Soil moisture temperature detector BJ4S-QS-WT

3. Instrument introduction:
The soil moisture temperature tester QS-WT can accurately detect soil moisture and soil temperature, and the measurement is rapid, and the results are directly read. It can conduct field flow tests on various types of soil, and can meet the requirements of agriculture, forestry, environmental protection, water conservancy, meteorology Demand for soil monitoring, water-saving irrigation, greenhouse control, and precision agriculture.

Second, the detection principle:
The water measurement uses the standard frequency domain reflection principle. The instrument emits electromagnetic waves of a specific frequency. The electromagnetic waves are transmitted along the sensor probe to the bottom of the soil and then returned to detect the voltage output by the probe. The relationship between the output voltage and the curve model of the water is automatically calculated. Water value; temperature measurement adopts contact silicon semiconductor sensing method;

3. Features:
* Direct measurement of soil water content and temperature and display values, fast and accurate
* Wide range of measurement area design, can detect the temperature of soil, grain, tobacco, steam and various liquids
* Portable design, hand-held operation
* LCD liquid crystal digital display, the display is clear and intuitive
* Built-in high-capacity rechargeable battery, equipped with fast charger
* The test speed is fast, and the result can be tested in 0.5 seconds.
* Automatic shutdown time can be set according to user needs, the factory setting is 3 minutes standby automatic shutdown function
* Power saving 5 seconds probe warm-up measurement mode;
* Dedicated portable case for easy field inspection
* The temperature sensor adopts silicon semiconductor, rapid measurement, high accuracy, high stability, 300uA ultra-low current design, ultra-low power consumption, thousands of times less energy than similar
* Sensor signal output adopts standard current loop transmission technology, with strong anti-interference ability and long transmission distance
* Moisture sensor material is polytetrafluoroethylene, sealed waterproof, acid and alkali resistant, corrosion resistant, can be buried in the soil for a long time without maintenance
* Moisture sensor is rigorously calibrated, it is less affected by soil quality, and can be used in various soils and regions

4. Technical index of moisture measurement:
â—† Test type: volumetric water content â—† Test range: 0 ï½ž 100% (m3 / m3)
â—† Response time: <0.5 seconds â—† Probe length: stainless steel part 6.5cm
â—† Cable length: 1.7 meters (the longest can be extended to 50 meters);
â—† Absolute error of test: â‰¤2%
â—† Relative percentage error: â‰¤3%
â—† Moisture measurement principle: sensor frequency domain reflection â—† Probe output voltage: 0-2.5V â—† Working voltage: 12 or 24VDC
â—† Key mode: thin film touch type â—† Display mode: LCD liquid crystal, digital direct reading â—† Working environment: temperature: -30 ï½ž 70 â„ƒ humidity: â‰¤90% RH

5. Technical index of temperature measurement:
â—† Temperature measurement range: -50 â„ƒ ï½ž 65 â„ƒ
â—† Accuracy: Â± 0.3 â„ƒ full scale Â± 0.1 â„ƒ
â—† Sensitivity: Â± 0.1 â„ƒ
â—† Sensor: silicon semiconductor â—† Display mode: LCD liquid crystal â—† Key mode: thin film touch â—† Temperature measurement principle: contact silicon semiconductor sensor â—† Working power supply: 1.5V, 300uA
â—† Automatic shutdown in 3 minutes â—† Probe length: 25cm
â—† Total cable length: 168 cm

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