Description
Bacharach 6203-0012 – MVR-300 Refrigerant Detector, R-407c, 0 to 5000 ppm

MVR-300 refrigerant detector
- Detects R-407c, 0 to 5000 ppm
- Continually communicates system, sensor and alarm status
- Unique unit identifier can be tied to HVAC control system
The Bacharach MVR-300 detector is specifically designed to provide continuous monitoring for refrigerants associated with high-efficiency, high volume refrigerant cooling and heating systems, such as VRF/VRV (Variable Refrigerant Flow/Variable Refrigerant Volume) systems. Typical applications include hotels, dormitories, hospitals, office buildings, and apartment buildings.
The MVR-300 audible and visual alarms alert occupants and simultaneously communicate to Building Management Systems/Building Automation Systems (BMS/BAS). Two on-board relays can be used to close valves, activate alarm devices and exhaust fans or initiate emergency calls to rescue teams.
The on-board Modbus RTU interface provides real-time information about concentrations, status and settings. It also enables custom configuration of the MVR-300 to any application specific requirements using multiple Modbus registers.
The MVR-300 is designed for easy installation and simple maintenance.
IMPORTANT NOTE:Large refrigerant leaks into occupied spaces can reach concentrations that pose a suffocation risk to the occupants. The MVR-300 is not designed to be used as the sole safety device for this risk. Safety of the occupants also must take a system designed approach that includes things such as ventilation, detection, early warning, mitigation and design redundancy.
THE COMPLETE SOLUTION for Refrigerant Detection in Occupied Spaces

Easy to Install
Fits standard electrical boxes globally. Configured through easily accessible switches or programmable Modbus communication interface.
Low Profile, Neutral Design
MVR-300 design includes a color neutral, low profile faceplate with programmable magnetic switches for a clean, tamper proof, button free look, blending easily into any decor.
Alarm Management
High and low alarm set points are factory preset. Corresponding high and low relay states are programmable, as well as, silent alarm, reset and delay.
Communication & Self Diagnostics
Through relays or Modbus communication and the faceplate tri-colored LED, the MVR-300 continually communicates system, sensor and alarm status. A unique unit identifier can be tied to the HVAC control system identifying zone/location. Each unit’s alarms and relays can be configured remotely through Modbus or directly with magnetic wand activated switches.

Trouble Free Calibration
All gas detectors require periodic field testing and calibration. The MVR-300 offers an easy field calibration design and an exclusive plug-in field replaceable pre-calibrated sensor option.
Safety and the Environment
MVR-300 enables a comprehensive approach to refrigerant leak management ensuring comfort and safety for the occupants, while reducing the environmental impact of HFC refrigerants.
The Bacharach MVR-300 is available for detection of four refrigerants and in several concentration levels. The following is an overview of available models:
| Refrigerant | P/N | Low Alarm* | High Alarm* | Range |
| R-410A | 6203-0001 6203-0002 6203-0003 | 500 ppm 1,000 ppm 2,000 ppm | 2,000 ppm 2,000 ppm 4,000 ppm | 2,500 ppm 5,000 ppm 10,000 ppm |
| R-407C | 6203-0011 6203-0012 6203-0013 | 500 ppm 1,000 ppm 2,000 ppm | 2,000 ppm 2,000 ppm 4,000 ppm | 2,500 ppm 5,000 ppm 10,000 ppm |
| R-404A | 6203-0021 6203-0022 6203-0023 | 500 ppm 1,000 ppm 2,000 ppm | 2,000 ppm 2,000 ppm 4,000 ppm | 2,500 ppm 5,000 ppm 10,000 ppm |
| R-32 | 6203-0041 6203-0042 6203-0043 | 500 ppm 1,000 ppm 2,000 ppm | 2,000 ppm 2,000 ppm 4,000 ppm | 2,500 ppm 5,000 ppm 10,000 ppm |
*Factory default; can be changed through Modbus. Recommended 6 month testing and calibration.
Gas Detection/Multi Zone Detector Template | |
|---|---|
| Application (Gas Detection) | Refrigerant |
| Gas Selection | R-407C |
| Maximum PPM | 5000 PPM |
Product General Attributes | |
| Unique Features | MVR-300, R-407C, 0 to 5000 ppm |
| Warranty | 1 YEARS |
| Safety Approval | CE, CSA, IECEx, UL |
| Product Weight | 230 GRAMS (0.5071 LBS) |
| Product Height | 1.75 IN |
| Product Length | 6 IN |
| Product Width | 4.1 IN |
| Shipping Weight | 1 LBS |
| Country of Origin | United States |








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