Compact Bulb Float Switch For Sumps And Tanks
The EMAS SKF1A is a bulb-type level control float switch with a 1.75m PVC cable and a standard counterweight. It tilts as the liquid level rises and falls, switching a pump or alarm circuit directly at up to 6A, 250V AC. Choose it where a compact float is needed in a sump, tank or chamber.
MPN SKF1A
- Bulb float with standard weight - the weight sets the pivot point on the cable
- 6A at 250V AC (AC15) - single-phase pump or alarm switching
- IP68 - designed to be submerged
- 1.75m PVC cable, 3 x 1mm² cores
Downloads: EMAS SKF1A datasheet (PDF)
Technical Details
Frequently Asked Questions
How is the SKF1A different from the SKF float switch?
Both are EMAS single-phase float switches with the same 1.75m cable length. The SKF1A uses a bulb-shaped float, while the EMAS SKF uses a cobra-shaped float, so you can choose the shape that suits your chamber or tank.
Can it switch a pump directly?
It is rated 6A at 250V AC (AC15). Small single-phase pumps within that rating can be switched directly; larger pumps should be switched through a contactor, with the float controlling the coil.
Can I use it for both emptying and filling?
Float switches of this type are usually wired to the appropriate contact for pump-down (emptying) or pump-up (filling). Check the EMAS datasheet wiring diagram for the contact arrangement before installation.
Is a longer cable available?
Yes. EMAS make SKF1A versions with longer cables; ask us for the length you need.
Industry Applications
- Sump and drainage pumps - automatic start/stop on rising and falling water
- Tanks and cisterns - high or low level alarms and pump control
- Building services - sewage, rainwater and plant-room level control