JPS571938A - Measuring apparatus for temperature - Google Patents

Abstract

PURPOSE:To prevent a fluid to be measured from flowing into the sensor-protecting body and enable a sensor to be mounted and dismounted without stopping the operation and without removing the running water flow at the measuring part, by employing a sensor-protecting body having a double structure, and making the outer and inner tubes move relatively to each other. CONSTITUTION:The inner tube 42 is axially movably inserted into the outer tube 40 by means of a screw 44. A water-introducing hole 46 is provided at the end of the outer tube 40. Water-introducing holes 48 are provoded in the side wall of the inner tube 42. Inside the inner tube 42, a temperature-measuring sensor 52 is inserted. When temperature is measured, with the sensor 52 inserted inside the inner tube 42, the inner tube 42 is relatively moved toward the side of the remoter surface 68 from the running water by means of the screw 44 so that the end of the inner tube 42 separates from the water-introducing hole 46 in the outer tube 40. Thereby, the water to be measured passes through the water-introducing hole 44, an air gap 50 and the water-introducing holes 48 and reaches the sensor 52.