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Soil water content, EC and temperature sensor

Model：Decagon 5TE

Using an electromagnetic field to measure the dielectric permittivity of the surrounding medium. The sensor supplies a 70 MHz oscillating wave to the sensor prongs that charges according to the dielectric of the material. Microprocessor measures the charge and outputs a value of dielectric permittivity from the sensor. Take temperature readings by a surface-mounted thermistor. Measure EC by applying an alternating electrical current to two electrodes and measuring the resistance between them.

Time Domain Reflectometry 100

Model : Campbell Scientific TDR100

Instruments for measuring soil water content and conductivity. Using the signal generator to generate an electromagnetic wave. When the measured medium is discontinuous, it will produces a reflection signal, and  then TDR100 can estimate the volumetric soil water content and the total soil  conductivity.

Pressure Transducer Tensiometer

Model：UMS T4e

Measure the tension of soil pores. It's composed of ceramic probe, acrylic tube and sensor. The piezometer tube and the soil are balanced by the porous probe at the front of the tensiometer. The induced pressure is recorded via an electronic sensor and converted to voltage for storage in the recorder.

Time Domain Reflectometry 6050X1

Model：TDR 6050X1

The principle of TDR 6050X1 is the same as that of TDR 100. The accuracy of water content is up to ±2%.

3G wireless transmission module

Model：3G module

Through wireless transmission, remote control  the local data to return to the laboratory. Mainly connected to the data recorder CR1000, providing real-time remote monitoring.

Pore water sampler (suction cup)

Model：UMS SIC20

Sampling equipment for soil pore water. Collect pore water by the pressure difference between sampling tube and soil while the pumping motor (VS-twin) is exhausting. 

Pumping motor control system

Model：VS-twin

The pumping motor can be used with SIC20 to collect soil pore water.

Composite Soil Monitoring System

(Patent number：M529166)

Soil infiltration rate can be obtained without disrupting soil structure. In the meantime, long-term monitoring of hydrological and water parameters are also continued, and we can analyze water quality. All parameters we need can be collect in a test.

KD2 PRO Thermal Properties Analyzer

Model：DECAGON DEVICES

The KD2 Pro is a handheld device used to measure thermal properties by the formula built in KD2 PRO and the dissipation when temperature changes in a unit of time. The instrument has heating element and thermosensor, and is equipped with KS-1, TR-1 and SH-1 and other three probes, respectively, which can be used to measure the soil, liquid and rock thermal conductivity.

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