In ships and diesel locomotives, but also carnival rides (e.g., roller coasters), pressures and temperatures must be monitored. Thus, pressure switches and transmitters can be used to monitor shafts, the tank level, as well as the hydraulic and pneumatic control. Coolants in electrical generators and auxiliary systems must be monitored.
Bilge pumps, hydraulic lifts, pumps, and freshwater tanks must be monitored on the pressure side. Certified pressure monitors are used in particular to monitor the brakes in carnival rides.