NV Level Switch

The KOBOLD level switch model NV is a reasonably-priced compact instrument for monitoring levels. A stainless steel cylindrical float attached to one end of a balance arm moves up and down with the liquid level. 

The motion of the float is transferred to a permanent magnet fitted at the other end of the balance arm. 

The permanent magnet switches a reed contact that is fitted in a sliding tube outside the medium. The tube is set as a N/O contact at the factory, that is, the contact closes when the level rises. The switching function is reversed by moving the tube. 

The instruments are delivered in standard sleeves for side installation. PTFE tape is used to seal the switch.