The soil integrated sensor is suitable for measuring soil temperature, moisture, total soil salt (conductivity), soil pH and nitrogen, phosphorus and potassium. The soil comprehensive sensor creatively measures the seven parameters of conductivity, moisture, temperature, ph, and nitrogen, phosphorus and potassium, which greatly facilitates the customer's systematic assessment of soil conditions. .

Compared with the German original high-precision sensor and the actual soil drying weighing method calibration, the sensor has high accuracy, fast response and stable output: it is less affected by the salt content of the soil and is suitable for various soil qualities. Can be buried in the soil for a long time, resistant to long-term electrolysis, corrosion resistance, vacuum potting, and completely waterproof.

It is widely used in scientific experiments, water-saving irrigation, greenhouses, flowers and vegetables, grassland pastures, rapid soil testing, plant cultivation, sewage treatment, grain storage, and the measurement of various particulate water content and temperature.

parameter

content

Power supply

12-24V DC

output signal

RS485

Temperature measurement range

-40℃-80℃

Temperature accuracy

±0.5℃

Temperature resolution

0.1℃

Moisture measurement range

0-100%

Moisture accuracy

±3% in the range of 0-53%; ±5% in the range of 53-100%

Moisture resolution

0.10%

Conductivity measurement range

0-10000us/cm

Conductivity resolution

10us/cm

pH measurement range

3-9pH

pH measurement accuracy

±0.3pH

pH resolution

0.01pH

NPK measurement range

0-1999mg/kg

NPK measurement accuracy

±2%F.s

NPK resolution

1mg/kg(mg/l)

Storage environment

-20℃-60℃

Working pressure range

0.9-1.1atm

Response time

<1s

Protection level

IP68

Installation method

Embed all or insert all probes into the measured medium

Note: The details of all measurable parameters of this series of products, please refer to the actual product purchased.

When measuring frozen icy soil layers, the moisture value will be low and inaccurate, requiring user compensation.

The factory default product is suitable for measuring ordinary yellow soil, black soil and red soil. It is not suitable for absolute moisture measurement on saline-alkali soils, sandy soils, or other powdery objects with high salinity. It can still characterize the relative moisture difference. For this type of moisture measurement, you should contact the manufacturer for separate calibration.

The soil moisture calculated by this sensor is soil volumetric moisture content (also called soil volumetric moisture content), which is what people call "soil moisture" and "soil moisture" in a popular sense.

The calculation method of soil volumetric water content is the ratio of the volume of water in the soil to the total volume of the soil. 0% means completely dry soil without any moisture, and 100% means completely water without any soil.

This sensor can be connected and used alone. First, use 12V DC power supply. The device can be directly connected to a PLC with a 485 interface, and it can be connected to a single-chip microcomputer through a 485 interface chip. The single-chip microcomputer and PLC can be programmed through the specified modbus protocol to cooperate with the sensor. At the same time, use USB to 485 to connect to the computer, and use the sensor configuration tool provided by our company for configuration and testing.

This product can also be used in combination of multiple sensors on a 485 bus. In theory, one bus can connect more than 16 485 sensors. If you need to connect more 485 sensors, you can use 485 repeaters to expand more 485 devices. One end is connected to the PLC with 485 interface, and the single-chip microcomputer is connected through the 485 interface chip, or it can be connected to the computer by using USB to 485. Use the sensor configuration tool provided by our company for configuration and testing.

Please check the equipment list before installing the equipment:

name

Quantity

High precision sensor

1set

12V waterproof power supply

1set(Optional)

USB to 485 device

1set(Optional)

Warranty card/certificate

1 serving

The power interface is a wide-voltage power supply that can output 12-24V. When wiring the 485 signal line, pay attention to the A/B two lines can not be reversed, and the address of multiple set devices on the bus can not conflict. The line sequence description is shown in the following figure (table):

Thread color

Description

power supply

brown

Power is positive(12-24VDC)

black

Power negative

Communication

Yellow (gray) color

485-A

blue

485-B

Note: Please be careful not to connect the wrong wiring sequence, the wrong wiring will cause the equipment to burn.

The factory default provides 1.25 meters of wire, customers can extend the wire as needed or wire in order.

Note that there is no yellow line in the line sequence that may be provided in some factory batches. At this time, the gray line is equivalent to replace the yellow line.

The picture below is the appearance of our product: