Joint measurer for limits of liquid and plastic of model LP-100D Application:Optical projection,digital display and (two types)Electromagnetic head for automatic drop hammer are adopted, which reads depth of bury ranging from 0-22mm for the cone and determines limits of liquid and plastic of the soil ,so it is a required civil engineering instrument for construction. Technical parameters: ★Total weight of coning unit:76g±0.2g,100g±0.2g ★Coning angle:30°±0.2° ★Reading buried depth:0-22mm ★Accuracy of reading:0.1mm,reading by estimation:0.05mm ★Measurement time:5 seconds ★Electromagnetism attraction:>100g ★Mains:220V±10%