Relays take control of fluid levels
A
Finder product story
Edited by the Engineeringtalk editorial team
Dec 1, 2003
Offering universal features in an easily wired, compact construction, 72 series level control relays provide a simple solution to the widest range of level control requirements.
Offering universal features in an easily wired, compact construction, Finder's 72 series level control relays provide a simple solution to the widest range of level control requirements.
Designed to maintain the level of conductive liquids either about a single level or between high and low levels, the devices are aimed at OEMs, panel builders and the utilities.
Application areas include the control of levels in dispensing and vending equipment, high and low limit level control in storage holding tanks and overflow reservoirs, and ice bank control in refrigeration equipment.
Traditionally such controllers use internal contacts in the associated probe circuitry.
However due to the exceedingly low current levels in the probe, reliability can be compromised, particularly under conditions of mechanical shock and vibration, or in polluted environments.
In contrast, Finder's design uses no such contacts, but continuously interrogates the state of the probe circuits under the control of a programmable micro and custom firmware - eliminating these shortcomings.
Offering versatility, Finder's 72 series level control relays are supplied in the form of a standard 35mm-wide DIN rail mounting module, with a high capacity 16A output switching capability and optional adjustable settings.
Selectively, the devices can be deployed in filling or emptying applications, and as such offer "fail to safe" condition in any application.
An optional switch selectable operational delay can be used to prevent "hunting" in applications where level changes are slow or surface disturbed.
Similarly, the sensitivity of the devices is adjustable, allowing tuning of the switching point to ignore for example, surface froth.
For totally safe operation, the control relays feature double insulation between the supply, contacts and electrodes.
With its high performance and standard format, Finder's competitively priced 72 series level control relays offer the ideal universal package for a wide range of level control applications.
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