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Overview

The EVS series of point liquid level switches demonstrate a high degree of reliability due to the use of non-reactive wetted components and a unique reed switch designed specifically for level sensing applications.  The sensor utilizes a moving float with an embedded magnet to activate one of two reed switches located in the sensor body. As the liquid level raises the float, it moves a magnet from the bottom switch to the top switch. The use of two switches provides an indication of three different level conditions. The reliability of this sensor results from a very simple operating principle, a single moving part, media compatible wetted materials, and a unique reed switch design. The sensor mounts into the top wall of a liquid storage tank using an M16 x 2.0 threaded fitting. The M16 mount is available in an internal or external configuration. The outputs are simple N.O. or N.C. SPST reed switches that utilize Ruthenium contact points for reliability. Electrical outputs are three wires with PVC insulation and optional lengths of 0.5 m or 2.0 m.

Benefits

  • Full and/or empty detection
  • Voltage rating up to 175VDC
  • Current rating up to 0.4 amp
  • Compact easy to install design
  • Optional cable lengths
  • Includes mounting hardware

Applications

  • Water and fuel storage tanks
  • Pump on/off controls
  • Marine bilge and ballast tanks
  • Flood detection and prevention
  • Coolant level indication
  • Livestock watering tanks
  • Irrigation systems
  • Water treatment plants
  • Waste water tanks
FAQ

FREQUENTLY ASKED QUESTIONS

Q: Are the liquid level switches avaliable with AC power? 

A:  Liquid level switches can be used with AC power.  However care must be taken to ensure current in the circuit in switch-closed condition is safely below specification in the datasheet.

 

Q: Which is the best mounting orientation?

A:  Horizontal mounting switches may be mounted horizontal with with float moving up or moving down in order to realize a normally closed (NC) or a normally open (NO) condition. Vertical mounting switches when mounted on the top side of a tank, presents an open state, and closes when liquid level raises the float.  In a like fashion, when they are mounted on the bottom of the tank, the switch remains in open state with high fluid level, and closes when fluid level drops, and lowers the float.

 

Q: What are the product mediums I can use to measure level?

A:  The switches can be used in fluid medium that will not attack the exposed plastic surfaces of the switch. 

 

Q: Which is the most suitable liquid level switch for my liquid media?

A:  In order to determine best switch for the application, ensure [1] plastic surfaces of the switch are comaptible for extended use with the media, [2] switch configuration matches available mounting access for the tank, [3] voltage and current rating of the switch matches the electrical load the switch will see in open and closed states

 

Q: What are the liquid level switch options?

A:  Liquid level switch options include:

  1. Mounting configuration -vertical mount / horizontal mount
  2. Switch plastic material
  3. Maximum voltage handling capability
  4. Maximum current handling capability
  5. Max/min application temperature
Features

Please review product documents or contact us for the latest agency approval information.  

Product Type Features

  • Float SG  .68, .74

Body Features

  • Case Material  Glass Filled Nylon 6.6, PVC, Brass and Glass Filled Polypropylene

  • Entry Style  Bottom, Top

  • Seal Material  Nitrile, Silicone

  • Fluid Type  Alkalis, Acids, Alcohol, Water, Fuel, Oil

Contact Features

  • Contact Form  A+B

Dimensions

  • Cable Length  .5 m [ 1.64 ft ]

Other

  • Port Fitting  M16 External, M16 Internal

Reference Number

  • TE Internal Number CAT-LLS0064

Related Materials

CAD Files

Datasheets & Catalog Pages