Heat meter for central heating systems - uses heat to current transducer and circuit integrating current with respect to time

摘要

The meter measures heat consumption by determining the difference between the flow and return temperatures of the heating medium. The temperature difference is converted into an electric current which is measured in a current/time integrator as an indication of heat consumption. The integrator may be a coulometer or a microcoulometer, using a gold/silver cell nad pref. with a linear scale. The electrical circuit may contain a voltage source and an electronic control circuit, although thermocouples may be used instead of the voltage source and the temperature difference measuring device. Manipulation of the meter to falsify the reading is almost impossible.