NPT Liquid Level Sensor Float Switch
NPT Liquid Level Sensor Float Switch
NPT Liquid Level Sensor Float Switch

NPT Liquid Level Sensor Float Switch

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Product Description: 

A small mechanical switch (aka. reed switch) sealed in the stationary part of the sensor is activated by a small magnet in the moving part (the float).  This sensor works with any voltage/current (AC or DC) within the maximum limits as specified below.  All voltage/current/power ratings are for resistive loads.  However, one should always try to reduce the voltage and current applied on the sensor to a level as low as possible in order to extend the life of the sensor.  (For example, the Electrical Life is 5,000,000 cycles when the load is 5V, 10mA; 100,000 cycles when the load is 24V, 250mA.)



This can be installed from outside the tank.  Convenient if the inside of the tank is not accessible.  Just drill a hole and make NPT thread or simply use silicone or plumber's tape.

  • Plastic (Polypropylene) Construction
  • 1/2" NPT Thread
  • 240V/0.5A/10Watts Maximum Capacity (A relay is needed to control a heavier load, such as a motor.)
  • Horizontal Mount
  • NO (Normally Open) or NC (Normally Closed) by Rotation
Operation Voltage Range  0 to 240 V (AC or DC)
Max Current 0.5A
Max Power 10W
Max Temperature 180 ºF 
Min Temperature -4 ºF
Max Pressure 150 PSI
Min Specific Gravity 0.90



All of our products have a 30-day risk-free return policy. If you are not satisfied with the product, for any reason, you may return it within 30 days upon delivery for a full refund, no questions asked. We do NOT charge any restocking fee. Items must be returned in unused or as-new condition. The buyer is responsible for return shipping cost.