SM4 column load sensor is designed for pumping well dynamometer test. He is a load sensor with high anti-interference performance. The product adopts standard MV signal output and full sealing design, which can work in harsh environments such as high temperature, high cold, high humidity and high radiation. At present, it is widely used in pumping unit dynamometer card measurement system. It is widely used in polished rod force measurement, truck scale, track scale, hopper scale and other measuring equipment in major oil fields.