ESMFS 304/316 stainless steel Water tank level control dual float level switch sensor
Working Principle
The stainless steel float switch mainly consists of a float, a float rod, a switch assembly, and a housing. The float is usually made of 316L stainless steel, hollow inside, and can float on the liquid surface. The float rod connects the float to the switch assembly. When the liquid level changes, the float drives the float rod to move up and down, causing the switch assembly to close or open, thereby controlling the circuit connection or disconnection.
1. Main body: SUS304/316 stainless steel sealed guide rod (φ8–10mm), built-in 2 reed switches (upper and lower control points).
2. Float: 2 stainless steel floats, built-in annular permanent magnets, can slide freely along the rod.
3. Wiring: 4-wire or 3-wire system, can be set to NO/NC.
4. Operation:
Liquid level rises → lower float → upper float rise sequentially
Magnet approaches reed switch → contacts close / open
Outputs two independent switch signals to achieve dual-point control.
Product Features
1.Strong Corrosion Resistance: Made of stainless steel materials such as SUS304 and SUS316, suitable for various corrosive liquid environments, such as chemical raw materials, acid and alkaline solutions, etc.
2.Good High-Temperature Performance: The all-stainless-steel float switch can withstand temperatures up to 200°C, meeting the requirements for liquid level control in high-temperature liquids.
3.Simple and Reliable Structure: The structure is simple and easy to assemble, resistant to failure, with strong anti-interference capability and stable operation.
4. Multi-Point Control: A single device can be set with 1 to 8 switch points to achieve multi-point liquid level control, with each control point customizable according to customer needs.
Product detail


Technical Specifications
|
TYPES |
Low pressure |
high pressure |
|
Maximum power |
10W |
50W |
|
Maximum switching voltage |
100VDC |
220VDC |
|
Maximum switching current |
0.5A |
1.5A |
|
Minimum collapse voltage |
220VDC |
300VDC |
|
Maximum load current |
1A |
3A |
|
Maximum contact resistance |
100mΩ |
100mΩ |
|
temperature range |
-20~+80 |
-20~+80 |
|
Float material |
SUS304/316 |
SUS304/316 |
|
Card spring material |
SUS304/316 |
SUS304/316 |












