Sensirion

Category: Sensors

Air Quality Sensors A2L Sensor, R-454A/R-454C/R-455A 8 Pin, 24V, RS485, Relay

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

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)

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