the re-calibration procedure, please take a look at the below video:
Digital Ammonia Gas Detector

In this video, we will see how to calibrate the DGS.

DGS Gain Calibration

In this video, we will see how to make zero calibration in the DGS.

DGS Zero Calibration

Sensor life span

Life expectancy

Typical sensor lifespan:

  • Infrared (CO2) – 5-7 years
  • Electrochemical (NH3) – 2-3 years
  • Semiconductor (refrigerants) – 5-7 years

Propane sensor


No, the DGS for propane can only be used in a non-ATEX zone.