SZ - a single-point system for the detection of gas taken by hose from distant measurement point

The refrigerant monitoring system features a unique combination of high sensitivity, a wide range of measurement and gas response rates. Using infrared technology, the detection system 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.

Single-Zone Monitor is 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 costs loss and integrity of the supervision system. A low level of detection is extremely important at a time when leaks are small, thus protecting the target system and alerting you 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 from a remote point to the gas sensor.
The response rate to a gas leak depends on the length of used hose. 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 simultaneously monitor two or three critical points on the refrigeration system.



If you want to monitor a greater number of critical points in the cooling or freezing system, read the Multi-Zone systems.



Type Single point sampling system using proprietary IR sensor
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 500 ft (0 to 150 m)
Display Backlit graphic LCD, three status LEDs
Output 4 to 20 mA
Power Supply 100 to 240 VAC, 50 / 60 Hz
Relays 3 alarm relays, 1 fault relay, SPDT
Rating 3 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 housing
Size (w x h x d) Approx. 13.7” x 7.7” x 3.6” (350 x 195 x 95 mm)
Weight Approx. 7 lbs. (3.2 kg)
Approvals CE, UL, CSA, EN 61010-1, EN 14624



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




Single-Zone DataSheet
Single-Zone Manual
Single-Zone Spliter Mountage
Single-Zone Declaration of Conformity