Float Level Switches
A float level switch detects a level point when a magnetic float moving with the liquid operates a reed contact or microswitch. With its simple design and contact output it connects directly to pump, valve and alarm circuits.
Vertical and rod types entering from the tank top provide single or multi-point detection; rod types are made up to 6 m long with up to 6 NO or 2 NC contacts. Horizontal magnetic types mounted on the side wall work up to 150 °C and 16 bar.
Main Applications
- Water, fuel and chemical tanks
- Boiler feed and condensate tanks
- Hydraulic and lubricating oil tanks
- Wastewater and drainage pits
- Process tanks needing multi-point control
Technical Data
| Vertical type body-float | AISI 304; optional AISI 316 or PTFE coated |
|---|---|
| Vertical type temperature | −10 °C … +125 °C |
| Vertical type contact | NO / NC reed; max. 400 V, 60 VA / 1 A |
| Rod type | Flanged or BSP/NPT thread, up to 6 m, up to 6 NO or 2 NC contacts |
| Horizontal magnetic type | AISI 316L float, IP66, 150 °C, 16 bar |
| Horizontal type switch | 16 A microswitch, max. 480 V AC/DC |
| Pressure | Up to 16 bar (by model) |
| Min. liquid density | 0.8 g/cm³ (vertical), 0.6 g/cm³ (rod) |
| Protection class | IP68 (vertical), IP66 (horizontal) |
Material Options
| Part | Vertical / rod type | Horizontal magnetic type |
|---|---|---|
| Body / rod | AISI 304 (optional 316 or PTFE) | Cast aluminium housing |
| Float | AISI 304 / 316 | AISI 316L |
| Contact | Reed contact | 16 A microswitch |
| Connection | Threaded or flanged | Stainless or carbon steel flange |
Which material? Reed contact types are for low-power signals; high-current loads such as pumps must be driven through a relay or contactor. If the liquid density is below the float’s minimum, a different float is selected.
Advantages
Multi-Point Detection
- Several points in one rod body
High Pressure
- Up to 16 bar
Hot Media
- 150 °C on horizontal type
Easy Integration
- Contact output wired directly
Construction and Design Features
- Magnetic float
- Reed contacts inside the body or rod
- Cast housing with microswitch on horizontal type
- Threaded or flanged process connection
Write the tank mounting direction, number of points, pressure and temperature; we will define the right vertical, rod or horizontal switch.
How to Choose?
- Define the mountingChoose vertical or rod from the top, horizontal from the side.
- State the number of pointsConsider the rod type for several levels.
- Check the conditionsConfirm pressure, temperature and liquid density.
- Assess the loadDrive high-current loads from reed contacts through a relay.
Complementary Products
Why ORFA?
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