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Tunze 3155 Osmolator

Sku: 3155.000

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Tunze 3155 Osmolator

Sku: 3155.000


Availability: Order by 3:30pm EST for Same Day Shipping (M-F)

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TUNZE Osmolator Universal
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Water level regulator with two sensors suitable for use in cabinet filter plants, in Comline filters or directly on the edge of the aquarium.
Scope of delivery: Ready for mounting with power supply unit, metering pump, hose, magnet holder for sensors.
Avail. in US voltage only.  Max head pressure: 13 feet.

High-Tech, just for a reliable water level in your tank

In 1985 TUNZE® invented the “auto top off” system. Critics initially derided the idea as an invention for lazy people… They missed the main point: delicate aquatic life requires a constant osmotic pressure. The Osmolator® - short for Osmotic Regulator - provides this in one easy-to-install complete Kit. Only the Osmolator® provides the level of safety and reliability that comes with 25 years of TUNZE® know how.


An optic operated mini sensor recognizes the water level precisely.

The 5017 displays all functions optically and sounds a signal in case of failures.

New Magnetic Sensor mount, so easy to use!

Redundant security: the main sensor is a proprietary optic sensor. Should that fail a safety float switch shuts the unit off and sounds an alarm. Even if that fails safety circuitry shuts off the pump after 10 minutes.


The Osmolator® will be supplied with low voltage pump, mounting magnets, tubing controller and power supply. You only need a reservoir and water!

Additional Information

Additional Information


Tunze 3155 Osmolator Manual

Product Specs


Manufacturer Tunze



I've been using this for over a year. It's reliable and I've really enjoyed not having to replace water manually. Easy and no spilled water.

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