| 摘要 |
PURPOSE:To confirm easily the remainder of oil by comparing the output of a strain gauge, which is provided in a load bearing part of a movable tank which is freely attached to and detached from a fixed tank, with a reference potential and displaying it. CONSTITUTION:The movable tank is fitted freely attachably and detachably to an oil supply port part of the fixed tank through a flat spring, and the output of a strain gauge 24 attached to the surface of the spring is inputted to a differential amplifying circuit 26 together with the reference potential formed by resistances 25a and 25b, and the output potential is supplied to a display part 28 through a discriminating circuit 27. Thus, variation of the resistance value of the gauge 24 due to the quantity of oil in the movable tank is displayed. |
