A3 refrigerant detection sensors

DST G290 gas sensors for HVAC and Refrigeration systems

A3 gas detection made easy with the new DST G290 gas detection sensors by Danfoss Sensing Solutions, built with performance and reliability at the forefront.

DST G290 A3 refrigerant detection sensors

DST G290 A3 gas detection sensors with advanced photoacoustic technology are expertly engineered to meet the stringent requirements for A3 refrigerants, such as R290 (propane), perfect for HVAC&R applications where accuracy and reliability are required. Featuring a revolutionary inverted design, which protects the sensor in harsh environments, combined with dew point monitoring and highly selective technology specifically calibrated for R290 you can significantly reduce the risk of false alarms, enhancing the system's reliability.

DST G290 gas sensor (3D/AR)

Features and benefits

Competitive and robust design

Membrane protected from impurities by patented inverted design. Immune to dust, oil and water spray, UV resistant, robust to changes from thermal cycling stress and mechanical stress.
Compliance with IEC and ATEX legislations

IEC 60335-2-40 edition 7 is revised to HP system with A3 refrigerant use regarding the new F-gas regulation, certified by 3rd party laboratory. ATEX compliant signal relay.
Fast and Accurate Leak Detection

Compensated over full range of operating temperature, humidity and pressure ranges with fast response time <30sec and fast warm-up (6 secs).
Eliminate False Alarms

Dew point monitoring, highly selective technology tuned to R290, and acoustic decoupling minimizes risk of false alarms. Robustness towards rapid changes in temperature and humidity.
Immune to Poisoning

No performance degradation from exposure to other gases incl common household chemicals
No field calibration over system's lifetime

Permanent factory calibration. No field adjustments or re-zeroing during 15+ year life.
Minimize “Silent” Failures

Robust “full signal chain” diagnostics check for faults and integrity of signal chain.
Small & easy-fit system integration

Flexible hardware and software to customer’s application specifications.
Production in Europe

Resilient supply chain with localized supplier

Articles

Photoacoustic technology: the key to accurate A3 gas leak detection

This whitepaper describes how photoacoustic technology leverages the unique absorption characteristics of a particular gas to detect its presence and why it was the best choice for Danfoss Sensing Solutions to select it for the DST G290 gas sensor.

Download whitepaper

Applications

The DST G290 A3 Refrigerant detection sensors are designed with focus on:

HVAC

Residential and Commercial Heat Pumps, Rooftops, Air Handling Units (AHU) and A/C Scroll chillers, Transport A/C.
Commercial refrigeration

Food Retail, Food Service, Ice making machines, Cold rooms, Glass Door Dispensers, Chillers, Refrigerators and Freezers, Display cabinets, Transport refrigeration.
Other industries
With applications using A3 refrigerants.

Documents

Documents
Type	Name	Language	Valid for	Updated	Download	File type
Brochure	DST G-series A3 gas sensors brochure	English	Multiple	29 May, 2025	1.5 MB	.pdf
White paper	Photoacoustic technology: the key to accurate A3 gas leak detection	English	Multiple	03 Oct, 2025	795.2 KB	.pdf

Approvals

CE marked
RoHS compliant
IEC 60335-2-40

Highlighted products

DST G290 – A3 refrigerant gas detection sensors for HVAC&R equipment

The latest addition to the DST G-series is the DST G290 A3 refrigerant gas sensor, developed to detect R290 (propane) refrigerant type, perfect for HVAC&R system builders, looking for performance and reliability for their A3 refrigerant compatible systems. These sensors meet the requirements of IEC and ATEX standards for HVAC equipment.

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Commercial ice making machines

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Commercial refrigerators and freezers

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Contact us

If you are interested in our DST G-series gas sensors or any other sensors from Danfoss Sensing Solutions, need expert advice, or wish to explore partnership opportunities, please reach out.

Mark R. Otten

Director of Segment Management and Pricing, Danfoss Sensing Solutions

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