Devices for monitoring the gas contamination of the air of the working area with ammonia

The control of the ammonia content in the air of the premises of ammonia refrigeration units is a prerequisite for their safe operation. For this, semiconductor and electrochemical detection methods are usually used.
Semiconductor devices are quite cheap, but they can become inoperable after exposure to high concentrations of ammonia and do not have long-term stability. Therefore, such devices serve mainly to detect ammonia leaks.
In order to measure the concentration of ammonia, electrochemical gas analyzers (or gas detectors) are used, which have high reliability and, which is very important, a long (at least 6 months) calibration interval.