SSW77B series SMART differential pressure switches are microprocessor-based instruments with an ON/OFF output signal. They can be remotely configured by a universal hand held terminal (HHT) or by a PC with a dedicated interface.
Moreover, it is possible to locally configure the instruments (zero and span) by means of 2 pushbuttons and to display the data on the display.
The SSW77B switches measure differential pressure with spans from 1,2 to 20000 mbar with a static pressure up to 200 bar. The pressure measuring element is a piezoresistive sensor. It is possible to choose a variety of sensors to satisfy all process conditions.
The Spriano measuring cell contains the sensor and transmits pressure to the electronics. Thermal drift is compensated using the temperature signal generated by a PTC thermistor integrated in the sensor itself. Based on these readings the microprocessor shows the measurement on the display and command an ON/OFF signal output contact, depending by a set threshold.