Enraf is a trade name. This gauge is, in principle, a float operated by an electric motor. If the level rises, the tension in the cable drops or sags
In contrast to previous methods, this name does not give the principle on which the gauge works. Enraff is a trade name. This gauge is, in principle, a float operated by an electric motor. The operation is as follows, see figure. If the level drops, the float drops and pulls the lever on the motor slide down. The top contact is now closed and the motor lowers the float until the lever breaks the top contact. If the level rises, the tension in the cable drops or sags. The force of the spring will dominate, and close the lower contact. As a result, the motor pulls the cable tight and lifts the float until the contact is broken again. The level is taken from a counter attached to the motor. The operation of the level gauge can be checked by using a button th This level gauge is commonly used because it is very accurate, has a wide measurement range and works almost independently of the specific mass of the liquid.
at closes the pick¬up contact and pulls the float out of the liquid. As soon as the button is released, the float should fall until it floats on the liquid again. If the gauge is operating properly, the counter should read exactly the same as before the button was pushed.
