Sensor factory

Sensor factory

Compared with data acquisition, remote transmission equipment can form a telemetry system. For example, when the soil is dry, a warning signal can automatically sound to remind people that it is time to irrigate. Automatic control system switches water pumps and valves, etc. Combined with some additional sensors, soil moisture evaporation and the required moisture parameters for crops can be calculated. The comprehensive application of three irrigation table technologies (evaporation rate, crop stress index CWSI, and soil moisture) can provide the maximum suitable growth for crops.

Moisture is the main factor determining the dielectric constant of soil. Measuring the dielectric constant of soil can directly and stably reflect the true moisture content of the soil. The volume percentage of soil moisture that can be measured is independent of the mechanism of the soil itself and is currently the most popular soil measurement method. It is a sensitive sensor for measuring soil moisture.

Sensor factory

Technical Parameter

1. Measurement parameters: Soil volumetric moisture content

2. Unit:% (m3/m3)

3. Accuracy: ± 2% (m3/m3) within the range of 0-50% (m3/m3)

4. Measurement area: 90% of the influence is within a cylinder with a diameter of 3cm and a length of 6cm surrounding the central probe

5. Stabilization time: about 1 second after power on

6. Response time: The response enters the steady-state process within 1 second

7. Working voltage: current output is 12V~24VDC, voltage output is 5VDC

8. Working current: 50~70mA, typical value 50mA

9. Output signal: current output is 4-20mA, current loop, voltage output is 0-2.5VDC

10. Sealing material: ABS engineering plastic

11. Probe materials: stainless steel and copper

12. Cable length: 5 meters in length

13. Telemetry distance: less than 1000m

14. Temperature (optional):

Range: -40~80 ℃ Accuracy ± 0.2 ℃

Signal output: Platinum resistor (four wire connection)

characteristic

Stability, easy installation, maintenance and operation

The supporting material is epoxy resin, which provides strength and lifespan

Good sealing performance, can be buried in soil for a long time and is not corroded

The current loop transmission technology used makes it highly resistant to interference. The characteristics of long transmission distance, measurement accuracy, and fast response speed

The impact of soil quality is relatively small, the application area is suitable, and the price is low

1. Integrated circuit technology. Adopting temperature and humidity compensation technology, the measurement accuracy and stability are good.
2. Wide screen digital backlight display, which can clearly display measurement readings even in low light environments.
3. Fast measurement speed, can replace traditional oven method, shorten the moisture determination time, and the entire process only takes 1 second to read, greatly saving the precious time of the testing personnel.
4. Small size, light weight, strong anti-interference performance, and can be carried on site for rapid testing.
5. The instrument design adopts low-power large-scale integrated circuits and liquid crystal display technology, with low power consumption
6、 Precautions for pastry moisture tester
1. Moisture does not have * properties within the tested object, so the moisture content in different positions of the same tested object will vary, resulting in different measured results.
The insertion depth of the measuring needle directly affects the measurement results. In general, the deeper the insertion, the larger the measured moisture value. Therefore, please pay attention to the accuracy of the needle insertion depth.
If the instrument is not used for a long time, please remove the battery to prevent damage to the instrument caused by battery leakage.
On the basis of introducing technology, Shanghai Jiashi Co., Ltd. has pioneered the integration of electric field sensors and mainframe technology, which enables the instrument to generate an electromagnetic field sensitive to water molecules around the test probe. By utilizing the characteristic of water molecules absorbing energy, a fixed electric field energy is generated and compared with the lost electric field energy to obtain accurate moisture values. And for items with different moisture contents, the instrument obtains different moisture values based on the energy absorbed. Therefore, it greatly improves the quality of food.