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D-67466 Lambrecht
Tel.: 06325/188 - 01
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NVM/... and NEM/... level controllers

 
  Magnetically controlled units for the automatic control of liquid levels
 
 

Mounting and mode of operation of the NVM/... and NEM/... level controllers

The NVM/... and NEM/... level controllers are fitted with a float and a float rod to which a magnet is attached to the opposite end from the float. The float follows the level of the liquid and moves the float rod inserted through the screw-in threaded nipple of the unit up or down. Above the nipple a guide tube is attached for the float rod and the magnet, and adjustable magnetic switches are mounted on the outside of the tube. These magnetic switches have so called bistable characteristics; i.e. they remain in the switching status caused by the influence of the passing magnet and only switch over when the magnet passes by in the opposite direction.

 
  With the types NVM/... the guide tube is made of transparent PVC, which permits direct visible indication
of the liquid level. With the types NEM/... it is made of stainless steel.
 
 

These units are not suitable for use in turbulent liquids (e.g. in stirrer tanks) nor for use on vibrating machines or in places at risk from shock or vibration.

 
 

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