Instrument Name: Timed Positioning Soil Moisture Meter Model: ZN17-LG
Instrument testing principle:
Adopt the most popular field test soil moisture principle in the world: frequency domain reflection principle (FDR), that is, the sensor emits electromagnetic waves of a certain frequency, the electromagnetic wave propagates along the probe, returns after reaching the bottom, and detects the output voltage of the probe due to the dielectric constant of the soil. The change is usually based on the moisture content of the soil, and the relationship between output voltage and moisture can be used to calculate the soil moisture content. Moisture is the main factor determining the dielectric constant of the soil. Measuring the dielectric constant of soil can directly and stably reflect the true moisture content of various soils. FDR soil moisture sensor can measure the volume percentage of soil moisture, and has nothing to do with the mechanism of soil itself. This principle is the most popular measurement method of soil moisture sensor in the world.
Instrument applications: agriculture, forestry, environmental protection, water conservancy, and meteorology industries.
Main function of the instrument:
~ Quickly test soil moisture content.
~ Global satellite positioning data for the test site can be recorded at the same time, including longitude, latitude, and altitude.
~Test data can be saved in the instrument. Power is not lost.
~ With computer data upload software, you can upload the saved data to a computer to generate a database.
~ High brightness and strong backlight LCD screen.
~ High-strength engineering plastics handheld structure design, easy to carry ~ high-power lithium battery pack battery power, equipped with automatic charger.
~ Equipped with an external magnetic amplification circuit GPS satellite antenna, the signal gain is fast, unique in China.
Main technical indicators of the instrument:
Measured parameter: volumetric moisture content unit: %( m3/m3)
Range: 0 to 100%
Sealing Material: Epoxy Probe Material: Stainless Steel Measurement Accuracy: ±2%
Probe length: 5.3cm
Operating temperature range: -40°C～85°C
Probe diameter: 3mm
Operating current: 21~26mA, typical value 21mA
Operating voltage: 5 to 12V
Response time: <1 second Measurement stability time: 2 seconds Measurement area: Centered on the center probe, cylindrical diameter of 7cm and height of 7cm around the center probe Output signal: 0 to 1.875V DC
Cable length: 1.5 meters (standard)

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