Level Control Apparatus, Three Term Electronic

Level Control Apparatus, Three Term Electronic

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Description of Level Control Apparatus, Three Term Electronic

This Level Control System is designed to allow numerous level control experiments to be performed within a typical laboratory session. The unit enables students to investigate the effects of changing the parameters of the control algorithm and changes can be made to the process conditions by adjustment of the flow into the vessel. This invention relates to an improved type of electronic liquid level control apparatus, yand more particularly toa relatively A simple electronic type 'of controller which may be utilized to maintain substantially accurate liquid levels, within small liquid receiving chambers. Many of the present-forms of liquid level ycontrollers are of a type which are not suitable A for use with very small liquid receiving chambers, such as -may be used 'in laboratory apparatus or pilot plants, or they are not adapted for use with extremely high pressure'equipment because of yinadequate packing glands or sealing means. Still other types of liquid level 'controllers are adapted to operate overa relatively wide range of level variations and are not sensitive to small changes ,in liquid' level.


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