Kelco Q Series Heavy Duty Float Switch 

The Kelco Q Series Heavy Duty Float Switch is a robust, chemical-resistant liquid level controller designed for demanding industrial, agricultural, and wastewater applications. Featuring a double-moulded polypropylene float sealed onto a high-quality CPE rubber 3-core cable, the Q Series is built for durability in harsh environments, including water, effluent, and chemical solutions.

Inside the float is an SPDT 3-wire silver alloy switch rated up to 21A at 250V AC, providing precise ON/OFF control for pumps, valves, and alarms. By adjusting the tether length, the switch can be set for either filling or emptying operations. The seamless, tamper-proof design contains no mercury, lead, or corrodible metal parts, ensuring safety and long service life.

The Q Series is available in a wide range of cable lengths (4m to 50m) and can be supplied with an optional heavy-duty polypropylene cable weight for vertical stability.

FEATURES

• Australian-made, heavy-duty chemical-resistant float switch
• Double-moulded polypropylene float with no seams or glands
• SPDT 3-wire switch – up to 21A at 250V AC
• High-quality CPE rubber cable, 600V rated
• Fully sealed, tamper-proof construction
• Withstands oil, grease, fat, sewerage, and many chemicals
• Compatible with potable water, seawater, and sodium hypochlorite
• Optional heavy-duty cable weight (QCW) with 316 stainless fittings
• Available in cable lengths from 4m to 50m
  

APPLICATIONS

• High/low-level control in tanks, pits, and dams
• Loss-of-prime pump protection
• Automatic sump pump control
• Filling and draining valve control
• Effluent and separation pit monitoring
• Bulk liquid tank level management
• Level alarm activation
  

SPECIFICATIONS

• Max submergence: 30m (300 kPa static)
• Liquid temp: -20°C to 60°C
• Min liquid SG: >0.82
• pH range: 1–14
• Switch rating: 21A at 250V AC, 4A motor load, 0.05A min load
• Cable: 3-core CPE rubber, 9mm OD, 600V rated
• Min tank/well diameter: 600mm