Application Example (1-08)
Sanitary Equipment A

Application Example (1-08)

Sanitary Equipment A

Touchless switch (sensing of hand)


  • ・Start the equipment automatically not by touching it but by sensing the hand.

Issues & Requests

  • ・Want to change the switch to the touchless type from the viewpoint of sanitation and adopt an easy-to-clean structure.
  • ・Want to ensure detection of the palm by the sensor.
  • ・Want to eliminate the sensor’s malfunction due to external disturbing light.


  • ・Adopted model:
    Light convergent reflective sensor B5W-LB2112-1
  • ・This sensor is optically designed to detect objects such as specular, black, and transparent objects. Therefore, it is effective for detecting the palm.
  • ・By placing a thin transparent cover in close contact with the front of the sensor to make it flat, it is possible to design equipment with a drip-proof structure that is easy to clean. See the recommended conditions for the transparent cover installation.
  • ・This sensor has a function that makes it less susceptible to disturbance via light. However, it may malfunction depending on the type and intensity of the light disturbance, so install a sensor to prevent the light disturbance from entering.

For details, refer to B5W-LB Series: Light Convergent Reflective Sensor User’s Manual.

  • Distance Characteristics for
    Various Reflective Objects
  • Recommended conditions:

*The possibility of detecting the object varies depending on the sensing object or how to install the sensor.
Be sure to conduct sufficient evaluation using the actual devices before staring practical use.

Recommended models: