1. Soil Hardness Meter adopts theoretical value of pressure gauge Kg/cm2,test soil hardness directly. 2.It's widely used in the test of soil permeability, aeration and soil properties survey research,convenient and accurate. 3.Hardness indication range:0-40mm 4.Portable and easy to operate Test method: 1. Level the measuring soil surface, then insert top part of instrument into the soil until the mouth part. 2. Vertically pull out the soil hardness meter and read the hardness indicating value of the meter. After finished reading the measured value, drive rotary-knob, make the indicating meter to zero. 3. After reading the result, please rotate knob driven needle, make indicator to zero. 4.Soil attached to the inside of measuring head will make the measurements incorrect. Please clockwise rotate (opening) part, take down round sleeve, rotate to the fixed position after cleaning up, then can measure again. 5.Hardness indication range: 0-40mm, 0-500kg/cm2
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