Talking about the Significance and Application of Soil Profile Moisture Analyzer

First, soil moisture content test method overview:

The monitoring of soil moisture storage and its changing rules is the basic work for the monitoring of agricultural meteorology, ecological environment and hydrological environment. It should master the laws of soil moisture changes, and monitor and predict agricultural production, public opinion monitoring and forecasting, and relevant ecological environmental monitoring and forecasting services and theories. It is of great significance.

Second, the main method used to determine moisture in China:

1. Conventional earth-drilling sampling followed by drying and weighing method (weight ratio): Although it can measure soil moisture content more accurately, it is labor-intensive and time consuming, especially when weather conditions are poor, agricultural workers will Give more work. In addition, sampling will damage the soil, and it will be difficult to sample in deep layers. Inevitably, errors will arise from sampling and transposition in fixed-point measurements. In many cases, it will be impossible to conduct long-term fixed-point monitoring, which is also affected by the spatial variability of soil.

2. FDR single-point sampling method (volume ratio): The principle of FDR is used to determine the volumetric water content of the soil. The test accuracy is different from the above one, but it is quick and easy, but only one point can be measured.

3, TDR single point acquisition method (volume ratio): The use of TDR principle to determine the volumetric moisture content of the soil, the test accuracy and the first kind of gap, but better than the second kind of stability.

Third, the concept of domestic public opinion and drought and the characteristics of monitoring:

1. Long-term nature: A single probe measurement can be called soil volume moisture content, and long-term dynamic monitoring of soil moisture storage for a period of time since the water changes by the water conservancy and meteorological departments as the soil moisture. In other words, meaningful monitoring of public opinion is long-term and dynamic.

2, multi-point: For plant growth, the true measurement of soil surface moisture is not enough, normal plants need a deep moisture value to indicate whether he can absorb, in the national standards for water conservancy requirements, the experimental station must To monitor multi-level multi-point moisture for a long period of time, some areas require the long-term dynamic monitoring of water distribution at 10 cm, 20 cm, 40 cm, 60 cm, 80 cm, and 100 cm in the ground to understand the situation of drought and drought.

Fourth, the situation of domestic rapid soil moisture instruments:

In China's farmland guide water irrigation, FDR and TDR volume method fast moisture meter is very popular, because the two moisture meters can long-term buried sensors in the ground to achieve long-term monitoring. It is not affected by the experimental conditions, but the accuracy also reaches the role of guiding agricultural production, and there is no requirement for the quality of the workers. It is a kind of portable rapid instrument that is very suitable for field promotion.

Advantages: Fast, long-term monitoring, data saving

Disadvantages: Single point of acquisition. If more points are needed, the soil must be cut open. Insert several probes on the sections of 10 cm, 20 cm, 40 cm, 60 cm, 80 cm, and 100 cm. Laborious and time-consuming, the workload of the early period is large.

As shown below:

Single point type:

From the above analysis, the main points of domestic demand in the monitoring of public opinion are: easy to carry; high accuracy; easy to insert, and does not require a large number of instruments for early work.

However, this kind of instrument has only been done abroad, and all companies in the country have not made a soil moisture meter capable of meeting all the above requirements.

Now Zhejiang Top Instrument Co., Ltd. has also developed a profile moisture meter. The market prospect of this product is very good. This is the key point that we want to emphasize, and it is also the focus of our future promotion.

Now we need to understand this instrument:

Soil Profile Moisture Analyzer

Uses: It can be used to measure the water content in different depth profiles of soils and other analytes.

Principle: Using the FDR principle (Frequency Domain Reflectometry), the reflection of electromagnetic waves emitted by the detector in different dielectric constant materials is different. Calculate the water content of the test object.

Features:

1. Completely follow the ISO9001 quality system standards for product design, development, production and services;

2, in terms of hardware components to maximize product life and stability as the premise, fully consider the derating and redundant design;

3. Install lightning protection and surge protection equipment on power supply and communication interfaces;

4. The software design fully considers the friendliness of the interface operation, system compatibility, fault tolerance and robustness, and has automatic data copying and automatic uploading functions;

5. The components used in production are all subject to environmental stress, aging and screening;

6. The ex-factory equipment shall be designed with three protections (moisture-proof, salt-spray-proof and mold-proof) for environmental protection as required, and temperature, shock and vibration tests shall be conducted.

composition:

Probe:

・Cylindrical soil moisture probe (standard 4 or 6 points), these points can freely locate the user wants to measure the depth, free fixed

・ Operating software: Windows-friendly interface for data storage and download

• Pre-buried probe tube: made of PVC material, light weight, anti-corrosion, in addition to the standard length, but also an optional length of 0.9 meters, 1.2 meters, 1.5 meters

Basic technical indicators:

installation method:

After the installation of the picture:

Downloaded curve:

V. Advantages of Comparison between Our Soil Profile Moisture Analyzer and Abroad Soil Profile Moisture Analyzer

Domestic products

Foreign products

price

Reasonable price

High price

professional

Have professional staff to guide

There are no specially-familiar technicians in the country to guide

applicability

Full Chinese software, wide applicability

Full English software does not apply to grassroots operations

rationality

The probe points can be positioned according to their own requirements, can be modified at will, the length of the line can be customized according to customer requirements

Probe point distance fixed, can not be changed, the line length can not be customized

Accuracy

Calibrated before leaving the factory, high precision. Can also be recalibrated according to the soil provided by the customer

Foreign soil quality is not the same as domestic soil, so the factory calibration does not apply to China, and accuracy will have an impact.

Sixth, our company soil profile moisture meter model list:

Model list:

TZS-P4

TZS-P6

There are 4 sensors, distributed in 10cm, 20cm, 30cm, 40cm (Cocoa is free to position itself, not necessarily limited to these points, the above point is the factory fixed position.)

There are 6 sensors, distributed in 10 cm, 20 cm, 40 cm, 60 cm, 80 cm, 100 cm (which can be freely positioned by themselves, but not necessarily limited to these points, the above points are factory fixed positions.)

Related website: China Soil Instrument Network

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