Tunze Osmolator 3 - Water Level Controller

Maintain rock-solid salinity and precise water levels in freshwater and marine aquariums with the Tunze Osmolator 3 Auto Top Off System. Engineered in Germany, this state-of-the-art automatic top-off (ATO) controller utilizes a large, high-precision optical sensor capable of detecting water level fluctuations as small as 0.5mm while remaining completely impervious to air bubbles, surface scratches, and light mineral deposits.

Designed for maximum safety and ultimate peace of mind, the Osmolator 3 features an independent thermal safety sensor that acts as a fail-safe backup, automatically shutting down the pump in the event of an overfill condition. Powered by the whisper-quiet Turbelle High Jet 5030 dosing pump with 3-phase sine wave technology, this plug-and-play system pumps top-off water up to a delivery height of 6.2 meters, making it ideal for both cabinet sumps and direct aquarium mounting.

Key Features & Benefits

• Ultra-Precise Optical Sensor: Detects water level variations with 0.5mm accuracy while resisting interference from light scratches, microbubbles, and mineral buildup.

• 100% Overflow Protection: Secondary independent thermal safety sensor stops the pump immediately in the event of overfilling.

• Turbelle High Jet 5030 Dosing Pump: Delivers a maximum head height of 6.2m (20.34 ft) with ultra-quiet 3-phase sine wave motor technology, dry-running protection, and blockage prevention.

• Plug & Play Setup: Factory-set parameters eliminate complex software programming or sensor calibration—simply install and power on.

• Premium German Components: Includes German-made hydrolysis-resistant and kink-resistant PU tubing with corrosion-resistant ¼" BSP screw-in push-in fittings.

• Medical-Grade Power Supply: Operates on Safety Extra-Low Voltage (12V SELV) built to rigorous medical technology standards.

• 5-Year Manufacturer Warranty: Backed by Tunze's renowned German engineering and 5-year quality warranty.

Suitable For

• Marine & Reef Aquariums (maintains stable salinity levels essential for sensitive corals and invertebrates)

• Freshwater Aquariums & Planted Aquascapes (prevents unsightly water lines and equipment dry-running)

• Sumps, Cabinet Filter Systems, and Direct Rimless/Rimmed Glass Mounting up to 15mm (0.59") glass thickness

Package Includes

• Large Precision Optical Sensor with Magnetic Holder (up to 15mm / 0.59" glass thickness)

• Independent Thermal Safety Sensor

• Turbelle High Jet 5030 Dosing Pump with Dry-Running Protection

• Medical-Grade 12V DC Power Supply Unit

• Hydrolysis-Resistant German PU Tubing (ø6mm)

• Screw-in Push-in Tube Fitting (¼" BSP to ø6mm) & Magnetic Tube Holder (up to 22mm / 0.87" glass thickness)

Specifications

• Brand: Tunze

• Model: Osmolator 3

• Water Level Detection Accuracy: 0.5mm

• Maximum Delivery Height: 6.2m (20.34 ft)

• Pump Operating Voltage: 12V DC (SELV)

• Sensor Glass Thickness Mounting: Up to 15mm (0.59")

• Tube Holder Glass Thickness Mounting: Up to 22mm (0.87")

• Tubing Specification: German PU, microbe-resistant, non-kinking

• Warranty: 5 Years

• Country of Manufacture: Germany