Tunze Osmolator 3 (2027 edition)
The Tunze Osmolator 3 2027 edition is the new standard for automatic water level control in marine and freshwater aquariums. Thanks to advanced sensor technology and a well-thought-out, compact design, it offers...
The Tunze Osmolator 3 2027 edition is the new standard for automatic water level control in marine and freshwater aquariums. Thanks to advanced sensor technology and a well-thought-out, compact design, this Osmolator offers unparalleled reliability and ease of use for both beginner and experienced aquarists.
Why a Tunze Osmolator 3?
A stable water level is essential for the well-being of your coral and fish. Fluctuations in salinity can cause stress and affect the health of your aquarium. The Tunze Osmolator 3 automatically ensures a constant replenishment of evaporated water, so that your aquarium always remains in top condition.
- Constant water balance: Keeps salinity and water quality stable.
- Suitable for any aquarium: Works perfectly in both marine and freshwater setups.
- Compact and versatile: Fits in the sump, cabinet, or directly at the edge of the aquarium.
Innovative sensor technology
The Osmolator 3 is equipped with a highly accurate optical sensor that detects water levels with an accuracy of up to 0.5 mm. Thanks to the transparent Tritan™ sensor housing, the sensor is resistant to scratches, deposits, and air bubbles. The additional thermal safety sensor prevents overdosing and offers complete protection against flooding.
- Optical sensor: Detects water levels quickly and accurately.
- Thermal protection: Switches off the pump immediately in case of overdosing.
- LED status indicators: Always visible operation and fault messages, without annoying light pollution.
Powerful and quiet dosing pump
The included Turbelle® High Jet 5030 dosing pump delivers high performance and operates virtually silently, thanks to the modern 3-phase drive. With a maximum head of up to 6.2 meters (in Boost mode), the Osmolator 3 is suitable for almost any setup.
- Standard mode: 160 liters/hour, head up to 3 meters.
- Boost mode: 180 liters/hour, head up to 6.2 meters.
- Dry-running and blockage protection: For maximum service life and safety.
Ease of use and installation
The Tunze Osmolator 3 comes complete, ready for installation. Thanks to the Plug & Play design, all components are pre-configured and ready for immediate use. The magnetic holders ensure a secure attachment for glass thicknesses up to 15 mm (sensor) and 22 mm (hose holder).
- Tool-free assembly: With reusable Velcro strips, no tools required.
- Flexible placement: In the aquarium, the sump, or at the edge.
- High-quality PU hose: Microbe- and hydrolysis-resistant, produced in Germany.
Safety and quality
The Osmolator 3 is equipped with a medical-grade 12V power supply, ensuring maximum electrical safety. Each unit is carefully manufactured and tested in Germany. You benefit from a standard 5-year manufacturer's warranty, with no registration or fine print.
- Medically certified power supply: For reliable operation and extra safety.
- Made in Germany: Production, assembly, and quality control under one roof.
- 5-year warranty: Hassle-free, with exclusive service.
Technical specifications
- Supply voltage: 12 V DC (100–240 V adapter included)
- Power: 0.7 W (sensor), 5–8.5 W (pump)
- Operating temperature: 15–45°C
- Detection accuracy: 0.5 mm
- Suitable for glass thickness sensor: up to 15 mm, hose holder: up to 22 mm
- Minimum filling opening: 58–75 mm (depending on connection)
Supplied complete for immediate use
With the Tunze Osmolator 3 2027 edition, you bring home a complete and reliable system. Everything you need for stable water management is included in the box, except for the reservoir. Invest in peace of mind, security, and the best care for your aquarium.

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Tunze
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Above € 50,- free delivery in NL & BEIn stock Ordered before 16:00, shipped today *
The Tunze Osmolator 3 2027 edition is the new standard for automatic water level control in marine and freshwater aquariums. Thanks to advanced sensor technology and a well-thought-out, compact design, it offers...
Tunze
Ocean Store
Ocean Store is a modern webshop with a large selection of reef aquarium equipment, supplements and food for your (marine) aquarium. We excel in reachability, service and speed. Not only in delivery of your ordered goods, but also in the adequate answering of your (marine) aquarium related questions. We are happy to share our passion for reef aquariums with you!
Open: Available Monday / Friday 9:00-20:00
Phone: +31(0)78-6456669
€ 0.99 - € 2999.99
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