Is the LXB 200A an electromagnetic flowmeter?

Probably not, the model number of the glass rotameter is LZB

The model of the electromagnetic flowmeter is selected according to the on-site working conditions, because the selection sample book of each factory is inconsistent, so the models are also diverse, so how to select the electromagnetic flowmeter, you need to pay attention to the following points:

Electromagnetic flowmeter selection method].

1.Flow rate, full flow, range and diameter: The diameter of the selected electromagnetic flowmeter is not necessarily the same as the pipe diameter, and should depend on the flow rate.

2.The process industry transports liquids with different viscosities, such as water, and the pipeline flow rate is generally an economic flow rate. The electromagnetic flowmeter is used on such a pipe, and the diameter of the sensor is the same as the diameter of the pipe.

The liquid flow rate of the electromagnetic flowmeter can be selected in the range of 1 10m s when the full flow rate of the electromagnetic flowmeter is relatively wide. The maximum flow rate is in principle unlimited, however it is generally recommended not to exceed 5 ms, unless the lining material can withstand the washout, which is rarely exceeded in practical applications and even rarer in excess of 10 ms.

3.The lower limit of the flow rate of the full flow rate is generally 1m s, and some models of electromagnetic flowmeters are. For some new projects with low flow rate or low flow rate in the early stage of operation, from the perspective of measurement accuracy, the diameter of the electromagnetic flowmeter should be changed to be smaller than the pipe diameter and connected with a reducer.

For fluids with easy adhesion, deposition, scaling and other substances, the flow rate is not less than 2m s, and the flow rate is increased to 3 4m s or more, which plays the role of self-cleaning and preventing adhesion and deposition. For abrasive fluids such as slurry, the common flow rate should be less than 2 3m s to reduce the wear of the lining and electrode. When measuring liquids with low conductance that are close to the threshold, the lowest flow velocity is selected as much as possible (less than, as the flow noise increases due to the increase in flow rate, and the output sloshing occurs.

4.The caliber of the stereotyped products that can be provided in China is from 10mm to 3000mm, and the practical application is still mostly small and medium-aliber, but compared with most of the other principle flow meters (such as volumetric flowmeters, turbine flowmeters, vortex flowmeters or Coriolis mass flowmeters, etc.), large-diameter instruments occupy a large proportion. Among the nearly 10,000 instruments of an enterprise, the small diameter below 50mm, the medium diameter of 65 250mm, the large diameter of 300 900mm, and the super large diameter of more than 1000mm account for % and 3% respectively.

According to the structure, the electromagnetic flowmeter is generally divided into integrated and split. （tsd-f,tsd-y）

In the integrated type, the sensor and converter are installed together, while in the split type, the sensor is installed at the measuring point and the converter is installed in a separate instrument box or centralized station room.

According to the installation method, it can be divided into flange type, clamp type, clamp type, insertion type, etc.

The instrument part of the flange type is connected with the process management by two flanges, and is fixed by bolts, which is the most common connection method, which is reliable and suitable for long-term work and less dismantling;

The clamp type is mostly used in the sanitary industry, and it adopts a standard clamp disc for installation, which is easy to install and disassemble, and can be easily disassembled and cleaned flowmeter;

The clamp type is also called the clamping type, the instrument body does not have connectors, the instrument is installed between the two pieces of the process pipe between the clamping flanges during installation, and the two flanges are connected by multiple groups of through-type long bolts, and the instrument is clamped in the middle, this kind of connection mode is relatively rare, and the main advantage is to save two pieces of flanges, and the installation is relatively simple;

Plug-in type is mostly used for large-caliber products, because after the large-caliber product is installed, it is difficult to disassemble for the flowmeter, which needs regular maintenance and calibration, and it is very inconvenient if it is disassembled, so it is very convenient to apply the plug-in electromagnetic flowmeter, and the flowmeter can be easily extracted from the pipeline, cleaned and calibrated.

Depending on the industry, there are high-voltage type, hygienic type, battery-powered type, etc.

The high-pressure type is a special electromagnetic flowmeter, which is mostly used in the water injection industry in oil drilling, and its water injection link requires a very high pressure, with a maximum pressure of 42MPa, which has high requirements for the performance and safety of the flowmeter.

The hygienic type is mostly used in the food and beverage industry, and it is mostly connected by clamps, and the main structure of the instrument is all made of food-grade stainless steel, which is hygienic and easy to clean.

Battery-powered type, this type of instrument is mostly used for single-point measurement, used in occasions where outdoor power supply is inconvenient, and it is powered by the battery to the meter, and the transmission signal mostly uses GPRS remote transmission.

Specifically, you can learn about TSD electromagnetic flowmeters, which are available in many types of electromagnetic flowmeters.

It is nothing more than to consider the following points: 1. Flow, according to the maximum flow rate to decide how much scale flow meter to choose. 2. Determine the caliber of the flowmeter according to the flow rate and the size of the industrial pipeline.

Generally, a flow meter that is consistent with the pipeline is selected. 3. According to the characteristics of the measured medium, select the lining of the flowmeter. For example, temperature, corrosiveness, whether there may be negative pressure in the pipe, etc.

Generally, the lining is PTFE, soft rubber, hard rubber, PFA, ceramics and so on. 4. Select the material of the measuring electrode according to the characteristics of the medium. Generally, there are , Hastelloy, titanium, tantalum, etc.

5. Select the pressure level of the flanges connected on both sides according to the pressure level of the process pipeline. 6. Select the protection level, if the sensor is under water, you need to select IP68The above is the sensor part.

Then there's the transmitter part. 1. According to the requirements of the installation location, determine whether to choose the integrated type or the split type. 2. What type of output is required, 4-20 mA signal, HART, PROFIBUS PA, FF, etc.

3. Whether explosion-proof requirements are required. Determine the explosion protection level.

Less than 50mm diameter, working pressure is; 900mm caliber, working pressure of 1MPa; More than 1000mm diameter, the working pressure is.

In special cases, such as liquids with solid particles, the usual flow rate of 3m s can be selected for the abrasion situation, for easy-to-manage fluids. A flow rate of 2 ms is optional. The range of the transmitter can be selected according to two principles:

First, the full-scale range of the instrument is greater than the expected maximum flow value; Second, the normal flow rate is greater than 50% of the full scale range of the instrument to ensure a certain measurement accuracy.

1. It cannot be used to measure gases, vapors and liquids containing a large amount of gas.

2. It cannot be used to measure liquid media with very low conductivity, such as petroleum products or organic solvents and other media, and the electromagnetic flowmeter is not yet powerless.

3. Due to the limitation of the lining material and electrical insulation material of the measuring tube, the electromagnetic flowmeter for ordinary industrial use cannot be used to measure high-temperature medium; It cannot be used for the measurement of low-temperature media without special treatment to prevent condensation (frosting) outside the measuring tube from damaging the insulation.

LDE type intelligent electromagnetic flowmeter.

1.Understand the process parameters.

1) Know the name of the liquid to be tested (provided by the user).

2) Know the maximum flow rate, common flow rate, and minimum flow rate (provided by the user) of the liquid to be measured

3) Understand the process pipe diameter (provided by the user).

4) Know the medium temperature (provided by the user).

5) Know the medium pressure (provided by the user).

6) Know the conductivity of the fluid being measured (provided by the user).

7) Find out if there is a negative pressure situation (provided by the user).

2. Preliminary selection.

1) According to the name and nature of the measured medium, determine whether to use an electromagnetic flowmeter (determined by the salesman).

Note: Electromagnetic flowmeters can only measure the flow of conductive liquids, while gases, oils, and most organic liquids are not included in the general conductive liquids.

2) Determine the electrode material according to the learned properties of the medium.

Note; The company generally provides four electrodes, such as stainless steel, Hastelloy, titanium and tantalum, which electrode should be selected according to the properties of the medium to check the relevant data manual.

2) According to the temperature of the medium learned, determine whether to use rubber or PTFE lining (determined by the marketer).

Note: The temperature resistance of rubber shall not exceed 80C;

PTFE is temperature resistant to 150C, and can withstand 180C instantly;

Municipal wastewater can generally be lined with rubber lining and stainless steel electrodes.

3) According to the known medium pressure, select the flange specification of the table body (determined by the marketer).

Note: The electromagnetic flange specification is usually when the diameter is DN10 250, the flange pressure is rated;

When the diameter is made of DN250 1000, the flange is rated for pressure;

When the actual pressure of the medium is higher than the corresponding range of the above-mentioned pipe diameter pressure, it is a special order, but the maximum pressure shall not be exceeded.

4) Determine the conductivity of the medium.

Note: (1) The conductivity of the electromagnetic flowmeter shall not be less than 5us cm

2) The electrical conductivity of tap water is about tens to hundreds of us cm, general boiler soft water (deionized water) conducts electricity, and pure water (highly distilled water) does not conduct electricity.

3) The conductivity of gases, oils and most organic liquids is much lower than 5us cm and does not conduct electricity.

3 Understand user requirements.

1) Understand whether it is a combined in-place display or a split remote transmission display (provided by the user).

Note: Please know the maximum distance when displaying for split remote transmission, the maximum distance for separation is 100 meters.

2) Find out if you need additional features (provided by the user).

Note: 1. The electromagnetic flowmeter itself has the functions of upper and lower limit flow alarm, frequency and current output, and no special order is required.

2. There are two kinds of sealing protection levels for the shell of electromagnetic flowmeter: IP65 and IP68, and it is a special order when choosing submersible IP68.

3. When the electromagnetic flowmeter is to be connected with the computer, it is necessary to add RS 485 communication port, which is a special order.

4. Selection: After passing the above steps, the model specifications of the electromagnetic flowmeter can be finally determined.

and Shunda electromagnetic flowmeter.

1. Accuracy level.

The accuracy level and maximum allowable error of the flowmeter within the specified flow range shall be in accordance with the provisions of Table 1. Flowmeter error indicates the relative indication error used.

2. Citation.

The reference error can also be used for the indication of the error of the flowmeter for instantaneous flow indication, and the maximum allowable error series shall be in accordance with the provisions of Table 1, and the accuracy grade shall no longer be given in the tender of the verification results, but its maximum allowable error shall be used, and the maximum allowable error shall also be marked with fs, such as .

3. Error representation method and selection principle.

In a verification of a flowmeter, the error representation method of the flowmeter should be given according to one of the accuracy levels and reference errors; For flowmeters that use a combination of relative indication error and reference error to represent the error, a unified method should also be used to express the error in a single verification.

4. Reproducibility.

The repeatability of the flow meter shall not exceed 1 3 of the absolute value of the maximum permissible error specified in the corresponding accuracy class.

Shaanxi Weinan and Shunda electromagnetic flowmeter.

Xuner Instrument will answer for you:

1 Structure and accuracy level.

The structure and accuracy level of the electromagnetic flowmeter should be selected according to the actual needs.

In general chemical, metallurgical, textile, water supply and sewage treatment industries, general-purpose electromagnetic flowmeters are mostly used; For places with a high atmosphere, explosion-proof electromagnetic flowmeter should be selected; For food, medicine and serialization industries, sanitary electromagnetic flowmeters should be selected; When used for open channel flow measurement or non-full pipe culvert flow measurement, submersible electromagnetic flowmeter should be selected; If it is used for the flow rate of a closed pipe that is not full pipe, an electromagnetic flowmeter that is not full pipe can also be used. The accuracy level should be reasonably selected according to the need. Some high-precision electromagnetic flowmeters, with a basic error of , can be used for the medium accounting of expensive media; The electromagnetic flowmeter with low accuracy has a basic error of , which can be used in places where the measurement accuracy is not very high (such as no measurement and accounting, only for the purpose of control, only high reliability and excellent repeatability are required).

Excessive pursuit of high accuracy can lead to unnecessary waste.

2. Flow rate and flow rate.

The diameter of the electromagnetic flow sensor should be reasonably selected according to the flow rate and flow rate, and it does not have to be the same caliber as the process pipeline. If the general industrial pipeline transports fluids with low viscosity such as water, the flow rate is generally designed in the economic flow zone. Between.

ISOIL flange type electromagnetic flowmeter. The flow of fluid through the probe will cause a certain vortex and generate signal fluctuations. The surface of the probe is not a plane, but a special curved surface, which has a diversion effect, which inhibits the generation of vortices and stabilizes the signal.

Specifically, you need to take a closer look at the technical engineer.

The choice of lining depends on the temperature, and the lye PTFE lining is OK.

The most important points in the selection of flowmeters:

1.Medium. 2.Temperature.

3.Connect. 4.Flow rate.

The measurement principle of TK-LDE electromagnetic flowmeter is an inductive instrument that measures the volume flow rate of conductive medium in a tube by Faraday's law of electromagnetic induction, and adopts single-chip microcomputer embedded technology to achieve digital excitation, and at the same time adopts CAN fieldbus on the electromagnetic flowmeter. It is the first in China, and the technology has reached the leading level in China.

Alkaline media are lined with PTFE

Glad to answer for you, Endershaus is good.