Closed ion source gas analyzers

04/01/1998

Differential pressure transmitter

Model C230 high-output, low differential pressure transmitter, designed for wet/wet differential pressure measurements of gases and liquids, has been enhanced to offer pressure ranges from 0-1 psid to 0-100 psid with gases or liquids on both sides. The transmitter contains a fast-response capacitance sensor and an ASIC-based signal conditioning circuit, necessary to provide an accurate linear analog output proportional to pressure. Responding to pressure changes some 20 times faster than conventional fluid-filled transmitters, the C230 is available with uni-directional and bi-directional pressure ranges for applications with line pressure up to 250 psig. Its isolation system transmits the motion of the differential pressure sensing diaphragm from the high line pressure environment to the dry enclosure, where it moves one of a pair of capacitance plates proportionally to the diaphragm movement. Setra Systems Inc., Boxborough, MA; ph 800/257-3872, fax 508/264-0292,

e-mail [email protected], www.setra.com