In general, electromagnetic flowmeters are used in water, waste water and similar areas that have electrical conductivity. Most significant advantage of electromagnetic flowmeters is they have not any moving part and therefore they need minimum maintenance.
Electromagnetic flowmeters work according to Faraday’s law of induction. A fluid which has electrical conductivity passes through a magnetic field in an electrically insulated pipe. A couple of coils are used to generate magnetic field and electric current is passed through these coils. A voltage is generated between electrodes directly proportional to the velocity of the fluid. This generated voltage is changed depending on flow rate (Q), flow velocity (v), geometric correction factor also known as body coefficient (k), magnitude of magnetic field (B) and inner diameter of flowmeter (D).
Q=f(v,k,B,D) and Q=v*(k*D*B)
Magnetic field, inner diameter and body coefficient are constant values. Therefore, the equation may be expressed as;
Q= v*(k*D*B)=v*K and it is observed that a linear regression observed between generated voltage and flow velocity.
Voltage signals perceived by electrodes are converted into an understandable form by a signal converter.
ETRANS-M 110 : Sandwich type economic, Teflon ( PTFE) inner body coated flowmeter.
ETRANS-M 210 : Flanged type flowmeter specific for water and waste water applications, inner body coated with hardrubber, WRAS approved.
ETRANS-M 220K : Battery powered type flowmeter. It is ideal for measuring water and waste water in areas there is no mains electricity.
ETRANS-M 410 : Flowmeter with teflon (PTFE) inner body coating, resistant against corrosive fluids vacuum and high temperatures for challenging application.
ETRANS-M 610 : Sandwich type flowmeter with different process connection alternatives, for industries require sterile applications such as pharmaceutical and food industries.
ETRANS-M 810 : Ceramic coated sandwich type flowmeter, high precision and excellent resistance against corrosion.