电阻式料位计一般适用于含水量较高,电阻值不太大的物料的料位控制。上海马铁厂在垂直分型无箱射压造型机(砂型尺寸为400×500毫米)的射砂筒加砂砂位的控制上,采用了一种电阻式料位计,其电气原理见下图。它可以由JG—5型光电继电器改装而成,线路简单。经三年多生产应用,工作可靠。该料位计有两组串联的直流电源,其中—8伏电源是作为G_3截止用的反向偏置电源。线路中由G_1、 Resistive level gauge generally suitable for high water content, resistance is not too large material level control. Shanghai Ma Iron Factory in the vertical sub-type box-free shot pressure molding machine (sand size of 400 × 500 mm) of the sand on the sand control of the sand, the use of a resistive level gauge, the electrical principle shown in the following figure . It can be modified by the JG-5 type photoelectric relays, the line is simple. After more than three years of production and application, reliable work. The level meter has two series connected DC power supply, of which -8 V power supply is used as a reverse bias G_3 power supply. Line by G_1,