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Sunlight R32 & R454 A/B/C

Senseair Sunlight R32 & R454 A/B/C is a high-precision A2L NDIR sensor module engineered for reliable refrigerant leak detection in HVAC systems. Designed to meet the demands of North American markets, it complies with IEC 60079-29-1 and IEC/UL 60335-2-40 standards for HC-R applications.

Featuring an optical solid-state design with an LED light source and photodiode detection, the sensor is immune to poisoning and resistant to vibrations. Its Automatic Baseline Correction (ABC) function guarantees accuracy over a 15‑year lifespan. In addition to R32, the sensor supports individually specified refrigerants R454A, R454B, and R454C of the A2L class.

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

We at Senseair believe in quality and accuracy. When it comes to gas measurements, you want a sensor that you can always trust – without the need for maintenance. Equipped with a self-correcting algorithm (ABC: Automatic Baseline Correction), you can mount your Sunlight sensor and then leave it alone for 15+ years while maintaining a dependable system. Our Sunlight sensors are optimized for battery and wireless applications, or in places where you need a reliable and secure sensor with a long life.

Senseair’s Sunlight R32 can be used in a wide range of refrigerant applications. Using LED as the light source and a photodiode in the sensor section ensures highly safe operation of equipment that uses a mildly flammable refrigerant (R32).

Article number	009-4-0001
Operating principle	Non-dispersive infrared (NDIR)
Measured gas	R32, R454 A/B/C
Measurement range	0–50 LFL
Accuracy	±2.5% LFL
Operation conditions	-40 – 70 °C, 0 – 95% RH
Warm-up time	0s
Response time	<12s
Power supply	3.05 - 5.5 V
Peak current	94 mA
Average current	1-94μA
Communication	I2C, UART
Outputs	Digital
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
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
009-4-0001	Sunlight R32 & R454 A/B/C	Refrigerant sensor with fast response time and long lifetime.
009-4-0002	Sunlight R290	Refrigerant sensor with fast response time and long lifetime.
006-1-0100	Sunlight CO₂	An extremely power efficient CO₂ sensor.