Jaycar Top-Mount Float Switch – Level Detector, 8mm Fitting (SF0922)

Your tank filling system keeps overfilling and you're tired of babysitting it. This top-mount float switch bolts straight into the lid or cover with an 8mm hole. The float travels just 20mm before it triggers, so you get a clean air gap and no overflow. Contacts close when the float is dry (liquid below) and open when it lifts (liquid above). Rated at 200V 500mA, it slots into your existing fill-control circuit without drama. One small part, one less thing to check every morning

• Top-mount design fits into tank lid or cover via 8mm mounting hole
• Only 20mm float travel needed to trigger — leaves a safe air gap
• Contacts closed when float is out of liquid; open when elevated
• Contact rating: 200V / 500mA
• Ideal for controlling tank filling systems and preventing overfill