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.
Cooling systems with ammonia as coolant need to be continuously monitored for leaks for long-term security of investments as well as for open systems to comply with the environmental standards. Ammonia is one of the most widely used refrigerants. However, it has a strong irritant and corrosive effect. In systems, ammonia reacts aggressively and this reaction quite often results in leaks for instance in copper lines. In order to avoid damage and not to endanger production processes, ammonia leaks must be detected early, hence, allowing time for elimination. For this purpose, devices for ammonia detection were integrated in the secondary cooling circuit. The MiniCal III system was specifically developed for this purpose. With the help of intensive cooperation with operators of refrigeration systems and due to extensive experiences, a powerful and user-oriented system could be designed which is fast and easy to install.