The liquid level transmitter can convert the changes of various level parameters into analog signals, and transmit them to the control room remotely for centralized display, alarm or automatic control of secondary instruments or computers. Its good structure and installation method can be applied to the continuous detection of liquid level, material level or material level under special conditions such as high temperature, high pressure, strong corrosion, easy crystallization, anti-clogging, anti-cold junction, and solid powdery and granular materials. , can be widely used in detection and control in various industrial processes.
Liquid level transmitters can be applied to liquid Level Measurement and control in industrial sites, rural water supply and sewage treatment, petroleum, chemical industry, power plants, hydrological monitoring, reservoirs, dams, hydropower construction and other fields of liquid level measurement and control. Liquid level transmitters have input type, straight rod type, flange type, threaded type, inductive type, screw-in type, floating ball structure design, with anti-blocking type design, simple device, convenient use and strong interchangeability , The high-quality sensor has high sensitivity and fast response speed, accurately reflects the slight changes in the flow or static liquid level, and has high measurement accuracy.
Advantages of Level Transmitters
1. The device is simple, easy to use, and has strong interchangeability.
2. It is suitable for measuring the liquid level and interface of the liquid medium in the container. In addition to on-site instructions, it can also be equipped with remote transmitters, alarm switches, and complete detection functions.
3. The reading is intuitive and eye-catching, and the direction of the observation indicator can be changed according to the user's needs.
4. The measurement range is large, not limited by the height of the storage tank.
5. The indicating mechanism is completely isolated from the measured medium, with good sealing performance, high reliability and safe use.
6. Simple structure, convenient installation, convenient maintenance, corrosion resistance, no power supply, explosion-proof.
7. The high-quality sensor has high sensitivity and fast response speed, accurately reflects the slight changes of flowing or static liquid level, and has high measurement accuracy.
8. With intrinsically safe explosion-proof and isolated explosion-proof capabilities, it can be used in various dangerous places.
9. With anti-blocking design, it can realize the measurement of the liquid level of paste medium.
10.100% equal division scale, LED/LCD indicator head, very convenient to read on site.
11.4~20mA two-wire signal transmission, strong anti-interference ability and long transmission distance.
12. Exquisite and unique zero point, full scale, and nonlinear compensation ensure the accuracy and stability of the instrument within the range of operating conditions.
13. The Pressure Sensor directly senses the liquid level pressure and is not affected by the foaming and accumulation of the medium.
14. Wide range of tested media can be used, such as oil, water and paste, with certain anti-corrosion ability.
Classification of liquid level transmitters
1. Single flange liquid level transmitter
Single-flange liquid level transmitters have flat flanges and flange liquid level transmitters with insert barrels, both of which are suitable for single-flange liquid level transmitters that use the gravity of the medium to be measured to measure the height of the liquid level. For medium with high viscosity and easy crystallization, it is generally used in open containers or equipment installations.
2. Double flange liquid level transmitter
The double-flange liquid level transmitter is a Differential Pressure Transmitter, which provides a reliable measurement method to prevent the measured medium from directly contacting the isolation diaphragm of the transmitter. The main features are the need to isolate the high-temperature medium from the transmitter, the measurement medium has a corrosive effect on the sensitive components of the transmitter, the suspension liquid or high-viscosity medium, the measured medium solidifies or crystallizes due to changes in the environment or process temperature, and the measured medium is replaced It needs to be strictly purified to measure the first class. Double flange liquid level transmitter is mainly used in the measurement of liquid level in sealed pressure vessels.
3. Submersible liquid level transmitter
The submersible liquid level transmitter has rod type and arm type. Its principle is based on the principle that the measured liquid static pressure is proportional to the height of the liquid. It uses the piezoresistive effect of diffused silicon or ceramic sensitive elements to convert the static pressure into electricity. Signal. After temperature compensation and linear correction, it is converted into 4~20mA current signal output. Due to the characteristics of this transmitter, such as convenient installation, strong adaptability, etc., it can perform high-precision measurement from water, oil to paste with high viscosity, and is not affected by the foaming and accumulation of the measured medium. It is generally used in open Devices for mouthpieces or equipment.
Level Transmitter,Differential Pressure Level Transmitter,Submersible Level Transmitter,Level Gauge Wuxi Winsun Automation Instrument Co., Ltd , https://www.jswxwinsun.com
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NSK bearings are a fine mechanical support component; bearing users eagerly expect bearings mounted on the mainframe to not damage and maintain their dynamic function during the scheduled service period; but the objective facts are sometimes not perfect; sudden bearing failures will occur A significant loss to the user. After many rolling bearing failure analysis studies indicate; bearing short life or premature loss accuracy; some are due to data defects or improper production; but to a considerable extent due to the lack of strict bearing The device is used for protection and protection; or the bearing is not properly selected or the load exceeds the bearing's own additional load to cause abnormal damage to the bearing; for example; the fatigue of the bearing parts is largely due to the mixing of the lubricating oil. There are impurities that can be seen; to complete the rolling bearing has a longer life and accuracy persistence; in addition to the demand for bearing manufacturers to improve product quality; bearing users must also use scientific methods and procedures to use bearings; otherwise; no matter how good Bearings will also die under harsh and casual conditions.
Early failure modes of rolling bearings; mainly cracking, plastic deformation, wear, corrosion and fatigue; under normal conditions, the main touch is fatigue.
In order to better use the bearings; the professor pointed out that the following points should be emphasized:
Pre-operation 1 in front of the device. The selection and demanding device location of the installation site should be separated from the lathe, grinder and other mechanical equipment. The site should be cleaned and cleaned; often adhere to dry and hygienic; beware of iron filings, sand, dust and moisture entering the bearing.
2. Check the bearing type, prepare the device to check the bearing type, whether the scale can meet the requirements of the device; and according to the layout characteristics of the bearing and the various components that cooperate with it; select the appropriate device method; prepare the device for use and measuring tools Commonly used devices are hand hammers, copper rods, sleeves, special pads, screw mosquito clamps, presses, etc.; the amount has vernier calipers, micrometers, dial gauges, etc.
3. Inspect the appearance of the NSK bearing device on the outer surface of the bearing device and cooperate with the appearance of the parts; if there is bump, rust layer, wear debris, sand, dust and soil; one bearing device is difficult; the device orientation is incorrect, and the second is attached The object constitutes the appearance of abrasive and easily worn bearing; affects the quality of the device. Therefore, the external appearance of the journal, the housing hole of the bearing housing, the shoulder end face, and the cooperative appearance of the connecting parts such as bushings, washers, end caps, etc. Careful inspection. If there is rust layer; can be finely smashed; fine sand cloth light; together also remove the attachment of the bearing device and its attachment parts.
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Source: China Bearing Network Time: 2013-01-10