GfG Refrigerant Sensor Transmitter

Protect HVAC systems, refrigeration plant, and mechanical services with reliable gas detection designed for modern building environments. The CS22D fixed gas transmitter provides continuous monitoring of refrigerants and toxic gases—supporting compliance, safety, and operational continuity in plant rooms.

From commercial buildings and supermarkets to hospitals and industrial facilities, the CS22D delivers a practical, cost-effective solution where refrigerant leak detection and integrated building control are critical.

Product Description
The GfG CS22D gas transmitter is a versatile fixed detection solution engineered for continuous monitoring of refrigerants, toxic gases, and flammable vapours in non-hazardous (non-Ex) environments such as HVAC plant rooms and refrigeration systems.

Using chemisorption (CS) sensor technology, the CS22D provides stable and accurate detection across a wide range of gases including ammonia (R717), methane, and common refrigerants such as R134a, R410A, and R404A—making it ideal for modern building services and cold storage applications.

Optimised for HVAC & Refrigeration Systems
The CS22D is purpose-built for integration into BMS, PLC, and gas safety systems, offering both analog (4–20 mA / 0.2–1 mA) and digital (RS-485 Modbus) outputs. This flexibility allows seamless connection into new builds or retrofit projects across commercial and industrial facilities.

It is particularly suited to:

A clear 2.2” colour display provides real-time gas concentration and system status directly at the sensor location. In alarm conditions, the display illuminates red and an integrated audible buzzer alerts personnel immediately—supporting rapid response to refrigerant leaks.

Accurate, Reliable, and Low Maintenance
The CS22D is engineered for dependable long-term operation with:

Housed in a compact IP54-rated enclosure, the CS22D is designed for installation in plant rooms and service areas, with optional weather protection available for more demanding conditions.

The device also meets SIL functional safety standards, supporting use in safety-critical building applications.

Key Features

Typical Applications