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Sunlight R290

Senseair Sunlight R290 is a robust NDIR sensor module engineered for demanding environments where vibration resistance and explosion safety are paramount. Utilizing a solid-state, LED-based design, it delivers high precision and low power consumption—ideal for applications using low GWP A3 class refrigerant R290 (propane).

Manufactured for high volume production, every sensor is individually calibrated and each component and manufacturing step is fully traceable via serial number, ensuring consistent quality. Integrated with UART (Modbus) and I2C interfaces and equipped with the self-correcting ABC (Automatic Baseline Correction) function, the sensor remains maintenance free over at least a 15‑year lifespan.

Defining attributes

Complies with IEC 60079-29-1
Complies with sensor element part at IEC and UL 60335-2-40
Miniature size
Fast response time
Maintenance-free
Long term stability
Long lifetime
Immunity to poisoning
Individually calibrated
Very low power consumption
Mass production

Engineered with a robust, easily integrated module design and standardized interfaces, the Sunlight R290 ensures seamless integration into end products—even for harsh environments. Optimized for a wide range of refrigerant applications, it leverages LED and photodiode technology for safe operation in systems using flammable R290.

Article number	009-4-0002
Operating principle	Non-dispersive infrared (NDIR)
Measured gas	R290
Measurement range	0–100% LFL
Accuracy	±2.5% LFL
Operation conditions	-40 – 70 °C, 0 – 95% RH (non-condensing)
Power supply	3.05 – 5.50 VDC
Peak current	94 mA
Average current	1-94μA
Communication	I2C, UART
Compliance	IEC 60079-29-1, IEC 60335-2-40 Ed.7, UL 60335-2-40 Ed.4
Maintenance	Periodic Zero calibration or ABC calibration
Life expectancy	15 years in normal commercial environments
Dimensions	34 x 21 x 12 mm (L x W x H)
Weight	5 g
Storage conditions	-40 - 85 °C

Disclaimer : Please refer to product specification for the complete technical details.

Article number	Product	Description
009-4-0002	Sunlight R290	Refrigerant sensor with fast response time and long lifetime.
009-4-0001	Sunlight R32 & R454 A/B/C	Refrigerant sensor with fast response time and long lifetime.
006-1-0100	Sunlight CO₂	An extremely power efficient CO₂ sensor.