Osmolator 3155 ATO

The Tunze Osmolator 3155 is the gold standard automatic top-off (ATO) system for marine and reef aquariums. This device constantly and accurately regulates the water level by compensating for evaporation, thereby preventing dangerous salinity fluctuations. The system utilizes a highly precise infrared optical sensor for primary detection, paired with a secondary mechanical float switch for redundant overfill protection.

Key Features

• Optical Sensor: Detects millimeter-level changes in water height, triggering the dosing pump instantly to maintain stable salinity.
• Float Switch Safety: A redundant mechanical float switch that cuts off power and triggers an audible alarm if the water rises too high.
• 12V Metering Pump: Low-voltage, quiet centrifugal pump capable of overcoming significant head height to deliver fresh water from remote reservoirs.