user manual

Rev. B, 1/12 LOE Series
5
Automation Products Group, Inc.
APG...Providing tailored solutions for measurement applications
Tel: [phone] • Fax: [phone] • www.apgsensors.com • [e-mail]
Angle
The inclina on of the object’s surface in rela on to the sensor face will aff ect
the strength of the refl ected sound waves. Surfaces perpendicular to the
sensor will refl ect more signal directly back to the sensor. If a surface is more
than a few degrees off perpendicular, enough of the signal will be refl ected
away from the sensor that the target will not be detected. Generally speaking,
a target angle greater than 5 degrees off perpendicular will not be detected.
The target angle becomes increasingly cri cal as the distance to the target
increases.
Environmental Condi ons
Temperature, humidity, vapors, dust, and pressure can aff ect the sensor’s
performance. APG ultrasonic sensors are designed to compensate for many of
these condi ons. However, if the condi ons are extreme, sensor performance
can be degraded enough to require the use of a longer-range sensor than
normal condi ons would require. Ultrasonic sensors may not be suitable for
applica ons with heavy chemical vapors (such as solvents or gasoline), heavy
dust or when signifi cant surface foam is present.
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