Water Flow Sensor Switch

1. Optical type water flow switch.
2. Low cost flow switch.
3. Long life, excellent performance flow sensor.
4. No Standby power requirement.
5. Excellent performance.
6. Low flow rate and high flow accuracy.
7. Mainly used for water flow measuring, water cooling system
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Product Details


The advantages of water flow sensor switch FM-4765 are as follows:

imported components of the magnetic switch.

sample working principles.

highly reliable.

cheaper price.

FM4765 is used in the control of water circulation, water charging and discharging, water heating, water pump switch on and off of solenoid valve, or powering on and off of water discharging for electric water heater, solar energy water heater, air condition and other water systems.



Suitable ambient temperature ≥1°C

Suitable working temperature ≤80°C

Minimum starting flow ≥ 0.1 L/min

The maximum flow rate ≤1 L/min

The lowest rated working voltage: DC 4.5 5 V-24 V

Maximum operating current: 15 mA (DC 5 V)

Adaptation Scope And Conditions

(1) The ambient temperature is not lower than 0°C. Do not beat the shell. Keep away from magnetic objects.

(2) The output of the signal is pulse.

(3) The power of the control object must not be greater than the signal load capacity.

(4) This device is a water medium control device and cannot be used for other media control.






1. Could I buy low quantity for test?

Yes, of course, the prices showed on the web, including the shipping cost, but is will take around 20-25 days to your place. if you need fast express, you could contact me, we have contracted price with express company, such as DHL, UPS, FEDEX,TNT.

2. When will make delivery after the order

We usually make delivery within 2 days, if you order large quantity or OEM items, it will take longer time.

3. What is the MOQ?

Usually, our MOQ showed on the website,but some items or OEM item, the MOQ will be confirmation after negotiation

4. Can I get a discount?

Yes, if you order bigger quantity or if you could use your own express account, please tell me to check the final price.

5. Do you inspect the finished products?

Yes, each step of production and finished products will be came out inspection by QC department before shipping.

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