

💧 Stay ahead of the flow with JUNMEIDO’s smart float switch!
The JUNMEIDO 3PCS Float Switch is a high-sensitivity, side-mount liquid level sensor made from durable, corrosion-resistant PP plastic. Operating safely within 0~220V, it features automatic adjustment between normally open and closed states, making it ideal for precise water level control in aquariums, pools, hydroponics, and other liquid management systems. Compact and easy to install with a 40cm wire cable, it ensures reliable, long-term performance for professional and hobbyist use alike.




| ASIN | B0B2HSSMH8 |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 40,792 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 41 in Liquid Level Sensors |
| Control method | Touch |
| Customer Reviews | 3.7 3.7 out of 5 stars (37) |
| Date First Available | 27 May 2022 |
| Item Weight | 80 g |
| Item weight | 0.08 Kilograms |
| Manufacturer | JUNMEIDO |
| Material | Plastic |
| Mounting type | Side Mount |
| Package Dimensions | 17.9 x 14.3 x 2.6 cm; 80 g |
| Sensor technology | Contact Sensor |
| UPC | 749355706457 |
D**M
Automatic discharge of excess water and auto top up keeping the pond water nice and clear
Ideal for controling the water level in my pont
J**S
Float switch
Good float switches, sealing method that they are supplied with is good. Only issue I have is iv used these for a storm water pumping station (just under half a metre deep) so I can't find anything else suitable, milltronics are too bulky for the chamber, industrial floats are too big. Probes are hit or miss. So these worked really well at first. But where it's a overflow/storm water pumping station small debris get inside of the chamber. On two occasions now the floats have failed. The duty float got jammed on a tiny bit of debris, and the stop float just got stuck in the closed postion causing the pump to run dry. Good floats just not really designed for my application.
C**N
It’s an M16 thread if you need to know.
I 3D Printed a holder and put it in my cat’s water fountain. USB and a blinking LED, lets me know when the water is low.
G**S
Didn’t work
Tried several times but didn’t work in the van conversion
J**S
110volt
The description says it can handle 220v supply. But the manual says the limit is 110v. The rating of the cables seems suitable only for low voltage
J**Y
Unreliable
Unreliable; failed to consistently operate. Tapping the sensor reactivated it!
A**T
Long life and reliable.
These little float valves are recommended,long lasting,reasonably priced.
M**K
Works well. 19mm hole (or 16mm if you use your own sealing washer)
The floats bob up-and-down freely in water. The switches are operated by magnets. The magnets are part of the float that is within the fluid, and the electrical contacts are outside the container. If you use the sealing ring that is provided then you will need to create a 19mm diameter hole in the wall of the fluid container. The sealing ring passes through the hole and is then compressed against both sides of the wall. It seems to provide a very good seal. The only problem I foresee is that if the sealing ring perishes and needs to be replaced, I don't know where I'd get a replacement. If you share that concern you could provide your own regular washer or o-ring and in that case you'd only need to create a 16mm diameter hole in the wall of the fluid container. The switches can be used to 'make' the electrical connection when the fluid level rises, or to 'break' the electrical connection when the fluid level rises; according to how you orient them vertically.
A**.
Svolgono la loro funzione, possibilità di invertirli tramite un relè. Mi sono trovato bene
F**O
semplice sensore che apre e chiude un contatto. Ben fatto e con la possibilità di lavorare in logica inversa semplicemente installandolo sotto sopra.
M**O
Troppo deboli
TrustPilot
2 周前
2 周前