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The problems most frequently named by operation maintenance staff with regard to hazardous gases detec-tors (including ammonia) are relatively short gas sensor life cycle, possibility of poisoning, or sensor con-tamination, necessity to carry out frequent checks, cleaning, maintenance and replacement of the sensors.

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The main reason for the industrial accidents resulting from electrostatic discharge are objects isolated from the ground which may accumulate electrostatic charge. In literature they are called isolated conductors. In practice, these are most often metal flanges, connectors or valves on pipelines, drums, containers, hoses, road or railroad tankers, but also people.