How often do we walk into the restroom of a shopping mall or any public bathroom? Or even worse, endured the nightmare of walking into a bathroom that was used and not flushed? In this modern world, people care more about hygienic and cleanness, especially during pandemic outbreak times. Think about when you go to a public restroom, you need to press the toilet button or turn on the faucet every time. After so many people use it, how dirty and germs will pass to you. Will you worry about it? Here we will offer a solution for you.

What is a sensor toilet flusher system and how does it work?
Touch-less sensor toilet flush system uses active infrared sensor technology which uses the emission and reception of infrared beams to detect the presence and movement of objects or people in their field of detection. These are automated sensor flush valves that don’t require any physical contact to flush after using the toilet. When the sensor detected the body, it is ready to work. When people leave, it flushes water automatically.

Three key parts of hands-free IR sensor toilet flushometer:
Before introducing how the automatic toilets work, we would like to introduce the key parts firstly. Then you will know what it consists of and how it works clearly and easily.


The infrared sensor is like an eye to detect the movement of objects or people. Its job is to inform the valve when to start or stop the flow based on the presence and/or movement of objects or people. There are two infrared LEDs inside the sensor, one LED emits the infrared beams and one LED receives the infrared beams.
Normally the sensor eye is placed on the faceplate. Mostly the plate is made of brass, stainless steel, or tempered glass.


As a key part of the auto flush toilet or flushometer, the valve is like a switch to open and close water flow. When it receives a signal from the sensor, it opens or closes the water flow.
The positive or negative signals from the sensor control the solenoid valve. The polarity of the signal determines if the solenoid will either engage a pull or push action. The valves control the water flow by using a rubber-like disc. When there is no signal, the valve is closed, meaning no water flow through the valve. The presence of body movement will send a positive signal to the solenoid causing it to pull the valve open for water to flow.


Normally there are three types, DC battery, AC power supply, and combined AC/DC type.
DC battery operated, normally 6V(4xAA) or 3V(2XAA) alkaline batteries. Battery replacement is easy, just open the battery box cover and put the new alkaline batteries into the box.
AC adapter, one side with bare wire and one side with waterproof connector connect with the sensor. The input can be 110v-220v and output 3V-6V.
Notice: please take care of the battery polarity.

How does automatic sensor flush work?
The infrared sensor has an infrared transmitter that is used to emit radiation, this radiation reaches the object and is reflected back. Then the reflected radiation is detected by the IR receiver. After the detection, the sensor will give a pulse signal to the solenoid valve to let it open.

The whole program is designed and controlled by a microchip. Normal Mode flush time 9s; Water saving Mode: usage time less than 1min: 4s/flush while using time more than 1min: 9s/flush.