Temperature measurement device for use with heating and air conditioning plant using polarized sensors

摘要

The device comprises polarized sensors, an electric power source and a serial branch (D1, D2, CT1, CT2) having first and second terminals coupled to the power supply terminals. Diodes (D1, D2) are connected in opposing directions between first (2) and second (3) terminals as are first and second detectors (CT1, CT2), with a common point between diodes and detectors in their middle. A switch is used to invert the polarization sense, so that the two detectors alternately have current passing through them.