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Anonymous users2024-01-24Infrared sensing. The temperature of the human body is high, and infrared rays are emitted when it heats up. When the sensor senses it, it flows. Then stop when you leave.
This is actually the same principle as the sensor faucet. >>>More
Of course it does. Generally, 4 alkaline batteries are installed inside to power it.
This is done through the principle of infrared reflection When the human hand or a certain part of the body is in the infrared region, the infrared rays emitted by the infrared emitting tube are reflected to the infrared receiving tube due to the blocking of the human hand or body, and are sent to the pulse solenoid valve through the signal processed by the microcomputer in the integrated circuit; >>>More
Electromagnetic induction is also relatively common, of course, the cost performance is better than infrared.
The infrared probe used for sanitary ware is an active infrared probe, and the pyrothermal infrared (passive) probe is used for alarm.