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RDS R32 & R454 A/B/C

The Senseair Refrigerant Detection System R32 & R454 A/B/C is an enclosed leak detection sensor module for HVAC applications using the low GWP A2L class refrigerant R32 and R454A, R454B and R454C. It is engineered for precise, reliable detection in very demanding environments and ease of installation.

Defining attributes

Fast response time
High accuracy
Wide temperature range
Maintenance-free
Compliant with IEC & UL 60335-2-40
Factory calibrated
Long term stability
Long lifetime
Immunity to poisoning
LED-based light source

Engineered with a standardized connector pinout and robust IP66 and IP67 enclosure, the RDS R32 & R454 A/B/C offers flexible power supply options and multiple output configurations—simplifying installation and integration into diverse systems.

A protective housing with a high-quality gas diffusion vent safeguards the sensor element from dust and condensation. Thanks to the built-in heating element, the RDS R32 & R454 A/B/C can operate in cold environments. Using Modbus protocol, the measured data is digitally transmitted to the control system. A digital output signal is activated when the gas concentration reaches a configurable threshold, and the output can be set as a digital PWM signal or an analogue linear output reflecting the measured concentration.

Article number	009-3-0007
Operating principle	Non-dispersive infrared (NDIR)
Measured gas	R32, R454 A/B/C
Measurement range	0-50% LFL
Accuracy	±2.5% LFL
Operation range °C	-40 - 70 °C
Response time	<30s
Power supply	5 VDC/12 VDC/24 VAC/DC
Communication	Modbus over RS-485
Outputs	Digital signal (High/Low or PWM) or Analogue voltage or Analogue current
Compliance	IEC 60335-2-40 Ed.7, UL 60335-2-40 Ed.4
Maintenance	Maintenance-free
Life expectancy	>15 years
Dimensions	113 x 65 x 40 mm (L x W x H)
Storage conditions	-40 - 85 °C

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

Article number	Product	Description
009-3-0007	RDS R32 & R454 A/B/C	The Senseair Refrigerant Detection System 24V configured for R32 & R454 A/B/C.
009-3-0008	RDS R32 & R454 A/B/C	The Senseair Refrigerant Detection System 12V configured for R32 & R454 A/B/C.
009-3-0009	RDS R32 & R454 A/B/C	The Senseair Refrigerant Detection System 5V configured for R32 & R454 A/B/C.
009-3-0010	RDS R290	The Senseair Refrigerant Detection System 24V configured for R290.
009-3-0011	RDS R290	The Senseair Refrigerant Detection System 12V configured for R290.
009-3-0012	RDS R290	The Senseair Refrigerant Detection System 5V configured for R290.