The measuring principle TZS-I soil moisture meter

Soil moisture meter measuring principle emergence TZS-I soil moisture meter perfect solution to soil moisture. Soil moisture meter is based on the microwave transmission line impedance transformation theory is applied to the soil moisture measurement and design, and the design of soil moisture meter is not only low cost, but also meet the accuracy requirements. Soil moisture meter in the soil moisture content of from 5% to 40% of the measurement error of ± 3%, in the range of 40% to 50% margin of error does not exceed ± 5%. Soil moisture meter measuring system consists of a high-frequency oscillator, transmission lines, signal conditioning circuitry and A / D conversion and display circuit 4 parts. The oscillator frequency stability great influence on the measurement results, because of changes in the frequency of the signal source wavelength transmission line means a few changes. The signal conditioning circuit output of the differential signal transmission line is amplified to the A / D converter. Amplifier with high input impedance and common mode rejection ratio. Soil moisture meter with test high accuracy, high reliability, easy to carry and low cost, etc., to get the approval and use of expert personnel. Instrument Name: Soil moisture meter Instrument Model: Features TZS-I soil moisture meter: compact appearance and easy to carry, touch keys, large screen dot matrix LCD display, full Chinese menu operation. One-button switch, you can manually record. You can also set the recording interval, automatically recorded and stored. Can be connected to a computer for data upload, processing, backup. AC and DC, to field data collection anytime and anywhere. Location can also be placed a long record collection. Powerful data storage capabilities, the largest set of data can be stored 120000. Soil moisture meter technical parameters: Record Capacity: 120,000 data (2 parameters 120000/2) Record interval: 5 seconds -90 hours continuously adjustable sensor communication: the RS485 computer communication: USB1.1 Power: 5 5 batteries, 9V/2A power adapter Product Details: Soil moisture meter http://www.top17.net/yq_list/yq_38_1.html Zhejiang Top Instrument http://www.top17.net/