APPARATUS FOR REDUCING THE USE OF ELECTRICITY AND FOR INCREASING THE SENSITIVITY IN THE THERMO-METER

摘要

The device mounted on a calorimeter used for central heating or district heating apartments, increases sensing ability for wide range of measuring the flow and for accurate measuring values, decreases power consumption of flow sensing section for reducing cost. The device comprises a pick-up coil for sensing signals of the flow, op-amplifiers (2)(3) for restricting electric current, resistances (R1)(R3) at respective op-amplifiers (2)(3) for reducing power consumption, condenser (C1) at the amplifier (2) for removing noise primarily, condenser (C2) and resistance (R2) at the amplifier (3) for comparing changes of delicate signals.