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Sensor mounting angle

In the case of level control or distance control, the stability of the detection signal is affected by the condition of the reflection surface of the detected object.
Mount the sensor so that the ultrasound beam is perpendicular to the reflection surface.

Obstacles around the sensor

Take care that incorrect operation does not occur due to spreading of the ultrasound beam or stray reflection caused by the side lobe.

Through-beam model sensor can be affected by reflection from the floor. In this event, lay a cloth, sponge, or other sound absorbent material on the floor, or install a sound-proof wall.



・ When installing the sensor unit, secure it using the provided mounting nuts or the unit mounting holes. (For details, see the dimensions diagram.)

・ When mounting an ultrasound sensor, do not tap it with a hammer as this will damage water resistance.

・ If the unit is not sufficiently secured, vibration may damage the unit and shifting may prevent correct detection.

Ambient atmosphere

・ To maintain operational reliability and prolong product life, do not use at temperatures in excess of the rated temperature, and do not use outdoors.

・ The ultrasound sensor uses air as the transmission medium. Local temperature differences may cause reflection and refraction at the boundary and air flow may cause the detection area to change, which will result in incorrect operation. Avoid using the sensor in locations with an air curtain blower or other similar machine.


・ Do not use near any kind of air nozzle, as the jet sound produced by the nozzle contains multiple frequency components and will affect ultrasound detection.

・ Water drops on the sensor surface (Emitter and Detector) will decrease the detection distance.

・ Detection is not possible of sound absorbent materials such as cotton and powder. (Reflective models)

Wiring Considerations

Do not wire the sensor cable in same conduit or duct as highvoltage wires or power lines because inductance will be produced that can cause incorrect operation and damage. Wire the sensor cable separately or in an independent conduit.


When using a commercially available switching regulator, ground FG (the frame ground terminal) and G (the ground terminal).