Conductive Limit Switches Manufacturer in India

SALIENT FEATURES :

• No moving parts, so free from maintenance.
• No special cable required for signal transmission, so Economical to Install.
• Long cable connections permissible between probe and evaluation unit.
• AC on probes for prevention of electrolytic deterioration of electrodes.
• Low voltage on probe for operational safety.
• Variety of control functions and installation systems available.
• Two -point action for automatic pump control.
• Two-point independent switching.
• Three-point switching, two points with pump control logic and one independent point with or without settable delay for probe covered or uncovered condition.
• Four-point switching with two pump control logic.
• Variety of probes available for various process conditions.

APPLICATIONS :

Switching off pumps when tank is full, to avoid overflow. For maintaining a constant level to avoid material wastage. For switching off pumps when running dry and indicating an empty tank to avoid wear and tear and production stoppage.

USAGE :

Levtester SLW… series of level switches are successfully used in processing plants for conductive liquids of conductivity not less than 25 µ Siemens in Food, Power, Chemicals, Sugar, Detergents, Steel, Minerals, Textiles, etc.

PRINCIPLE OF OPERATION :

A low AC voltage is applied between the probe electrode and the tank wall (or reference electrode in case of insulated tank). When the liquid comes in contact with the electrode tip, a conductive path is established between the sense electrode and the tank wall/reference electrode. This current is sensed, amplified and made to operate a relay whose contacts in turn can be used for annunciation/control.