Patent ID: 8198554

Claim:
A load cell unit measuring a weight of a measured object based on a load signal, comprising: a strain generating element including a plurality of thin strain generating portions; a strain gauge placed on a corresponding one of said plurality of strain generating portions; a bridge circuit including said strain gauge; a zero compensation element which is connected in series with said strain gauge placed on one side of said bridge circuit and carry out rough correction on an output of said bridge circuit, by compensating zero of said bridge circuit which varies along with temperature change in accordance with a temperature of said strain generating element; a temperature sensor detecting said temperature of said strain generating element; a memory storing a parameter related to a temperature characteristic of said output of said bridge circuit; and a signal processor which calculates an amount of change in said zero after said rough correction based on a result of detection provided by said temperature sensor and said parameter and minutely corrects said output of said bridge circuit which is roughly corrected based on said amount of change, wherein said zero compensation element and said temperature sensor are provided in a portion interposed between adjacent ones of said plurality of strain generating portions, and said temperature sensor is in parallel with said bridge circuit.