Dwyer MFS - Manual (Page 2)

Device description and intended use Series MFS
Technical changes reserved 2 08/2011
1 Device description and intended use
Series MFS sensors are used for continuously measuring flow rates or dosing electrically conductive liquids. The
operational safety of the supplied equipment is only guaranteed if it is operated according to its intended use
(measuring and dosing of liquids). The specified limit values (see the chapter “Technical Data”) should never be
exceeded.
It is the user's responsibility to select the appropriate technology which is suitable for the specific application, to
install it correctly, to carry out tests, and to maintain all the components.
The magnetic inductive flow sensor features no moving parts and is, therefore, almost wear free and suitable for
a wide range of measuring applications. A flow-proportional frequency signal is provided as the output signal.
Product label
Functional principle
The magnetic inductive flow sensor functions according to the induction principle:
The measuring pipe is located in a magnetic field (B). If an electrically conductive medium (V) flows through the
measuring pipe and, therefore, at right angles to the magnetic field, a voltage (U) which is proportional to the
mean flow velocity will be induced in the medium and subsequently picked up by the two electrodes.
Fig. 1: Functional principle
2 Safety instructions
Always read the operating instructions carefully prior to installing the new product. Always adhere to the
instructions contained herein, especially the safety instructions, otherwise there is a potential risk of personal
injury and damage to instruments and systems.
Even though assistance is provided through personal consultation or this manual, it is the responsibility of the
customers to determine the suitability of the product for the specific application.
The magnetic inductive flow sensors are state-of-the-art devices, concerning the accuracy, functioning and safe
operation of the device.
However, professional and safety conscious conduct of the operator is required to ensure safe operation.