Sensirion A2L Refrigerant Sensors
Sensirion A2L Refrigerant Sensors are Refrigerant Detection Systems (RDS) designed for HVACR applications. The Sensirion A2L sensors operate on the thermal conductivity principle and include a dual dry-contact relay output to trigger a blower, shut off the load, or alert a control board. An LED status indicator provides quick visual feedback for easy installation. With fast response times and multi-refrigerant calibration, the devices support A2L refrigerants, making them ideal for residential and commercial systems.
The Sensirion A2L Refrigerant Sensors meet industry standards, like UL60355-2-40, and offer dual calibration for R454B and R32 in HVAC, plus triple calibration for R454A, R454C, and R455A in refrigeration systems.
Features
- Advanced TC technology, refrigeration equipment detects refrigerant leaks quickly and reliably, minimizing false alarms and operational disruptions
- UL compliance meets UL 60335-2-40 ed. 4.0 standards and the upcoming ed. 4.1 standards with self-monitoring capabilities, functioning as a refrigerant sensor or a complete detection system
- Long lifetime operates maintenance-free for over 15 years with factory lifetime calibration and no need for re-zeroing
- Dual color status light provides clear and immediate status indication for installer convenience
- Dual dry-contact relay switch output integrates seamlessly with modern HVAC systems using A2L refrigerants, eliminating the need for an external mitigation board
- RS-485 serial interface enables easy communication and data transmission, along with the relay output, enhancing system testing and design processes
- Wide refrigerant compatibility supports R32, R454A, R454B, R454C, and R455 refrigerants, and is resistant to refrigerant poisoning
- 300-11631-06 A2L sensor cable required (purchase separately)
Applications
- Residential and commercial HVAC systems
- Heat pumps
- Refrigeration equipment
Specifications
- Monitored refrigerants
- R-32, R-454B (dual calibration)
- R-454A, R-454C, R-455A (triple calibration)
- 8-pin sealable connector
- ≤30s response time
- Operating conditions
- -40°F to +185°F (-40°C to +85°C)
- 0 to 100% RH, including condensing environments (maximum dew point of +40°C)
- 800mbar to 1,100mbar
- ±2.5%LFL accuracy at ambient conditions
- 24V AC/DC supply voltage
- RS-485/MODBUS and dual dry-contact relay switch output interface
- Dual dry-contact relay output
- Norm compliance UL 60335-2-40 (4th editions)
- Visual monitoring red/green LED status light
- IP protection IP54, if IP54 rated connector is used
- Expected lifetime >15 years/self-monitored sensor
- Size 3.54" x 2.17" x 0.94" (90mm x 55mm x 24mm)
Videos
Block Diagram
Publicado: 2024-11-01
| Actualizado: 2025-08-27