PURPOSE: To obtain the titled sensor as the sensor for a current meter, a temperature-measuring resistor or a sensor for compensation of temperature, which enables the accurate and rapid measurement of temperature or speed of current for a long time without the possibility of lowering of the precision in measurement, by fitting ceramic covers molded beforehand to the open ends of a ceramic tube.

CONSTITUTION: Platinum lead wires 2 are connected to both ends of a fine resistance wire 1 formed by winding spirally a fine platinum wire, and the platinum resistance wire 1 is inserted into a ceramic tube 3 so that the welded part of the lead wires 2 and the wire 1 is held therein. Then, the homogeneous mixture 4 of ceramic sludge is compacted in a gap in the tube, sintered or burnt, and cooled gradually. Next, ceramic covers 6 having the same outline as the end surface of the ceramic tube 3 and provided with holes 5 for insertion of the lead wires 2 are put on both end surfaces of the ceramic tube 3 so that the lead wires 2 are passed through the holes, and both end surfaces of the tube are bonded by a bonding agent 7. A formed article thus obtained is dried at ordinary temperature and then is sintered again in a furnace to bond the ceramic covers 6 completely to the ceramic tube 3, and thereafter it is cooled down gradually to ordinary temperature. Thereby a sensor for measuring instruments prepared by fixing the fine platinum resistance wire 1 in the ceramic 3 with the sintered ceramic 4 and the ceramic covers 6 can be obtained.