Vertical Liquid Level Float Switch Installation (A How-to Guide)

Float Switch

There is likely going to be a time that you will need to install or replace a vertical float switch in your tank and installation isn’t always as straightforward as it would seem. Innovative Components, a manufacturer of liquid level float sensors, switches, and tank gauges has years of experience designing and manufacturing products and are always looking to offer customers tips and advice on the use and upkeep of their products. This is a general guide and it’s always recommended to check the manufacturer’s specific instructions for product information, instructions, and warnings. However, most vertical float switches are installed in a similar manner and this guide will help you ensure you’re float switch is installed properly.

Removing the Liquid Level Float Switch

While mostly taken for granted, ensuring your float switch in undamaged and all the components are accounted for can save you time and frustration in the future.

  • Carefully unpack the instrument and inspect for any noticeable damage.
  • Make sure that all components have been removed from the packaging and check the contents against the packing list.
  • If anything is damaged or missing, contact the manufacturer immediately.
  • Record the model and serial numbers for future reference when ordering replacement parts.

Prepare the Float Switch and Mounting Area

  • Ensure that the inside diameter and length of the mounting is the correct size for the switch you ordered.
  • Gather all the tools you will need for installation.
  • Make sure the float area is kept clean and free of metallic particles that can be attracted to the float’s magnet.
  • Check if the switch is set up for N.O. (Normally Open) or N.C. (Normally Closed).

Mounting the Float Switch

Vertical liquid level float switches can be mounted at either the top or the bottom of a tank.

  • Make sure the mounting area is free of turbulence or direct streams.
  • Apply thread sealant to mounting threads.
  • Engage threads by hand to avoid damage.
  • Use a wrench to rotate the switch in a clockwise direction until the threads are tight in the mounting.

Wiring the Float Switch

There are two common wiring styles are SPST (single pole, single throw) and SPDT (single pole, double throw).

  • Wire the switch according to the manufacturer’s wiring diagram. Be sure to follow the manufacturer’s specific instructions.

After following the instructions carefully, you should have a fully functioning vertical liquid level switch.