Application Example (1-09)
Dental Clinical Unit

• ・Turn on/off the illumination in a touchless manner by sensing the hand.

• ・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.

(Issues)
General sensors may not be able to detect the hand. In addition, the sensor may unintentionally sense a distant object.
Since the sensor is installed toward the outside of the equipment, it may malfunction due to the incident external disturbing light such as sunlight and illumination.

• ・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.
• ・Because the sensing distance is limited, malfunctions caused by unintended distant objects can be avoided.
• ・By placing a thin transparent cover on the front of the sensor and flattening it, it is possible to design equipment with a drip-proof structure that is easy to clean.
• ・This sensor has a function that makes it less susceptible to disturbance light 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.