The MAC3 Key float switch is a versatile, IP68-rated submersible float level switch designed for reliable liquid level control in domestic, commercial and industrial applications. Compact and robust, the Key model supports dual operation modes (filling and emptying) and is widely used for sump pump control, tank level monitoring, rainwater harvesting systems and drainage alarms. This listing refers to the Key model supplied with a 10m PVC cable and is commonly referenced under SKU 020-006K.

Key features

• IP68 waterproof rating for continuous submersion and dependable performance.
• Non-toxic polypropylene (PP) housing — durable, chemical resistant and suitable for potable and waste water applications.
• Available cable types: PVC 3×1 and neoprene H07RN‑F; cable lengths include 2, 3, 5, 10, 15 and 20 m (10m included here).
• Microswitch ratings include 16A and 20A options (multi‑voltage versions available) for pump and alarm switching.
• Operating temperature up to +50°C and switching angle ±45° for repeatable level setpoints.

Why choose the MAC3 Key float switch

The Key series is one of MAC3’s most widely adopted float level switches because of its compact form, modular cable options and broad certification availability (including UL/CSA variants for North American use). It is ideal as a submersible level sensor for pump automation, high‑level alarms and dry‑run protection. MAC3 manufactures the Key range in Italy and now offers versions produced in recycled plastic for improved sustainability.

For installation, follow the manufacturer’s manual and wiring diagram; consider adding a counterweight for precise sensing depth or a waterproof cable joint for submerged connections. Compatible with pumps, controllers and level alarm systems, the MAC3 Key float switch is a dependable choice for long‑term level control.