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SCM-1数字式砂子测湿仪为便携式仪器,适用于一般混凝土搅拌厂和施工工地。该仪器电路简单、工作可靠、测量精度较高、定标容易、使用方便,且造价较低;经技术鉴定已投入试生产。一、工作原理该仪器采用电容法测水分原理,脉冲测量电路,数字电压表形式。其传感器为一平行板电容器,当装入被测湿砂并经夯实之后,其介质总体介电常数ε可由下式求得
The SCM-1 Digital Sand Moisture Meter is a portable instrument suitable for general concrete mixing plants and construction sites. The instrument is simple in circuit, reliable in operation, high in measurement accuracy, easy in calibration, convenient in use, and low in cost; it has been put into trial production after technical appraisal. First, the working principle The instrument uses the capacitance method to measure the moisture principle, pulse measurement circuit, digital voltage meter form. The sensor is a parallel plate capacitor. When the measured wet sand is loaded and compacted, the overall dielectric constant ε can be obtained from the following formula.