user manual Owner's manual
MNU Series Ultrasonic Sensors Rev. B1, 5/13
6
Automa! on Products Group, Inc.
APG...Providing tailored solu• ons for measurement applica• ons
Tel: 1/888/525-7300 • Fax: 1/435/753-7490 • www.apgsensors.com • sales@apgsensors.com
NOTE: S! lling pipes are an excellent solu! on for liquid level
applica! ons where an unobstructed path to the target is not feasible
(see s! lling pipe moun! ng on page 9 for details).
• When moun! ng outdoors, it’s best to shade the sensor from direct
sunlight. Direct sunlight can warm the sensor housing above the ambient
temperature causing false temperature readings and overcompensa! on by
the sensor.
• Installa! on
Proper sensor moun! ng is cri! cal for successful opera! on of an ultrasonic
sensor. Using the following guidelines can help ensure trouble free installa! on
and opera! on:
• Ensure that the sensor face is perpendicular to the target surface. If the
target is more than a few degrees off perpendicular, it may not be
detected. Targets at greater distances will require more precise sensor
alignment.
• Mount the sensor in a loca! on that provides an unobstructed column
of air from the sensor to the target. The required width of the air
column depends on several factors, including the angle and refl ec! ve
characteris! cs of any poten! al targets on the edge of the column, the
sensi! vity se$ ng of the sensor, the maximum distance to the target, and
the refl ec! ve characteris! cs of the target itself. Generally speaking a 3 to 4
foot diameter unobstructed column is suffi cient even at longer ranges.
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