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The Vertical Float Switch – Everything You Need to Know

Vertical liquid level sensors are mounted on the top or bottom of a tank or vessel. Vertical fluid switches have two parts: a stem and a float. The stem is stationary and attaches to the top or bottom of a tank. One or more reed switches are hermetically sealed inside and wires going to the outside of the tank. The float is a doughnut-shaped object placed around the stem that rises and falls with the level of the liquid. When the level of the float aligns with the level of the reed switch inside the stem, it magnetically actuates the reed switch, sending an electrical signal through the wires to the outside of the tank.

These reed float switch are available in either normally open or normally closed configurations (Normal Positions of Fluid Switches).

Vertical Float Switches come in a variety of materials such as:

  • Plastic Vertical Float Switches
  • Stainless Steel Vertical Float Switches
  • and others for broad chemical compatibility with a variety of liquid media.

Each of our vertical float switches is customizable to meet the demands of nearly any industry. Common applications for SMD Fluid Controls’ vertical float switches include: aquariums, HVAC, medical, marine uses, wastewater treatment, chemical processing, breweries and wineries, bioprocessing, and more.

Vertical Float Switches - Stainless Steel

These 316 stainless steel vertical liquid level sensors are corrosion resistant, with high temperature capability and exceptional float buoyancy. Ideal for liquid level tank applications. These durable switches are also suited for hazardous locations and harmful liquid materials. Normally open (NO) and normally closed (NC) configurations are available, with high power and single pole – double throw (SPDT) float switch options. Applications include wastewater, oil and gas industry, machine tool, marine, industrial equipment and manufacturing, agriculture, and food processing. The switches conform to UL- Class 1 Div 1 Grp. A, B, C, D.

Vertical Float Switches - Plastic Liquid Level Sensors

Our plastic liquid level sensors are cost-effective and dependable. These vertical level sensors come in two material options offer diverse application options. Polypropylene fluid switches are best for general use with water or acids, while nylon stems with Buna floats provide superior buoyancy for petroleum fluids and hydraulic oils. Applications include aquariums, HVAC, medical, and marine uses.