MZ - a multi-point system for the detection of gas taken by hoses from distant measurement points

The refrigerant monitoring system features a unique combination of high sensitivity, a wide range of measurement and gas response rates. Tthe detection system with infrared technology is a great solution adapting to the client's expectations, giving the possibility of remote communication and visualization, centralized reporting and management. Continuous monitoring of the gas leak is the basis for the detection of harmful gases.

Used primarily for the detection of refrigerants from the hydrofluoric group, carbon dioxide and ammonia, this modern system protects industries in term of efficiency, quality, minimization of cost loss and the integrity of the surveillance system. A low level of detection is extremely important when leaks are small, thus preventing and alerting to take immediate corrective action to minimize energy and refrigerant losses.

The system is compliant with the ASHRAE 15-2007 standard, ETL - supports regulations in the field of energy efficiency, has the EN 14624 and CE certification.

The idea of the system is to suck gas through the built-in suction pump sequentially from distant points to the gas sensor.
The response rate to a gas leak depends on the length of each hose used and the number of attached measuring points (hoses). The gas flow in the hose is about 1 m / s, which determines the time of inflow of the leak to the gas sensor.
Using a splitter, it is possible to duplicate measurement points on one hose and simultaneously monitor two or three critical points nearby on the refrigeration plant.

The MZ control panel is available in versions 4, 8, 12, 16 measuring inputs. An additional monitor can be connected to the control panel on the distance up to 1000m, thus improving the ergonomics of the system. The MZ control panel can be combined into a cascade system, which makes it possible to monitor a very large number of potential gas leak points.

An example of system assembly in a machine room.



The Multi-Zone enhances effective refrigerant management, detecting leaks early to enable cost savings by reducing refrigerant recharge, enhancing energy efficiency and reducing risk of refrigeration failure and produce loss. A variety of communication interfaces are available including Modbus, BACnet and LonWorks, allowing easy integration into BMS/BAS systems and remote monitoring solutions.







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



CO2 H1211 R-12 R-404A R-500
FA188 H1233ZD R-123 R-407A R-502
FC72 H1234YF R-124 R-407C R-503
H1234ZE R-125 R-407F R-507
H1301 R-134a R-408A R-508B
H2402 R-21 R-409A R-513A
HFP R-22 R-410A R-514A
N1230 R-227 R-422A
N4710 R-23 R-422D
N7100 R-236fa R-424A
N7200 R-245fa R-426A
N7300 R-32 R-427A
N7600 R-438A
NH3 R-448A




Multi-Zone Brochure
Multi-Zone Manual
Multi-Zone Remote Monitor
Multi-Zone Declaration of Conformity
Multi-Zone List of Accessories and Parts
Multi-Zone Guick Guide before Installation
Multi-Zone Specification