ELECTRONIC FORCE BALANCE

PROBLEM TO BE SOLVED: To provide an electronic force balance wherein the variation in the measured value due to the heating of electronic circuit elements can be suppressed, without so raising the cost and without losing the design and the operability. SOLUTION: The electronic force balance has a balance mechanism 1 and electric circuits 21, 22, 23 all housed in the same casing 3, air flow blocking members 81, 82, 83 partition the electric circuits 21, 22, 23 from the balance mechanism 1, an opening 23c for venting the hot air to the outside is formed in the casing 3 at the layout region of the electric circuit 21, thereby directly exhausting the hot air generated from the heating of elements in the electronic circuits 21, 22, 23 from the opening 32c, without allowing the air to reach the layout region of the balance mechanism 1. Thus the temp. difference between the layout region of the balance mechanism 1 in the casing 3 and the interior of a weighing chamber 6 is reduced to prevent the air from flowing into the weighing chamber 6 through a through-hole 32b to strike on the bottom face of a weighing pan 5.