In order to monitor differential pressures in clean rooms, defined as a room in which the concentration of airborne particles is maintained within established parameters, ALVI offers a differential pressure transmitter; the DE21.
It is a compact, DIN Rail Mounted measuring instrument in 2-wire technology, serving to cover numerous measuring ranges in the low pressure area. Using capacitive measuring cells specially designed for nominal pressure ranges along with high overpressure safety, monitor ensures high precision, long term stability and drift free operation.
The measurement units, mbar, Pa, kPa and inWC, are selectable via the DIP Switch on the unit. It’s equipped with the 4 digit LCD display clearly indicating the measured differential pressure in selected pressure units.
Differential pressure is simply the measured pressure deviation between two points in different pressure systems.
If the pressure is too low, especially when a door is opened, contaminants can enter. If it is too high, energy is being wasted.