Overview
This 304 Stainless Steel Float Switch is a durable and reliable solution for automatic water-level control in tanks, wells, pits, and industrial or household water systems. Built to withstand harsh environments, it offers excellent resistance against dirty water, oils, weak acids, and weak alkalis, making it suitable for a wide range of applications—from home water tanks to factory reservoirs and chemical containers.
The switch uses a sealed 304 stainless steel float body paired with high-temperature silicone cable and silver-alloy contact mechanisms, ensuring long service life, high current handling capability, and stable performance even in demanding conditions.
With a simple design and easy installation, this float switch provides a dependable method to monitor and control liquid levels automatically.
Specification
Technical details for 304 Stainless Steel Float Switch For Water Level Detection.
| Specification | Details |
|---|---|
| Model | Stainless Steel High-Temperature Float |
| Rated Current / Voltage | 4A / 220V |
| Operating Temperature | -20°C to 120°C |
| Water Level Control Range | > 0.3m |
| Service Life | ≥ 50,000 operations |
| Maximum Switching Current | 10A at 250V |
| Cable Specification | 1.0mm² high-temperature silicone cable |
| Power Capacity | ≤ 700W (Higher loads require relay) |
| Operating Pressure | ≤ 1 MPa |
| Shell Material | 304 Stainless Steel |
| Float Dimensions | 140mm (length) × 75mm (diameter) |
| Control Box Dimensions | 56mm (diameter) × 60mm (height), Shaft hole: 13.5mm |
| Internal Contact Material | Beryllium-Copper + Silver-Alloy Contacts |
| Cable Features | Heat-resistant, cold-resistant, corrosion-resistant, anti-aging, high conductivity |
Pinout & Functions
Pinout and working of the flot switch to get the desired switching.
| Function | Details |
|---|---|
| Wire Color – Blue | Control wire used for water-filling mode (activates when float is down). |
| Wire Color – Brown | Control wire used for water-draining mode (activates when float is up). |
| Wire Color – Black | Common wire shared by both filling and draining modes. |
| Blue + Black Operation | Float Down (low water level): Circuit closed (ON), pump starts. Float Up (high water level): Circuit open (OFF), pump stops. Used for water-filling systems. |
| Brown + Black Operation | Float Up (high water level): Circuit closed (ON), pump starts. Float Down (low water level): Circuit open (OFF), pump stops. Used for drainage / sump-pump systems. |
| Water Supply System (Filling) | Use Black + Blue wires. ON: Float at low level. OFF: Float at high level. |
| Drainage System (Emptying) | Use Black + Brown wires. ON: Float at high level. OFF: Float at low level. |
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