Description
The Johnson Controls GM203-MH00 is a next-generation A2L refrigerant leak detection sensor engineered specifically for R454C — a low-GWP, mildly flammable (A2L-classified) refrigerant increasingly used in modern commercial refrigeration and HVAC systems. Designed to meet the growing demand for safety compliance in A2L refrigerant environments, this sensor delivers reliable, continuous monitoring with seamless integration into building automation and control networks.
Key Features
- Designed for A2L refrigerant detection — optimized for R454C leak monitoring
- RS485 Modbus output for easy integration with BAS, DDC, and building automation systems
- 24V operating voltage for compatibility with standard commercial HVAC control circuits
- 2 ft cable with male connector for straightforward field installation and wiring
- Supports proactive leak detection to help meet ASHRAE 15, UL, and local safety code requirements
- Compact sensor design suitable for installation in equipment rooms, mechanical spaces, and refrigerated enclosures
A2L Refrigerant Safety
As the HVAC and refrigeration industry transitions to lower-GWP refrigerants, A2L refrigerants like R454C require dedicated leak detection solutions. The GM203-MH00 provides the continuous monitoring needed to detect refrigerant concentrations before they reach hazardous levels, helping protect personnel, equipment, and facilities.
BAS & Controls Integration
The RS485 Modbus communication output allows the GM203-MH00 to report refrigerant concentration data directly to a building automation system or dedicated refrigerant controller. This enables centralized monitoring, alarm management, and data logging — all critical for facilities managing multiple refrigerant circuits.
Specifications
- Model: GM203-MH00
- Brand: Johnson Controls
- Target Refrigerant: R454C (A2L)
- Output Type: RS485 Modbus
- Supply Voltage: 24V
- Cable Length: 2 ft
- Connector: Male connector included
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