About the insertion electromagnetic flow meter , how much do you know?

      As we all know , insertion electromagnetic flow meter is a kind of electromagnetic flowmeters. In addition of that, how much do you know about the plug-in electromagnetic flow meter? Today, i will introduce the inserted flow meter as follows:

1. Product Outline Drawing

2.Product Function and Scope of Application

     Plug-in electromagnetic flow transducer (“transducer” for short) and electromagnetic flow transverter (“transverter” for short) are combined to be plug-in electromagnetic flowmeter (“flowmeter” for short), which is used to measure the volume flow rate of various conducting liquid in the pipeline.

The transducer has the following characteristics:
  ◆ No moving parts, simple structure and reliable operation
  ◆Plug-in structure allows convenient installation and dismounting without cutting off the water supply under the condition of low pressure. Therefore, it is suitable for all existing pipelines and convenient for instrument maintenance.
  ◆Measurement accuracy may not be affected by the variation of physical parameters such as temperature, pressure, density, viscosity, conductivity (as long as it is greater than 5µs/cm) etc.
   ◆The transducer almost has no pressure loss, leading to very low energy loss.
   ◆It has less manufacturing and installation cost than other electromagnetic flowmeters, so is particularly suitable for measuring the liquid from pipelines of medium or large diameter.
   ◆The advanced low frequency square wave excitation is used, resulting in stable zero point, good capacity of resisting disturbance, and reliable operation.
   ◆Large measurement range. The pipeline full scale flow rate can be randomly set within the range from 1m/s to 10m/s. The output signal and flow have a linear relation.
   ◆The flowmeter (except battery-powered one) has two kinds of current output: 0~10mA◆DC and 4~20mA◆DC and 1~5kHz frequency output.

      With the above advantages, the flowmeter (transducer) has been widely used for conducting liquid measurement and production automatic control in different industries including chemical engineering, chemical fiber, metallurgy, chemical fertilizer, paper making, water supply and drainage, wastewater treatment and agricultural irrigation. 

3. Product Model and Composition

Product model: plug-in type. It is connected to the pipeline using mounting base, ball valve, gland nut and positioning screw.

4. Major Technical Features

4.1 Applicable pipe diameter:
    200~2000mm;
4.2 Flow rate measurement range:
    0~1 to 0~10m/s; it is continuously adjustable within the range from 1m/s to 10m/s under the condition of full scale flow.
4.3 Accuracy of measurement
When full scale flow>1m/s, the measurement accuracy = ±1  5%.

4.4Conductivity of measured medium:
    More than 50μs/cm.
4.5Operating pressure:
   1.6Mpa
4.6 Electrode material:
   Molybdenum stainless steel 0Cr118Ni12Mo2Ti, Hadtelloy Alloy c-276, Ti etc.
4.7Measuring tube (measuring head) materials:
   ABS
4.8 Maximum temperature of measured medium:
   ABS60℃
4.9 Enclosure protection class:
   Conform to IP68-related provisions of GB-08-84 standard.
4.10 Transducer output signal:
   0.209mVp-p/1m/s
4.11Maximal signal transmission distance between transducer and transverter: 50 m (Please contact with the manufacturer for special requirements)
4.12 Flowmeter output signal:
DC: 0~10mA with load resistance of 0~1kΩ
          4~20mA with load resistance of 0~500Ω
Frequency: 1~5KHz with load resistance of 250~1.2kΩ


5. Operating Principle

The transducer is actually a measuring meter for liquid flow rate measurement and it is made according to Faraday's law of electromagnetic induction. 
Insert the transducer with a long pole to the specified location inside the measured pipeline. When the conducting fluid passes the transducer magnetic field (when the transverter sends exciting current to the transducer, a magnetic field will appear in the excitation system that is constituted of excitation coils), it is equivalent to that the conductor is cutting the magnetic-curves. According to Faraday's law of electromagnetic induction, electromotive force will be produced at both ends of the conductor. And the electromotive force can be detected through the electrode that contacts the liquid. It is directly proportional to the magnetic induction intensity B, distance between two electric poles, and mean flow rate of the liquid, namely:
E=B·L·V(volt)       ①
where,   E------electromotive force, Volt;
         B------magnetic field intensity, Tesla;
         L------distance between two electric poles, meter;
         V------flow velocity, m/s;
         K------coefficient

     There are also some requirements for the installation and application of plug-in electromagnetic flowmeters. If you want to know more information about the insertion electromagnetic flow meter , please click our website and contact us: http://www.aft-flowmeter.com

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