INSTRUMENTATION • ELECTRONICS FLOW
hether in the pharmaceutical industry, water treatment or in food production, if conductive media such as cooling water
are added to a process, magnetic-inductive fl ow meters are usually installed for monitoring purposes. T is is particularly true in the context of dosing, where the measuring fl ow meters must possess precise response times and should also be easy to confi gure, otherwise incorrect dosing or insuffi cient repeatability will occur.
Although there are already many accurate devices for small and medium fl ow rates in the market place, they are often limited in functionality or lack fl exibility at the installation stage. Kobold Messring provides these features as standard with its fl ow meter duo, MIM and MIS. Due to the extensive options for on-site programming, they are suitable for cross-industry use, particularly for dosing applications. Confi gurable optical buttons can be used to display parameters such as fl ow rates or temperatures. A changing colour system in the display also warns of limit violations. Since the MIM model is the fi rst variant produced in a remote version, in which the display and electronics are not integrated in the sensor unit, the fl ow meter can also be used for media temperatures up to 140°C. For reference, magnetic-inductive
fl ow meters work without moving parts, unlike rotating vane fl ow meters, and for this reason they hardly show any signs of wear and tear. As a result, these devices have proven to be eff ective in measuring the fl ow of conductive media – such as water, pulps and pastes, juices or emulsions. However, this wide range of applications also leads to very diff erent
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In the remote version of MIM, the unit in contact with the medium only contains the sensor
MEASUREMENT 4.0 W
For precise dosing of even the smallest quantities, a new range of electromagnetic fl owmeters provide precise readings in a minimum of space
installation situations, since the measuring instruments are used in various industries and processes.
T e nominal size of the connected pipes, possible orientation during
installation and integration into certain process chains, such as dosing of media during coating of tablets or during coolant supply, infl uence the choice of a suitable fl ow meter. T is is especially true in the context of dosing processes where the measuring instruments must off er the possibility of programming intermediate values to document the quantities, and to avoid inaccurate dosing. In addition, the display should be multi-line and clearly visible so that the plant engineers are warned in good time before exceeding a limit value. Often however, fl owmeters only meet some of these requirements, and often at the expense of usability. For this reason, Kobold developed the
products MIM and MIS; universal fl ow meters incorporating IO-Link to meet Industry 4.0 requirements (if or when required), which are suitable for almost any measuring situation and guarantee high programming freedom in addition to good response times of sometimes less than 100 milliseconds. T e many functions such as temperature measurement or dosing are performed accurately, which can be set in just a few steps in the program menu with the hot key buttons. And the robust and fl exible design enables simple and clear installation, even in tight-fi tting pipe systems.
INSTALLATION IN EXTREME CONDITIONS T e two models are made entirely of durable materials, the MIM in stainless steel. In addition to the temperature
measurement function, which only MIM has, the devices diff er mainly in relation to the pipe sizes at which they are used. While MIS is suitable for nominal sizes DN 80 and DN 100 or 3in and 4in, MIM can be used for very small nominal pipe sizes and covers an even larger measuring range, depending on the nominal size – from 30ml /min upwards. T e fl ow meters have two individually confi gurable outputs that can act as a pulse, alarm or analogue output, depending on the setting. T is makes them easier to integrate into diff erent processes or auxiliary circuits. T e colour multi-display can also rotate digitally in 90° increments, so that when changing location, no other model is required, and the display is independent of the position of the connections.
T e response time has now been
improved to facilitate more precise dosing quantities. In addition, diff erent subsets can be programmed via the menu ito avoid needing to navigate awkwardly with each new setting through the menu. Precisely measured quantities and a very good response time are indispensable, especially for sensitive processes such as tablet coating. To ensure that this possibility is also
available for hot media and in extremely temperature-controlled environments such as cooling water circuits, Kobold is off ering for the fi rst time a device in remote version. Unlike conventional devices, the media- contacting unit only contains the sensor. T e entire electronics, the control and display, are housed separately and connected via a cable at a safe distance to the sensor unit on the pipe. As a result, even temperatures up to 140° C are not a problem and the fl ow meter can work trouble-free because the electronics remain protected.
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