What is a soil moisture analyzer used for? How to use the moisture analyzer

Soil nitrogen, phosphorus and potassium tester is a professional soil analysis instrument, which can quickly and accurately determine nitrogen, phosphorus, potassium and other nutrients in the soil. The instrument uses the principle of photoelectric colorimetry to calculate the nitrogen, phosphorus and potassium content in the soil by comparing the absorbance of the standard solution and the soil sample to be measured. There are many benefits to using a soil NPK analyzer.

First, it can improve the accuracy and precision of the assay and avoid human error and environmental interference in traditional chemical analysis methods. Second, it allows for fast results without the need for lengthy sample processing and laboratory analysis. In addition, the instrument also has the advantages of easy operation, easy to carry, and low cost of use.

In agricultural production, soil nitrogen, phosphorus and potassium analyzers are widely used. By measuring the nitrogen, phosphorus, and potassium content in the soil, it is possible to...

How to use the moisture analyzer:Material preparation: a moisture roller meter, a 100g weight, a test sample of consumer products, a tripod, a tray, a windshield, and a power cord.

1. Install a draft shield.

2. Install the triangular bracket and place the triangular bracket on top of the windshield.

3. Install the tray bracket to the triangular bracket.

4. After installing the bracket, press zero and put weights for calibration.

5. After the calibration is completed, put in the sample tray and fiberglass paper.

6. Tell the bureau to close the lid and press the "start button" to start the test, and the halogen light will be on.

7. When the alarm sounds, press the STOP button to complete the measurement.

It is very simple to take the manufacturer instrument of Shenzhen Houwang:

1. Install the moisture accessories according to the instructions.

2. Plug in the power supply, and then press the power button on the instrument display.

3. Press the temperature button to confirm the current use temperature, press the tare button and the start button to adjust, and press the temperature button to confirm after setting.

4. Then put the product in the measuring tray and flatten it, cover the missing cover, and press the start button after the instrument is stable.

5. After the machine drips twice, it means that the test is over. Toggle by g % to display moisture, mc, and solids dc

6. Press the tare button to exit, and wait for the temperature to be reduced by 40° before measuring other products.

You said the steps of using the moisture analyzer, I don't know what kind of principle of instrument you are using, according to the principle of determination, the moisture meter can be divided into two categories: physical determination and chemical determination, the use of steps is completely different, I sort out just my laboratory, I have two different principles of the instrument, I will inform you together.

Let's start with the steps of physical law:

My laboratory is the king moisture analyzer, very simple to complete in a few steps, according to the instructions to install the instrument accessories after setting the temperature of the buried macro product in the measuring tray flat, cover the lid to wait for the instrument to stabilize after pressing the start button, waiting for the machine to drop two sounds on behalf of the end of the test.

Personal operation caseThis instrument is still relatively simple to complete the test in a few minutes, do not need to pay attention to the test process, after the operation of the instrument alarm to inform your hands, saving your time and cost!

Let's talk about the steps of chemical methods;

The equipment used in the laboratory is a small life in a good country, a little complicated, and it is generally relatively simple according to the instructions and guidelines. First, install the electrolytic cell system and drying tubes, carefully load the color-changing silica gel into the two bent drying tubes and cover the small plugs. After opening the reagent bottle, add the reagent into the electrolytic cell bottle (anode chamber) through a small dry funnel and add it between the two scale marks of the electrolytic cell bottle.

Although the cathode chamber corresponding to the electrolytic electrode does not add reagents, it will be level with the liquid level of the anode chamber due to the principle of the communicator).

Then install the two electrodes on the corresponding electrode holder, after entering the main interface, press "stirring" first, observe whether the stir bar has been started, and adjust the speed by adjusting the blue speed control knob on the back panel of the instrument, which is generally appropriate to just generate vortex. Press "Electrolysis" again, and the instrument will display: "Measuring electrode short circuit!"

This is normal, you need to use a 100ul or 50ul injector to add water, through the injection port into the electrolytic cell below the liquid level, this process should be slow, slowly injected, until the instrument display on the UG number begins to accumulate, or the corresponding DET value is greater than zero to stop the injection of water, pull out the injector, at this time the instrument displays: "The electrolyte is in initial equilibrium ......After waiting for the electrolyte to equilibrate, the Coulomb titrator automatically prompts: "The electrolyte is equilibrated", so that the sample can be tested.

1. The operation process of the moisture analyzer:1. The instrument is placed on the surface of the liquid hydroponic water platform determined by stable burial.

2. Connect the power supply and turn it on.

3. Sampling. 4. Close the heating cylinder, and the instrument will be tested automatically.

2. Conditions for the use of moisture analyzer:1. The use of environmental knowledge: dust-free, dry, no vibration.

2. There is no flowing wind blowing.

3. There is no magnetic field around.

1. Install all accessories according to the instructions in the manual.

2. Plug in the power supply, then press the power button, and the instrument will be displayed.

3. Press the temperature button to confirm the current use temperature, and press the tare button and start button to adjust. After setting, press the temperature button to confirm the gesture.

4. Then place your measured sample in the measuring tray and lay it flat and cover it. Press the start button when the instrument is stable.

5. After the machine drips twice, it means that the test is over. Toggle by g % to display moisture, mc, and solids dc

6. Press the tare button to exit, and wait for the temperature to drop by 40° before measuring the product.

Soil moisture determination method is specifically introduced:

1. Drying method: The drying method is the most common method for determining soil moisture, and it is also the standard method. Specifically:

A certain amount of soil is obtained from the field, and then placed in an oven of 105 degrees Celsius, waiting to dry. Among them, the standard of drying is that the weighing is constant before and after. The moisture lost after drying is the moisture content of the soil.

The calculation formula is soil moisture content = w m * 100%, m is the weight of the soil before drying, w is the weight of soil moisture, that is, the difference between m and the weight of the soil after drying m'.

2. Resistance method: The resistance method uses the resistance of gypsum, nylon, glass fiber, etc. to be related to their water content. When these intermediates plus electrodes are placed in moist soil, and then after a period of time, the moisture content of these things reaches equilibrium.

Because of the relationship between resistance and water content, we have previously calibrated a certain correspondence between resistance and percentage, and then we can use these components to obtain a moisture reading in the suction range of 1 15 atmospheres.

3. Neutron scattering: The neutron method is suitable for measuring soil moisture in the field. Based on the principle that hydrogen dramatically reduces the velocity of fast neutrons and scatters them, there are now neutron moisture meters on the market to measure soil moisture.

The neutron moisture meter has many advantages, but it is quite limited to organic soils, and it is not suitable for measuring soil moisture content from 0 to 15 cm.

4. Radiographic method: Similar to the neutron meter, the radiographic transmission method uses the radioactive source 137CS to radiate the line, and uses the probe to receive the energy after the radiation passes through the soil, and converts it with the soil moisture content.

5. TDR (Time Domain Reflectometry) method: TDR method is a soil moisture determination method developed in the 80s of the last century, and the Chinese is time domain reflectometry. This method is quite common in foreign countries, and it has just begun to be introduced in China, when all departments attach great importance to it.

TDR is a system similar to a radar system, with strong independence, and its results are basically independent of soil type, density, and temperature. And, importantly, TDR is able to measure soil moisture under icing, which is unmatched by other methods. In addition, TDR can monitor soil water and salt content at the same time, and there is almost no difference between the two measurements.

The accuracy of this method is evident.

Soil moisture analyzer (top).

The characteristics of the soil moisture analyzer are as follows:

The soil nutrient detector is easy to operate. The following are the steps to use the soil nutrient detector:

1. Experimental procedure (take nitrogen content test as an example).

1. Take 4 grams of soil sample and put it into the sample bottle, add 20 ml of water with a syringe, add 1g of No. 1 powder to cap the bottle, and filter it for 10 minutes.

2. Blank solution: add two-thirds of distilled water to a glass cuvette as blank solution;

3. Standard solution: Add 900 l of water to another glass cuvette with a pipette, then add 100 l of nitrogen standard solution, and then shake well, the concentration of this standard solution is 20mg kg

4. Liquid to be tested: Absorb nitrogen and potassium with a plastic straw and add 1000 l to the glass cuvette, add 100 l of nitrogen No. 1 reagent to the glass cuvette containing the standard solution and the liquid to be tested, and then add 100 l of nitrogen No. 2 reagent and shake well, park for 10 minutes, then add 800 l of water and shake well, and then immediately operate at the upper level.

Second, the operation steps on the machine.

1. Turn on the power switch, enter the login page after the instrument is turned on, enter the account password, click [Login] to enter the system, click [Nitrogen Content Test] on the [Project Selection] interface to enter the test interface, select the standard concentration, the nitrogen test is generally 20mg kg, and the user can also configure other concentrations of standard solution.

2. Click [Blank Test] to put the blank liquid into the test channel corresponding to the red light and press OK; Click [Standard Test] to put the stabilized standard solution into the 9th channel and press OK, the absorbance will display the corresponding value, after the standard test is completed, click [Sample Test] to put in one or more stable solutions to be tested and press OK.

Follow the instructions, which is simple and easy to understand. Soil testing and formula fertilization to increase yield and efficiency.

Soil nutrient tachymeter is also known as soil fertilizer nutrient tachymeter and soil fertilizer tachymeter. The instrument is mainly used to detect the content of nitrogen, phosphorus and potassium in soil, such as moisture, salinity, pH value, total nitrogen, ammonium nitrogen, alkali hydrolyzable nitrogen, available phosphorus, available potassium, calcium magnesium, boron, etc. It greatly alleviates the needs of farmers all over the country for soil testing and formula fertilization, and also provides a reliable basis for fertilizer production enterprises to achieve specialization, systematization, informatization and data, and is the preferred instrument for soil testing and formula fertilization in the agricultural sector.

The Android intelligent operating system of the soil nutrient detector adopts a more efficient and humanized operation, and the instrument is equipped with wifi wireless upload and 4G network transmission as standard, and can quickly upload data.

It must be easy to use, otherwise why develop this instrument, the soil nutrient detector is the latest technology research and development, and the test speed is faster! There is no need for blank control and standard calibration, eliminating the cumbersome operation steps in the past, one-button operation, direct reading of data, supporting complete sets of accessories and finished chemicals. The soil nutrient detector integrates medicine, utensils and instruments, which is easy to carry and is equivalent to a small laboratory.

It is suitable for agricultural service departments or agricultural material dealers, fertilizer manufacturers to test soil and fertilize and identify the authenticity of fertilizers.

1. What are the main reasons for the poor repeatability of the measurement results of the moisture analyzer and the measures?

3) The sample is toxic and caustic

At present, there are many fixed-point soil moisture determination methods used at home and abroad, mainly including drying weighing method, tensiometer method, radiographic method (including neutron meter method, radiographic method, computed tomography method, etc.), dielectric characteristic method [time domain reflectometer (TDR) method, frequency domain reflectometer (FDR) method, ground penetrating radar (GPR) method], soil moisture sensor method (such as: ceramic moisture sensor, electrolyte moisture sensor, polymer sensor, piezoresistive moisture sensor, photosensitive moisture sensor, microwave moisture sensor). , capacitive moisture sensors, etc.), thermal diffusion method, nuclear magnetic resonance (NMR) method, separation tracer (PT) method, remote sensing (RS) method, etc. Among them, the drying weighing method is the most common method for determining soil moisture content.

Ground Penetrating Radar (GPR) method and remote sensing (RS) method have great advantages in large-scale soil moisture monitoring.