Application conditions and brief introductions of several commonly used flowmeters

Electromagnetic flowmeters generally operate normally for a long time without maintenance after installation, and then require maintenance and daily inspection.

Coriolis mass flowmeters are versatile instruments capable of measuring various types of media, including:

Nominal diameter： DN15-DN200mm
Accuracy： 1.0/1.5
Body material: Aluminum alloy, 304 stainless steel
Applicable media: Compressed air, oxygen, nitrogen, carbon dioxide, natural gas, argon, liquefied gas, etc., corrosion, moisture can not be measured, such as chlorine, hydrogen, steam, ammonia.

Vortex flowmeter is also known as Karman vortex flowmeter. Vortex flowmeter is a kind of separation flowmeter made by using the principle of natural oscillation of fluid. When a fluid flows at a sufficiently large velocity through an object perpendicular to the direction of the fluid, if the object is of appropriate size, it will produce a neatly aligned and reversed vortex train behind the object along two parallel lines.

Liquid turbine flowmeter is a kind of precision flow measuring instrument, which can be used to measure the flow and total amount of liquid with the corresponding flow integrating instrument. Liquid turbine flowmeters are widely used in measurement and control systems in petroleum, chemical industry, metallurgy, scientific research and other fields. Liquid turbine flowmeters with sanitary fittings can be used in the pharmaceutical industry.

What are the external interference problems of the electromagnetic flowmeter for domestic wastewater

Thermal gas mass flowmeter, gas flow measurement without temperature and pressure compensation, measurement is convenient and accurate.

A liquid turbine flow meter is a type of flow meter designed to measure the flow rate of liquid substances, such as water, chemicals, or petroleum-based fluids. It operates on the principle of a turbine inserted into the flow stream. As the liquid flows through the meter, it causes the turbine to rotate. The rotational speed of the turbine is directly proportional to the velocity of the liquid, allowing for accurate measurement of the flow rate.

With the widespread use of thermal gas mass flowmeters, many customers do not know much about this flowmeter, today Aister explains the advantages of thermal gas mass flowmeters:

Sewage flowmeter can be widely used in municipal water supply, steel, petroleum, chemical, electric power, industry, water conservancy, water resources and other departments of liquid volume flow measurement, especially suitable for channels, small river flow measurement and environmental protection disposal of sewage measurement.

Electromagnetic flowmeters, also known as magmeters or magnetic flowmeters, typically generate electrical output signals proportional to the flow rate of a conductive fluid passing through a pipe. The most common output signals from electromagnetic flowmeters include:

Measuring range ±0.03 ft/s ~ ±40 ft/s (±0.01 m/s~ ±12 m/s)
Accuracy ±1%
Diameter range 1″~48″(25mm~1200mm)
Measuring medium Single conducting liquid medium
Measurable pipe Carbon steel, stainless steel, PVC pipe or other dense sound conductive pipe
Output Analog output: 4~20mA, maximum load 750Ω, Modbus: RS485
SD card storage 16G
Set the storage interval 1 ~ 99999 s
Keyboard Digital film keying
Display screen  240*128 LCD display (with backlight)
Power source Rechargeable lithium battery with 3000mAh battery capacity. Under normal use, a full charge can be used for 16 hours.
Operating temperature Transmitter: -40℃~ 60 ℃, sensor: -40℃~80℃, standard type; The range from -40 ° C to 130 ° C is optional
Measure the ambient relative humidity 0-99%
Protection class Transmitter IP65, sensor IP68
Cable Twisted pair shielded cable, standard length of 5 meters

The installation direction of the electromagnetic flowmeter is not particularly strict requirements, generally horizontal, vertical or inclined can be unlimited. However, it must be reminded that in order to ensure that the pipeline is full of the measured medium, that is, the “full tube” state, it is recommended to install vertically, flow from bottom to bottom, especially for liquid-solid two-phase fluids, it must be installed vertically. If the site only allows horizontal installation, it must be ensured that the two electrodes are in the same horizontal plane, and the axis of the electrode must be approximately horizontal, because the electrode at the bottom is easily covered by sediment, and the top electricity is easily wiped by the occasional bubble in the liquid, covering the electrode surface and making the output signal fluctuate. The following lists the matters that need attention in the installation of electromagnetic flowmeters:

The grounding ring is a crucial component in the installation of an electromagnetic flowmeter as it helps establish proper grounding and ensures accurate and reliable measurements. Here’s a general guide on how to install an electromagnetic flowmeter grounding ring:

As a very special medium, steam will show special phenomena and problems in the process of vortex flowmeter measurement. The key problem is that the vapor density value deviates too much from the design value, which brings significant measurement errors to the measurement results. At present, the mature density measuring instrument has not been successfully applied, which brings certain difficulties to the steam flow measurement.

During the production and operation of the intelligent split-type sewage electromagnetic flowmeter, various faults may occur. 1. Instrument indication errors caused by faults in the instrument itself, including damage to the structural components or parts of the instrument, etc.

Ultrasonic flowmeter in view of different installation methods, then the requirements for installation are also different, today the flowmeter manufacturer Aister meter mainly for the installation requirements of different installation methods of ultrasonic flowmeter, for you to make the following explanation.

The precession vortex flowmeter adopts the new micro processing technology, which has the advantages of strong function, wide flow range, simple operation and maintenance, convenient installation and use. Widely used in petroleum, chemical, electric power, metallurgy, coal and other industries of various gas measurement.

The selection of flue gas flowmeter is a complicated but critical process, which is directly related to the accuracy of measurement results and the reliability of equipment. Here are some of the main factors to consider in the selection process:

1. Vibration effect

Compressed air is generated by air compressor or high pressure fan. When these devices are in operation, they all have varying degrees of vibration, and sometimes the vibration is relatively strong, and this vibration is transmitted through the connecting pipe. When selecting and determining the position of the vortex flowmeter, this influencing factor should be fully considered. In various detection methods, the anti-vibration performance of the instrument is not the same due to different detection components. For the vortex street of the detection element, the vibration resistance can reach 0.5~1G. When determining the installation position of the vortex flowmeter, it should be as far away from the power equipment such as air compressors and fans as possible.

the versatile applications of liquid turbine flowmeters span industries such as water management, chemical manufacturing, pharmaceuticals, oil and gas, and HVAC systems. Their ability to deliver accurate and real-time liquid flow measurements makes them indispensable for enhancing efficiency, safety, and precision in a wide range of industrial processes.

Connection mode：Thread, clamp, flange, clamp type
Accuracy：±1%R、±0.5%R、±0.2%R (to be customized)
Sensor material：304, 316 stainless steel, etc
Use conditions： Medium temperature：-20℃～+120℃  Ambient temperature：-20℃～+60℃
Relative humidity：5%-90%         Atmospheric pressure：86Kpa～106Kpa
Signal output function：Pulse signal, 4-20mA signal
Communication output function：RS485 communication, HART protocol, etc
Working power supply：External power supply: 24VDC±15%, ripple ≤±5%, suitable for 4-20mA output, pulse output, RS485, etc
Internal power supply: 1 set of 3.6V10AH lithium battery, the battery voltage can work normally at 2.0-3.0V
Signal line interface：Basic model: Hausmann connector or three-core cable; Explosion-proof type, internal thread M20*1.5
Explosion-proof class：Exia II CT or Exd II BT6
Protection class：IP65 or higher customizable

The working principle of electromagnetic flow meter:

During the operation of the intelligent electromagnetic flowmeter, the empty pipe alarm situation is often encountered. The so-called empty pipe alarm of the electromagnetic flowmeter refers to checking whether the measured liquid fills the controller’s measuring tube and detecting the cause of the empty pipe alarm.

High voltage electromagnetic flowmeters are commonly used in applications where the measurement of electrically conductive fluids is required. These flowmeters operate based on Faraday’s law of electromagnetic induction and are suitable for a variety of industrial processes. Here are some key application characteristics of high voltage electromagnetic flowmeters:

Today we bring you an introduction to the cleaning method of the plug-in electromagnetic flowmeter.

Nominal diameter: DN15～DN300mm
Accuracy: liquid ±1.0%, gas (steam) ±1.5%, plug-in ±2.5%
Structure form: Integrated, split, temperature and pressure compensation
Applicable medium: liquid, gas, saturated steam, superheated steam

In order to solve the problem of leakage caused by poor measurement accuracy or inability to measure below the lower limit of the instrument, a new type of thermal gas mass flowmeter is developed based on the theory of forced convection heat transfer and the principle of hot wire anemometer. The sensitivity of the instrument is greatly improved and the dead zone of the instrument is reduced by using microfilament structure in the sensitive element and the velocity measuring heating element.

Environmental monitoring is another domain where electromagnetic flowmeters prove valuable. In applications related to ecological studies and environmental research, these flowmeters aid in measuring water flow in rivers, streams, and other natural water bodies. The data obtained contributes to a better understanding of ecosystems, water resource management, and environmental conservation efforts.

Measuring Range： Max 15m/s
Conductivity： >5us/cm
Protection Class： IP65(Standard); IP68(Optional for remote type)
Process Connection： Flange (Standard), Wafer, Thread, Tri-clamp etc (Optional)
Output Signal： 4-20mA/Pulse
Communication： RS485(Standard), HART(Optional),GPRS/GSM (Optional)
Power Supply： AC220V (can be used for AC85-250V)
DC24V (can be used for DC20-36V)
DC12V (optional), Battery Powered 3.6V (optional)
Power Consumption： <20W Alarm： Upper Limit Alarm / Lower Limit Alarm Self-diagnosis： Empty Pipe Alarm, Exciting Alarm Explosion Proof： ATEX

The choice of water flow meter is a comprehensive consideration process, involving many aspects of factors. Here is a guide to tap water flow meter selection to help you choose the most suitable solution:

1. The gas flow measurement does not need temperature and pressure compensation, and the measurement is convenient and accurate. The mass flow rate or standard volume flow rate of the gas can be obtained.