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MN301310 Rev A
Installation
Step Four
GENERAL INFORMATION
1. Switches should be installed rigidly so the floats are free to move as the liquid level changes.
2. Switches should be mounted in a tank area free of severe turbulence or protected from such turbulence
by appropriate and adequate slosh shields or barriers such as bypass chamber or stand pipes..
3. Vertical switch stems should be vertical for best results, but satisfactory operation is possible in most
liquids with the stem
≤
20° angle from vertical.
4. Horizontal mount switch stems must be mounted with the arrow vertically either up or down depending
on switch operation.
5. Care should be taken that switches are always operated within electrical ratings.
6. The switch state (open or closed) for vertical switches can be changed from normally open when dry to
normally closed when dry or vice versa by removing the float and reversing it on the stem (see Step
Five).
7. The switch state (open or closed) for horizontal switches can be changed from normally open when dry
to normally closed when dry or vice versa by rotating the float 180° across its axis (see Step five).
Top Wall Installation (LV20 series only):
FLOWLINE’s LV20
mini-float switch may be installed through the top wall of a tank.
Because the thread of the sensor is very small (1/8”), finding
standard fittings may be difficult. In lieu of standard fittings, one
suggestion is to use a larger pipe, such as ½”. Place a cap or plug
on the end of the pipe and tap a 1/8” thread into the end. Secure
the other end of the pipe to the top of the tank or to a clamp. For
pipes longer than 2’, be sure to extend the cable (splice) so that the
connection is not exposed to the liquid.
Through Wall Installation (LH25 series only):
FLOWLINE’s LH25 mini-float switch may be installed through
the side wall of a tank. The LH25 series has dual male 1/2" NPT threads for installation from the outside of the
tank in or the inside of the tank out. If the LH25-_201 is installed in the Outside-In method, then the outer
threads may be used for connection to conduit.
Inside-Out
Installation
Outside-In
Installation