Apg MNU Slave Sensor user manual User Manual download pdf (Page 5)

Rev. B1, 5/13 MNU Series Ultrasonic Sensors

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 • [email protected]om

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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Apg MNU Slave Sensor user manual User Manual Page 5