ST-X3 Automatic Window Cleaning Robot – 2400–3200 Pa Adaptive Suction, 85 mL Visible Tank & 3 Cleaning Modes

STX3 Automatic Window Cleaning Robot – Specifications at a Glance

The STX3 is an automatic window cleaning robot that holds on with adaptive 2400–3200 Pa suction, wets the glass from a visible 85 mL tank and runs three cleaning modes from a 2.4G remote control. A brushless BLDC motor keeps it quiet at about 65 dB, a built-in battery keeps the robot adhered to the glass for 20 to 30 minutes after a power failure, and the same machine handles windows, frameless glass, mirrors, marble walls and wooden doors.

One Window Cleaning Robot for Windows, Mirrors, Marble Walls and Wooden Doors

Most cleaners of this kind are only tested on a plain casement pane. The STX3 is set up for the smooth, hard surfaces a building actually has: interior and exterior windows, frameless glass and balcony panels, bathroom and wardrobe mirrors, marble feature walls and painted or varnished wooden doors. Suction decides whether a cleaning robot for windows can hold on to those surfaces at all, which is why the STX3 adjusts its pull automatically instead of running at one fixed level.

The oval body is what makes the difference on narrow surfaces. It is far longer than it is wide, so it turns inside a mirror frame or a slim glass panel where a square chassis would jam against the edge. The minimum using area is 30 × 30 cm — smaller than most bathroom mirrors — and automatic navigation returns the robot to its starting point when the cycle ends. That is also why a window cleaning robot built on this footprint suits tall wardrobe mirrors and long windows in the same session.

2400–3200 Pa Adaptive Suction Keeps the Window Cleaning Robot on the Glass

Suction power self-adjusts between 2400 and 3200 Pa. In a window cleaning robot, that figure decides two things at once: how firmly the machine can press the cloth onto the pane, and how much weight it can carry while working vertically. Adaptive control means the robot holds firmly on smooth glass but never presses hard enough to mark or damage the surface, and the pressure stays even across a large window instead of thinning out in the middle. That controllability is what separates a window cleaning robot you can trust on a full pane from one that simply runs at full power.

A brushless BLDC fan motor drives the suction directly, with no motor brushes to wear down, and twin bottom air ducts keep the airflow stable while the cloth is pressed on wet glass. An independent 2.0 air duct system separates water from air inside the body, which is what protects the internal parts and extends the working life of the machine. On an automatic window cleaner that is expected to run daily, that separation matters more than it does on a machine kept in a cupboard.

85 mL Visible Water Tank and Dual Ultrasonic Mist Spray

The transparent 85 mL tank on this window cleaning robot shows the water level at a glance, so a refill is never a guess. Smart boundary recognition triggers dual water spraying automatically: the STX3 sprays from both the upper and the lower side of the body, which keeps the leading edge of the cloth wet whichever direction the robot is travelling.

Ultrasonic atomization turns the water into a fine, even mist rather than coarse droplets, and two mist levels let you choose lighter wetting for everyday dust or heavier wetting for dried-on marks. Wetting the glass before every pass is what lets the cloth lift dirt instead of pushing dry particles across the surface, so the finish is streak-free and scratch-free without a second wipe. That is the practical difference between an automatic window cleaner that smears the dirt around and a window cleaning robot that finishes the pane in one pass.

2.4G Remote Control with One-Click Start, Auto Navigation and Return

The 2.4G wireless remote sends a stable signal up to 20 metres, so you can start, stop and steer the robot from across the room rather than standing at the glass. One click starts a full cycle. Automatic navigation maps the pane and returns the robot to the point where it started once the cycle finishes — which is exactly where you left the safety cable, so there is nothing to chase afterwards. That matters when the window cleaning robot is working on glass you cannot reach from the floor.

The same control loop runs edge detection. As it approaches the border of the glass the robot reads the edge, turns before the cloth runs off the surface and holds its line along the frame, which is what lets a window cleaning robot work on frameless glass without a rebate to stop against. On a larger window cleaning robot that rebate is usually what halts the body; here the software does the work instead.

Three Cleaning Modes: Fast Z-Type, Deep Double-Z and Spot Cleaning

Intelligent path planning gives you three routes, so one machine covers a quick daily pass and a proper deep clean. Fast cleaning runs a single Z-type sweep across the pane for everyday dust. Deep cleaning runs the double-Z pattern, overlapping each pass for rain film, traffic grime and dried water marks. Spot cleaning concentrates on one stubborn mark when a full cycle would be wasted on the rest of the glass. Three routes on one window cleaning robot means a household does not need a separate machine for each job.

Match the mode to the pane and the dirt level and the same machine handles both a bathroom mirror and a full exterior window. Cleaning speed is about 2.5 minutes per square metre, so a domestic window is a short job and a run of office glazing stays manageable in one session. The same cleaning robot for windows covers a shopfront of glass doors in the same working day.

Multiple Safety Guarantees: Backup Battery, Safety Cable and Edge Detection

Three systems work together on this window cleaning robot. A built-in polymer lithium battery (600 mAh, 14.8 V) provides power-off safety backup, holding the robot adsorbed to the glass for 20 to 30 minutes after a power failure; the safety graphic shows the emergency backup as 25 minutes. A 5 m safety cable clips to the body as the mechanical line. Edge detection with air-pressure sensing recognises the border of the pane and stops the robot before it can lose its hold.

That combination is what makes the machine usable on upper floors and on frameless glass, where there is no frame to catch the body if the suction is interrupted. For an automatic window cleaner working above head height, those three systems are the whole safety case, and they are the reason a window cleaning robot can be left to finish a full cycle unattended.

Compact 1.11 kg Window Cleaning Robot at 30 × 30 cm Minimum Area

At about 1.11 kg and 269 × 136 × 78 mm, the STX3 is light enough to lift onto a window frame with one hand and small enough to store on a shelf or in a service cupboard. For scale, the body is close to twice the length of a 14.76 cm smartphone and only 7.8 cm thick. The minimum using area is 30 × 30 cm, so it fits narrow panes and small mirrors that a larger machine cannot work on. At this weight a cleaning robot for windows can be repositioned single-handed between floors.

Every unit ships with the safety rope, adapter and power cord, remote control, water bottle, two AA batteries, two cotton swabs, six high-density fibre cloths and the user manual, so the machine is ready to run out of the box. A 100–240 V input means one adapter covers different power systems.

Colour, Plug and Customization Options

The STX3 comes in white or black, with EU, UK, US, JP and KR plug types and AC 100–240 V input. Custom logo, colour and packaging are supported for OEM and ODM orders, so the same window cleaning robot can carry a distributor’s own brand. Because the body is compact, one window cleaning robot covers a mixed order of domestic panes and commercial glazing.

Frequently Asked Questions About the STX3

What is the STX3 automatic window cleaning robot, and which surfaces can it clean?

The STX3 is an automatic window cleaning robot for smooth, hard surfaces: interior and exterior windows, frameless glass, balcony panels, mirrors, marble walls and wooden doors. It holds on with adaptive 2400–3200 Pa suction, sprays an ultrasonic mist from an 85 mL visible tank, and runs three cleaning modes from a 2.4G remote control. The minimum using area is 30 × 30 cm.

How does 2400–3200 Pa adaptive suction work?

Suction is the force holding a window cleaning robot against the pane. Instead of running at one fixed level, the STX3 adjusts its pull between 2400 and 3200 Pa, so it holds firmly on smooth glass without pressing hard enough to mark the surface, and the pressure stays even across a large pane rather than dropping off in the middle.

What does the dual ultrasonic mist spray do, and how much water does the tank hold?

The tank holds 85 mL and is transparent, so the level can be checked at a glance. Smart boundary recognition triggers dual spraying from the upper and lower side of the body, and ultrasonic atomization turns the water into a fine mist rather than droplets. Two mist levels cover light dust and heavier dried-on marks.

What are the three cleaning modes, and which one should I use?

Fast cleaning runs a single Z-type sweep for everyday dust; deep cleaning runs the double-Z pattern with overlapping passes for rain film and traffic grime; spot cleaning concentrates on one stubborn mark. Match the mode to the size of the pane and the level of dirt.

How does the 2.4G remote control work, and what is the range?

The 2.4G wireless remote sends a stable signal up to 20 metres, so the robot can be started, stopped and steered from across the room. One click starts a full cycle, and when the cycle ends automatic navigation brings the robot back to the point where it started.

What happens if the power is cut while the robot is on the glass?

A built-in polymer lithium battery (600 mAh, 14.8 V) provides power-off safety backup and keeps the window cleaning robot adsorbed to the glass for 20 to 30 minutes after a power failure; the safety graphic shows 25 minutes of emergency backup. The 5 m safety cable acts as the mechanical line, and edge detection with air-pressure sensing stops the robot at the border of the pane.

How does automatic edge detection keep the robot on the glass?

The robot reads the border of the glass as it approaches, turns before the cloth runs off the surface and holds its line along the frame. Combined with air-pressure sensing, that is what lets the STX3 work on frameless glass and on panes with no rebate to stop against.

How big is the STX3, and what is the smallest surface it can clean?

The body measures 269 × 136 × 78 mm and weighs about 1.11 kg. The minimum using area is 30 × 30 cm, so narrow panes and small mirrors are within range, and cleaning speed is about 2.5 minutes per square metre.

What is included in the box, and is the STX3 quiet enough for hotel rooms?

Each unit ships with the safety rope, adapter and power cord, remote control, water bottle, two AA batteries, two cotton swabs, six high-density fibre cloths and the user manual. The brushless BLDC motor runs at about 65 dB, which keeps cleaning quiet in homes, offices and hotel rooms.