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介绍了自行设计和制造的ＳＳＫＪ型砂水分自动控制仪的工作原理、结构以及在间歇式混砂机砂处理线上的应用。生产实践表明，在型砂混制过程中，本仪器可以快速自动检测型砂紧实率，并根据紧实率检测值反馈控制调节加入水量，使型砂系统的紧实率稳定在控制范围内，获得最佳的综合性能。该仪器的动作程序、检测信号的采集、数据处理、检测结果的显示和打印等，均由单片微计算机控制自动进行。
The working principle and structure of SSKJ sand automatic control instrument designed and manufactured by ourselves are introduced, and the application on sand treatment line of intermittent sand mixer is introduced. Production practice shows that during the sand mixing process, the instrument can quickly and automatically detect the compaction rate of sand, and adjust and control the amount of water according to the detection value of the compaction rate to stabilize the compaction rate of the sand system within the control range Good overall performance. The instrument’s action program, the detection signal acquisition, data processing, test results display and print, etc., are controlled by a single microcomputer automatically.