Abstract: In order to reduce the measurement time of a device for measuring fluid temperature, in particular of water in the primary circuit of a nuclear power station, the device comprises a resistance probe (50) sensitive to the temperature of a stem (23) which is removably slid into a socket (1) itself secured in the pipe in which flows the fluid (10) whose temperature is to be measured. The stem ends with a surface in the form of a convex segment of a sphere (39) arranged to be urged by a resilient member onto a dish (42) force-fitted in the bottom of the socket.

Abstract: The measuring apparatus comprises a sensor (11) having a first electrical characteristic (balance of inductance) which is directly modifiable by the magnitude of a quantity or characteristic to be measured (e.g. pressure). A remote electrical power supply (27) excites the sensor over first and second conductors (28, 29) of an electrical link (22) having a second electrical characteristic (e.g. resistance) which is capable of disturbing the measurement. A third conductor (21) in the link is connected to a measuring instrument (24).In order to avoid measurement errors due to leakage currents in the link, the power supply (27) continuously monitors the electrical characteristics of the link and regulates its excitation output as function thereof and in such a manner as to tend to eliminate disturbing effects on the measurement.