Patent ID: 7275444

Claim:
A pressure transducer apparatus, comprising: a pressure transducer header of a cylindrical shape and having closed front and back surfaces, with said front surface having a main pressure port opening, said opening extending from said front surface towards said back surface, said back surface having a pressure die accommodating opening therein which opening communicates with said pressure port opening, and a differential pressure port opening on a side surface of said pressure transducer header, a bore having an opening in said back surface and extending towards said front surface, with said differential pressure port communicating with said bore, a die accommodating header having a top surface and a rear surface, said header of a shape corresponding to the shape of said pressure die accommodating opening said die accommodating header to be inserted therein, said die header having a first set of terminal apertures on said top surface extending to said rear surface, a second set of terminal apertures on said top surface of said die header also extending to said rear surface, said second set of terminals surrounding a differential pressure port opening which opening extends from said top surface to said rear surface, terminal pins inserted into said terminal apertures to extend from said top surface and directed to said rear surface and to extend beyond said rear surface, a first pressure transducer die positioned on said top surface of said die header and connected to said first set of terminal pins, a second pressure transducer die positioned on said top surface of said die header and connected to said second set of terminals, each of said pressure transducer dies having a deflectable diaphragm having located thereon pressure responsive sensors, which vary resistance according to an applied pressure, a differential pressure tube extending from said bore opening in said back surface of said pressure transducer header to said differential port opening of said die header, wherein when a first pressure is applied to said main pressure port opening both said first and second pressure transducer die receive said first pressure, and when a second pressure is applied to said differential port only said second pressure transducer receives said pressure, so that said first pressure transducer provides an output indicative of the absolute value of said first pressure with said second transducer providing an output indicative of the difference between said first pressure and said differential pressure.