Smart Temp Security – emergency cut-out switch for the heater and cooler
Plug-in thermal cut-off for aquarium heaters and chillers. A magnetically mounted water sensor cuts power…
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This controller is for aquarium keepers who want a backup against water temperature drifting out of range when a thermostat fails. It sits between the mains and a heater, a chiller, or both, and disconnects them when water leaves the set limits, so a faulty thermostat does not run unchecked.
Why it matters
- Two temperature limits: power to a heater is cut above 28.8°C, and power to a chiller is cut below 22.2°C.
- Automatic restart: when the water returns to the permitted range, the heater or chiller starts working again without manual intervention.
- Visual and audible alarm: the socket flashes red and an acoustic alarm sounds when a limit is exceeded.
- Magnetic sensor mounting: the miniature temperature sensor has two magnets, one inside and one outside the glass, so it attaches to the tank wall without suction cups or brackets. Glass up to 12 mm is supported.
Specifications
- Model: AutoAqua Smart Temp Security, symbol XXX AA STS-120EU
- EAN: 4714041212228
- Heater cut-off threshold: above 28.8°C
- Chiller cut-off threshold: below 22.2°C
- Temperature error range: 0.5°C
- Maximum socket load: 1100 W
- Maximum aquarium glass thickness: 12 mm
- Outer magnet: 20 mm diameter × 8 mm height
- Inner viewer: 20 mm diameter × 20 mm height
- Socket dimensions: 65 × 65 × 35 mm (excluding the plug that enters the wall outlet or power strip)
- Cable length: 3 m
- Socket standard: EU/PL 230 V with earthing
- Weight: 0.12 kg
What it works with
The unit is designed for freshwater and marine aquariums that use a heater, a chiller, or both on one socket, provided the combined load stays within 1100 W. Its 12 mm maximum glass thickness and 3 m cable determine where the sensor can be mounted and where the controller can be placed relative to the outlet. It is supplied ready to use, so it requires only connecting the sensor and the appliances.
Technical specification
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Frequently asked questions
The sensor goes inside the aquarium and is held in place with the magnet from the set, so it works with glass up to 12 mm thick. The unit is plug-and-play, so no extra setup is needed before use.
It switches off a heater when the water goes above 28.8°C and a chiller when the water drops below 22.2°C. The stated temperature error is 0.5°C.
The socket's light flashes red and an audible alarm sounds, matching the type of alarm. The device returns the heater or chiller to operation once the temperature is back within the safe range.
Yes, the socket can power a heater, a chiller, or both at the same time. The maximum total load on the socket is 1100 W.
The socket is the standard EU/PL 230V type with earthing, and the cable is 3 m long. The unit's body measures 65 x 65 x 35 mm and weighs 0.12 kg.
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