Compact size – the entire optical sensor unit ONLY 0.8 inches diameter. The unit works on rimmed and rimless tanks, and as well as sump tanks. The dual precision optical sensors are 0.1 cm apart, which enables it to monitor the level fluctuation precisely (less than 0.6cm difference)
New and Improved Features – Upgraded ETFT (Extended Time Filling Technology), AFT (Anti-fluctuation Technology), and QST 2.0 (Quick Security Technology). With all these new upgrades combined, our ATOs are far superior and safer. ETFT recognizes your tank size after it first initialized. Working alongside the ETFT, the AFT will be able to decide how long it takes to refill your tank without over-filling it when the QST alarm is triggered.
QST 2.0 provides real-time protection against overfilling and pump dry run. The controller will give a visual alert and stop the pump immediately when it senses a refilling time more than 6 times longer than the time calculated by ETFT. QST can detect a malfunction of the sensor/controller or even an empty reservoir.In version 2.0 we incorporate ETFT feature and not relying on first filling time from version 1. Flooding barely happens when following the instructions carefully.

Compact size. The dual optical sensors system monitors your tank water levels closely for over-fills. When the sensor sees water level at “LOW” position, it starts filling the tank immediately. The “HIGH” sensor provides real-time protection against over-fills. The platinum model uses advanced external optical which can detect the water level through the glass wall on the outside. There are no more loose cables inside the tank.
Smart algorithms. AFT (Anti-fluctuation Technology) and SPT (Single Pumping Time) working together in tandem to ensure the pump works in real-time to add the right amount of water. At the same time, SPT and QST working together to prevent overfill and dry run. Having these features, our pumps will last longer
Built-in LED indicator, smart button and alarm buzzer. equipped with a smart button, you can pause the ATO’s function temporarily when you perform maintenance on your tank. 3 different LED colors to indicate its working status. When errors happen, buzzer sets off alarms to remind you.