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QS310140 Rev A2
IMPORTANT MOUNTING GUIDELINES
1) Never mount the sensor at an angle.
2) Liquid should never enter the dead band.
3) Mount at least 3” from the side wall.
4) Never mount the sensor in a vacuum.
5) Do not obstruct the sensor’s beam width with objects underneath the sensor.
6) Do not mount in the center of a dome top tank.
7) In a cone bottom tank, position the sensor over the deepest part of the tank.
8) Avoid mounting in a riser where the sensor is recessed more than twice the diameter of the riser.
MOUNTING IN A STAND-PIPE
A stand-pipe may be used to dampen turbulence, separate surface foam from the point of measurement or
increase performance in heavy vapor. When mounting the sensor in a stand-pipe, the minimum diameter of the
pipe is 3”, minimum 4” for the UG12 series. Larger diameter pipes can be used. The pipe should be attached
with a coupling or tank adapter and reducer bushing. Avoid the use of multiple pipe fittings when possible. An
ideal mount would be to select a 3” tank adapter (S x T or S x S) and connect the pipe to the inside slip and use
a reducer bushing to attach the sensor (see example below).
The pipe length should run the measurement span and the bottom of the pipe should remain submerged at all
times to prevent foam from entering the pipe. Cut the bottom end of the pipe at 45° and drill a 1/4” pressure
equalization hole within the sensor’s dead band. Locate the stand-pipe away from pump outlets and/or other
sources of substantial turbulence which might cause the liquid in the pipe to oscillate.
3” x 2”
Reducer Bushing
(TxT)
3” Tank
Adapter
(S x T)
3” PVC Pipe
Stand-Pipe Example
Stand-Pipe Mounting
