FIELD: measurement technology.
SUBSTANCE: proposed device consists of sensitive element in form of pneumatic plug containing four systems of measuring nozzles arranged in one axial plane, each including two nozzles, one of which is arranged in central part on generating cylindrical surface of pneumatic plug, and second nozzle is located at a distance from central part on diametrically opposite generating surface of plug. Two first systems of measuring nozzles are located in left part of sensitive element, and two second systems are arranged in its right part. Each system of measuring nozzles is connected by communication lines with corresponding pneumatic measuring instrument.
EFFECT: enlarged range of measurements at higher accuracy, no errors caused by position of measuring element in hole to be checked and its shape.
3 cl, 2 dwg
