PRESSURE DETECTOR

PURPOSE:To precisely measure the pressure at the site where the temp. is changed, by immediately correcting the pressure value obtained by a pressure detector by calculation with the use of the temp. simultaneously detected by a temp. sensor provided at the measuring position. CONSTITUTION:A strain gage 3 for pressure detection is stuck on approximately the central part of the outer periphery of a pressure withstanding metallic material 1, and the strain quantity generated in the material 1 due to the variations in pressure is detected. Moreover, the temp. sensor 5 is stuck close to the stain gage 3. Those detection signals are sent to a computing and displaying device 6. At this part, the strain quantity obtained in an electric value is immediately calculated into a pressure value by the computer system, the pressure value is also calculated and corrected based on the temp. information, and the calculated pressure value is immediately displayed on a display part 6a or continuously recorded, if necessary.