Multi-Zone Gas Leak Monitor

  • Monitors up to 16 remote areas, expandable to 48 points
  • Proprietary Infrared (NDIR) sensing technology
  • Low detection limits (as low as 1 ppm)
  • Long sampling distances (up to 1,200 ft / 365 m)
  • On-board visual/audible alarms, 4 relay contacts mitigates refrigerant loss


Bacharach's Multi-Zone gas monitor offers superior performance, flexibility and functionality for low level continuous monitoring of refrigerants, carbon dioxide and ammonia. The 10 inch / 250 mm infrared sensor enables the Multi-Zone to accurately measure lowest ppm levels. A built-in library of over 50 gases and the scalability of the number of zones facilitate customization of the system. The large graphic LCD display and status LEDs provide a system-wide overview at one glimpse.


The Multi-Zone is not only a leak detection system, but enables refrigerant management of e.g. a whole supermarket. The sooner a loss of refrigerant is detected, the earlier countermeasures can be initiated, resulting in smaller recharge quantities of refrigerants. With the on-board relays and the optional Remote Display, the Multi-Zone fulfills the regulatory requirements as a refrigerant detection system. Using the Modbus interface or analog output, the monitor can be integrated into any BMS/BAS system.


Type 4 to 16 point sampling system using IR sensor technology
Gases Refrigerants:                   CFCS, HFCS, HCFCS, HFOS

Natural Refrigerants:        Ammonia, Carbon Dioxide
Measuring Range * Refrigerants 0 to 10,000 ppm
Ammonia 25 to 10,000 ppm
Carbon Dioxide 300 to 8,000 ppm 
Sensitivity * Refrigerants:                     1 ppm
Ammonia:                       25 ppm
Carbon Dioxide:               10 ppm
Sampling Distance 0 to 1,200 ft. (0 to 365 m) for each sampling point
Display Backlit, graphic LCD 160 x 128 pixel; three status LEDs
Output Digital                             Modbus® RTU via RS 485
Analog                            4 to 20 mA (optional)
Power Supply 100 to 240 VAC, 50 / 60 Hz
Relay 3 alarm relays, 1 fault relay, SPDT
Rating 5 A @ 250 VAC, resistive load
Ambient Conditions Temperature                    32 to +122 °F (0 to +50 °C)
Humidity                          5 to 90 %RH, non condensing
Altitude                            0 to 6,560 ft (2,000 m)
Enclosure Powder-coated aluminum
Size (w x h x d) Approx. 13.7” x 12.3” x 5” (350 x 315 x 130 mm)
Weight Approx. 15 lbs. (6.8 kg)
Approvals CE, UL, CSA, EN 61010-1, EN 61326, EN 14624

 * See data sheet for details

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