NG # 09440004-HW-SENSIRION-004
SGD43S-M3-S5 Refrigerant Leakage Sensor is a complete A2L refrigerant leakage detection system designed for HVACR applications. It uses thermal conductivity sensing to detect R-32 and R-454B, with dual calibration, dual relay output, RS-485/MODBUS communication, and visual LED status indication.
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Get A QuoteSensirion SGD43S-M3-S5 provides reliable refrigerant leak detection for residential and commercial HVACR systems. Designed for R-32 and R-454B, it offers ±2.5% LFL accuracy at ambient conditions and a response time of up to 30 seconds. The system operates on 24 V AC/DC and provides RS-485/MODBUS, dual-contact relay outputs, and red/green LED status indication. Its robust thermal conductivity sensing principle helps resist contamination and supports long-term, self-monitored operation.
Type: A2L Refrigerant Leakage Detection System
Refrigerants: R-32, R-454B
Detection Principle: Thermal Conductivity
Accuracy: ±2.5% LFL
Response Time: ≤30 s
Supply Voltage: 24 V AC/DC
Communication: RS-485 / Modbus
Relay Output: Dual Dry-Contact Relay
Connector: 8-Pin Sealable
Operating Temperature: -40 to +85°C
Humidity: 0–100% RH, Condensing
Protection: IP54 with IP54-rated connector
Expected Lifetime: >15 years
Dimensions: 90 × 55 × 24 mm
Compliance: UL 60335-2-40, UL 60335-2-89
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