Product Brief
Soil hardness refers to a kind of soil mechanical property, which is comprehensively reflected by soil texture, structure, organic matter, humus and water content. It is usually expressed as the maximum pressure that can bear per unit area without deformation. The hardness of soil affects the plant's absorption of nutrients and water in the soil. Moreover, the hardness of soil also affects the plant's rooting and seed emergence. Research shows that loose soil is more fertile. It can be seen that the importance of soil hardness, hly-hn100 soil hardness tester is a professional measurement of soil hardness, simple and fast measurement, good stability, is a good helper for researchers and scientific growers.

Functional Characteristics
1. With high precision and high resolution: large screen LCD, backlight function (backlight is suitable for night use), and digital forward and reverse functions;
2. With battery capacity display: divided into 3 grids, 2 grids and 1 grid, the instrument automatically shuts down when the power is too low;
3. It has the function of setting the acceleration of gravity: the user can input the accurate value of the acceleration of gravity of the place of use by himself to make the test more accurate;
4. With peak holding function: keep peak display until manual reset;
5. It has the function of automatic peak value: the display peak value will be automatically released after 2 seconds;
6. It can store 447 test values;
7. With data output function: data can be input into computer through data line for various analysis;
8. With automatic shutdown time setting: automatic shutdown time setting can set 10 minutes to 90 minutes automatic shutdown;
9. High quality charging power supply: the charging voltage can be used from 100V to 240V, which can adapt to the vast majority of domestic and foreign regions;

Technical Parameter
1. Maximum load: 100kg (three units of kg, N and LB can be freely converted);
2. Resolution: 0.01kg;
3. Accuracy: ± 1%;
4. Measurement depth: 0-450mm;
5. Power: charging power: 220V / AC; battery continuous working time: 6-8 hours;
6. Stability: temperature drift: 0.2uv / ℃ (0-60 ℃); zero drift: ≤ 0.1% / 8h / Fs;
7. Calibration range: full scale calibration;
8. Ambient temperature: 0 ～ + 60 ℃;
9. Environmental humidity: ≤ 80%;
10. Allowable overload: 150%;
11. Power supply mode: 5 nickel cyanogen battery pack /110-- 220V AC charging for 4-6 hours.

Packing List
One digital display meter, one measuring head, one mounting block (aluminum quad), one adapter plate, two handles, one charger, one RS232 computer connecting line, one M4 hexagon wrench, four M4 * 10 hexagon socket head cap screws, four m3 * 8 hexagon socket head cap screws, four φ 4 elastic washers, one qualification certificate and warranty card, instructions, and one supporting software CD.