Pressure and temperature sensing device

Claim 1

In a device for simultaneously sensing pressure and temperature of a test apparatus, an elongated case having a lower end, means for connecting the lower end of the case to the test apparatus, a measuring tube extending downwardly within the case, the measuring tube having a lower portion in contact with the lower end of the case and terminating flush with the lower end of the case, the measuring tube having a central portion disposed above the lower portion thereof and spaced from the case, and active strain gauge winding disposed on the central portion of the measuring tube, a protecting tube extending downwardly within the case and having a lower portion disposed within and spaced from the lower portion of the measuring tube, the lower end of the protecting tube terminating in alignment with the lower end of the measuring tube to define, between the lower portions of the measuring tube and the protecting tube, a gap providing open and unobstructed communication between the interior of the test apparatus and the central portion of the measuring tube, a compensating strain gauge winding disposed on an upper portion of the protecting tube, and sensing means disposed inside and in contact with the protecting tube for detecting the temperature of the test apparatus when the lower end of the case is connected thereto.