Liectroux S9: Window Cleaning Robot with Up to 9,000 Pa Suction Pressure

The Liectroux S9 is a window cleaning robot with up to 9,000 Pa of suction pressure, two cleaning rollers and six-directional water spraying. It uses gyroscopic navigation to move across glass, supported by sensors and mechanical edge detection.

Suction motor and cleaning system

The robot uses a brushless motor and a suction pump rated at up to 9,000 Pa. The suction helps it stay attached to vertical glass; dirt removal itself relies on water and the cleaning rollers.

Two rollers wipe the surface while the six-directional spray moistens the glass. The water tank holds 110 ml, so it may need refilling when cleaning larger glazed areas.

The device measures 26.5 × 26.5 × 7.5 cm and weighs 2.1 kg. That means handling a device weighing approximately 2 kg when carrying it and placing it on a window.

Navigation and cleaning near edges

The Liectroux S9 combines gyroscopic navigation with optical sensors and mechanical edge detection. These help it navigate the surface and plan its movement across the glass.

Eight microswitches at the corners of the device detect edges and frames. According to the stated specifications, the robot can approach to within approximately 1 mm of the glass edge, helping to reduce the strip left uncleaned. This does not mean that every edge or corner will be completely clean: some may still need finishing by hand.

Cleaning speed and noise

The stated cleaning speed is approximately three minutes per square metre. This can be used to estimate the time needed for larger windows, although the total should also include placing the robot on the glass, refilling the tank if necessary and moving it to the next surface.

The stated noise level does not exceed 65 dB. The robot will be audible during use, which is worth considering in a home or office.

Controls and cleaning modes

The robot can be controlled through the Tuya or Smart Life apps, which allow users to set up cleaning and monitor its progress. A 2.4 GHz remote control is also available, with a stated range of up to 20 metres. It allows operation without using a mobile app.

The Liectroux S9 has four cleaning modes. Water spraying can be controlled manually or automatically to suit the surface being cleaned.

Safety features and backup battery

The robot has multiple fall-protection features and a safety rope with a stated load capacity of up to 100 kg. The rope should be secured correctly according to the manufacturer's instructions. Its load capacity and the other protection features do not guarantee that the device cannot fall, so securing it is especially important when cleaning at height.

The battery has a capacity of 600 mAh, with a stated backup duration of approximately 30 minutes during a power outage. This is a reserve for an interruption to the power supply; the figure alone does not confirm that the robot will continue cleaning or return to a safe position during an outage.

Who should consider its specifications?

The Liectroux S9 is intended for maintaining windows and other glazed surfaces in homes or offices. For larger areas, allow time for possible refills of the 110 ml tank and for moving the robot between windows. Edges may need finishing by hand, and the safety rope must be properly secured when working at height.