HOTLINE 0086-29-88606479
  Tel: 86-29-88606479   E-mail:


About us

How to prevent corrosion, shock and dust in the use of radar level transmitter

DATE: 2019-04-17

How to prevent corrosion, shock and dust in the use of radar level transmitter

The radar level transmitter is an indispensable monitoring device. On one hand, the level transmitter can play the role of maintaining the smooth operation of the chemical production line, and on the other hand, it plays the role of life and property safety protection. For field instruments In terms of long-term exposure, the sun and rain, the instrument is prone to failure, then we need to do the instrument's anti-seat, anti-shock and dust-proof work, plus strengthen the management and maintenance of the instrument can not only improve the accuracy of the instrument can also extend the service life of the instrument. Here is how the field instrument is anti-corrosion, shockproof and dust-proof!

Anti-corrosion maintenance of field instruments

1.the choice of materials

Targeted selection of corrosion-resistant metal or non-metallic materials to manufacture parts of the instrument is the fundamental method for industrial instrumentation to prevent erosion. For example, titanium-like, metal-like parts are very strong for chlorine chemical media.

Corrosion resistance; instrument parts and gaskets made of poly tetra ethylene material are also widely used in various corrosive media environments.

2.the insurance layer

The formation of a protective layer on instrument parts or components is a common anti-corrosion method in the industry. According to the material of the protective layer and the forming principle, it can be divided into the following three types.

Metal barrier protection layer. Including spraying, plating, hot dip, car burizing, etc.

Non-metallic protective layer. Such as paint, acid-resistant cement, rubber, plastic, concrete, etc.

A non-metallic protective film is chemically treated on a metal surface to form a protective film such as an oxide film or a phosphate film;

3.Use spacer

This is an effective way to prevent skincare media from coming into direct contact with the meter. When it is not possible to select a suitable corrosion-resistant meter, the isolation solution can be used for isolation. Isolation fluid is often used for pressure and flow in corrosive media volume, level measurement. The spacer fluid must not be mutually soluble and chemically affected by the measured medium, nor can it be corrosive to the meter measuring components. The density of the spacer should be different with respect to the medium being tested and the working medium of the meter

It is vacant, and its density and viscosity should not change significantly when the ambient temperature changes; it should also have good fluidity. In case of accident, when the spacer fluid is mixed into the measuring pipeline, it should not be affected.

Measure the use of the media. For example, glycerin aqueous solution is suitable for oily beauty, water gas, semi-water gas, C1, C2 and other hydrocarbons; ethanol is suitable for propane, butane and other media; methyl silicone oil is suitable for dehumidification chlorine gas.

Gas and liquid.

4.diaphragm isolation

Corrosion-resistant diaphragms are used to isolate the spacer or filling fluid from the measured medium for corrosion protection purposes. It is suitable for highly corrosive media, difficult to use in-tube isolation or container isolation, usually suitable for

Pressure measurement, no differential pressure measurement is declared. The isolating diaphragm should be elastic and impervious, such as the commonly used diaphragm pressure gauge, single flange anti-corrosion pressure transmitter and so on.

5. blowing method

This is to use the blown air (or inert gas such as nitrogen) to isolate the measured medium from the surface of the meter measuring component. The air blowing method is usually used for a liquid pressure measuring system of normal pressure or low pressure, and the blowing gas should not be corroded.

The measured medium acts. According to the principle of constant pressure of the blowing method, the blowing liquid (clean liquid such as water) method is also applied in the flow rate and liquid level measuring system. For example, blowing steam condensate to isolate the medium to the instrument

The table measures the corrosion of the components and eliminates the blockage of the pressure guiding tubes.

Dust maintenance of field instruments

The dust proof method on the outside of the instrument is to protect the instrument or put it in the sealed box.

For the protection of dust, impurities and particles in the tested medium, in addition to measures to prevent clogging by measures such as reducing dust, it is usually used to thicken the ingestion tube, add a dust collector, add a blower and add protection.

Screen protection and other methods.

The crude extraction tube is often used in combination with a dust collector and a purging device. When measuring the flow rate using an orifice plate without a ring chamber, you can directly use a 1.5 to 2 m thick ingestion tube at the pressure tap and add a plug to facilitate the repair.

Clean the holes or use them as a vent. In the liquid level measurement, in order to prevent crystallization in the negative pressure tube, a vacuum condensate may be used for the negative pressure tube. For gas measurement of moisture, water separators can be used

This is common in pressure and flow measurements.

Share to
  • Number of clicks: 266
    2021 - 03 - 02
    Radar level instruments measure the distance from the transmitter/sensor (located at some high point)to the surface of a process material located further below in much the same way as ultrasonic level sensor, by measuring the time-of -flight of a traveling wave and then determine the level of the process material. They are regarded as continuous level measurement devices because they continue to measure level even as the level of the liquid in the vessel changes.The fundamental difference between a radar level instrument and an ultrasonic level instruments is the type of wave used. Radar level instruments use radio waves instead of sound waves used in ultrasonic instruments. Radio waves are electromagnetic in nature (comprised of alternating electric and magnetic fields), with very high fr...
  • Number of clicks: 2
    2021 - 02 - 25
    The working principle and five precautions for using the radar level sensorThe radar level sensor is a measuring instrument based on the time travel principle. The radar wave runs at the speed of light, and the running time can be converted into a level signal by electronic components. The probe sends out high-frequency pulses and conducts them along the cable and rod probes. When the pulses meet the surface of the material, they are reflected back by the receiver in the meter, and the distance signal is converted into a level signal, Transmit-reflect-receive is the basic working principle of radar level sensor.The antenna of the radar sensor emits electromagnetic wave signals in the form of beams. The emitted waves are reflected on the surface of the material to be measured, and the ...
  • Number of clicks: 212
    2021 - 02 - 23
    Our DCRD1000C series guided wave radar level gauge has been successfully applied to the measurement of liquid level in a horizontal tank of a biotechnology company. Since the product is installed and used, it has monitored the liquid/corrosive liquid level changes in real time, and the signal stability measurement effect is good.If there is similar enquiry, please feel free to contact us!!!
  • Number of clicks: 101
    2021 - 02 - 19
    Factory of Radar level transmitter have resumed production  With the time going by, the Chinese New Year Holiday is over and our factory has resumed production now. The continuous level measuring products include 26GHz high frequency radar level transmitter, guided wave radar level transmitter, 80Ghz FMCW Radar  level transmitter, 120Ghz FMCW Radar level transmitter and Electromagnetic flow meter. These products are widely used in electricity, water, food & beverage, petroleum, petrochemical, coal, chemical, metallurgy industries. Measurable products: petroleum, petroleum products, heavy oil, asphalt, gasoline and other light-colored petroleum products, acid, food, beer, alcohol, milk, liquefied gas, sewage, solution, phenol, ore, cement, seeds, coal ...
  • Number of clicks: 361
    2021 - 02 - 02
    The radar level transmitter should be installed to avoid contact between the sensor and the tank wall and should be kept at a certain distance from the tank wall. Because the radar level transmitter is measured by transmitting high-frequency microwave pulses along the detection component, the dielectric constant changes when these pulse waves encounter the measured medium, causing the emission. Therefore, if the installed radar level transmitter is too close to the tank wall, the dielectric constant of the tank wall may be obtained, which directly leads to the in accuracy of the measured parameters.Correct installation method of radar level transmitter:1. Installed one fourth or sixth of diameter.Note:the minimum distance from the tank wall shall be one tenth ...
Tel:86-29 88606479
Fax: 86-29 88385903
B203, Gazelle Valley, No.69 Jinye Rd, Hi-tech zone, Xi'an, Shaanxi Province, P.R.China. 710077
Copyright ©2018 - 2019 Dechuang Electrical Technology Co., Ltd SITEMAP
Rhino Cloud Provides Enterprise Cloud Services