Series DE 90 — multifunction low differential pressure transmitters

• Δp measurement from 0.25 mbar to 0-250 mbar • For neutral gases • 4-20 mA, 0-10 V output • 2 configurable PNP contacts • ATEX versions, zones 2-22 The CITEC DE 90 series differential pressure transmitters are intended for industrial applications and were developed specifically for monitoring filters, extraction systems, clean room ventilation and other fields working at very low pressures. Two ATEX versions complete the range for applications in zone 2 (gas) or zone 22 (dust). The operating principle is based on a piezoresistive sensor suited to measuring pressure, vacuum and differential pressure. The whole works with a microcontroller that takes the difference between the 2 measured pressures and converts it into a standardised signal, a display reading or a relay output, as required. The product indicates the P+ and P- pressures as well as the Δp.