The pressure gauge DMG5 was developed for monitoring overpressure in clean rooms. Differential pressure sensor range +/ -50 Pa or +/ 100 Pa, red LED display, alarm light, signal horn, analog output 0-10V and 4-20 mA for connection to data logger, 2 switch outputs with relays, plus includes, after falling below switch output threshold, A circuit that stores alarm messages when pressure is increased within the normal range. You can reset the alert message by using the red button in the front. The power supply is 24 VAC/DC or 230 AC.