RB21C RB21T transmitter uses high temperature pressure sensor as sensing element. Sensing element is made up of two diaphragms: titanium alloy pressure sensing diaphragm and titanium alloy pressure measuring diaphragm. The media is transferred onto sensor through pressure sensing diaphragm. RB21T has heat cooling parts. High accuracy amplified circuit board is in stainless steel housing, transmitting sensor signal into standard output signal.