Photoelectric sensor Precautions During Use

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Influence of the detection target size

• The detection distance varies depending on the target size.

Influence of the detection target material

• With reflection type, the detection distance varies depending on the detection target material.

Reciprocal interference

• When several photoelectric sensors are used close of each other, leave enough space between them or install light interception plates to prevent light interference.
  Pay also attention to light that may reflect on the floor or the walls.

When used nearby (transmission type)

• With transmission type, when multiple phototransmitters and photoreceivers are aligned and used at the same time, do not align them perfectly but place every other part a bit forward to prevent interference (with up to two sensors). However, when the detection target is very close to the photoelectric sensor, it may happen that the light reflected on the target enters into the neighboring photoreceiver.

External light

• Strong light, such as sunlight, spotlight, and infrared remote controller signals, entering the light reception area may cause incorrect detection. In such cases, change the installation location or installation angle to prevent strong light from entering the reception area.

Influence of the background (reflection type)

• With reflection type, the detection target background may cause unstable operation.
• If the background is a wide space with no object or is made of black color with low reflectivity, it will not affect the sensor operation.

About the detection surface

• The sensor may not operate properly if the detection surface of the phototransmitter or photoreceiver is dirty or damaged.
• Wipe gently these surfaces with a soft and dry cloth if they are dirty. Do not use organic solvents such as thinner.

About the operating environment

• Avoid using or storing the sensors in locations subject to direct sunlight, with sudden temperature change, where they may be subject to vibrations and impacts, or where water, oil, chemicals, dust, or corrosive gases may contact the sensors.