To be able to detect ammonia leaks reliably, the selective measurement in the secondary circuit is essential. The MiniCal III system already detects at low concentrations selectively (0.2 ppm), whether in normal water, in cycles or in brine mixtures such as ethylene glycol, propylene glycol, TYFOXIT, Pekasol, etc.
A basic distinction between the detection in water cycles and water/brine cycles is made. In both cases, electrodes with selective membranes are used. Through the reaction of ammonia with the cooling medium, however, the ammonia detection is performed with either an ion-selective or a gas-sensitive ammonia electrode depending on the medium and pH thus resulting in an absolutely reliable statement on the ammonia leak.
Refrigeration systems with freons, R22, R134a, R404a, R407c etc. HFCs, HCFCs can also be monitored reliably with other specific sensors (electronic measuring elements) in the circuit.
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