ST-K1 Square Smart Window Cleaning Robot – 3400 Pa Suction, 115 ml Double-Sided Spray & 11 Cleaning Modes

ST-K1 Smart Robotic Window Cleaning Robot – Specifications at a Glance

The ST-K1 is a square-body, fully automatic window cleaning robot built for frameless glass, floor-to-ceiling windows and curtain-wall facades. A 72 W BLDC brushless motor holds the unit against the pane with 3400 Pa of suction while a 115 ml visible water tank feeds a double-sided 2 × 2 nozzle spray. Gyroscope navigation and four collision edge-detection sensors keep the cleaning path even and the corners covered, and 11 intelligent cleaning modes handle everything from one stubborn mark to a full facade pane.

Full-Coverage Cleaning, Corner to Corner

The ST-K1 uses a full-coverage cleaning cloth rather than a small pad, so the contact area stays wide and the wiping pressure stays even across the whole pane. A four-point collision bumper absorbs contact with mullions and frames instead of grinding against them, and the independent air duct separates water from the airflow so the fan keeps pulling clean air instead of mist.

Coverage is what separates a window cleaning robot that works from one that gets retired. With a minimum working area of 60 × 40 cm and an average cleaning speed of about 3 minutes per square metre, the ST-K1 window cleaning robot finishes a standard 1 m² pane in roughly three minutes and moves on to the next section without leaving a dry patch behind. A 2 × 2 air pressure sensor array keeps the suction balance stable as the unit crosses sealant lines and spacer bars.

The Real Cost of Cleaning Windows by Hand

Four problems push buyers toward a window cleaning robot, and they are the same four on almost every project: the danger of working at height, streaks and dust left behind by cloth and squeegee work, windows that cannot be reached from inside or safely from outside, and the labour cost of repeating the job every month.

For a property manager running a multi-floor building, the calculation is straightforward. Outsourced facade cleaning is priced per visit and per floor, so the cost recurs; a robot fleet is bought once and used on a schedule. For a household in a high-rise apartment, the problem is simpler: the outside of the glass is physically out of reach, and the ST-K1 removes the need to lean out of a window at all.

4 Collision Edge-Detection Sensors: Safe on Frameless Glass

Frameless glass gives a window cleaning robot nothing to bump against, so edge detection has to be electronic rather than mechanical. The ST-K1 carries four collision edge-detection sensors that read the glass boundary and stop the unit before it runs off the pane, and the contact blocks are soft enough that they do not scratch or mark window frames on framed installations.

This matters most on balustrades, frameless balcony panels and modern curtain walls, where there is no frame at the perimeter. Intelligent border detection, anti-collision and anti-fall logic work together with an air-pressure sensor, so if the seal is ever compromised the unit reacts before it loses hold.

115 ml Visual Water Tank with a Wide Filling Opening

The tank holds 115 ml and is externally visible, so you can see the water level without opening the machine or guessing how much is left. A wide opening makes refilling quick in the middle of a job, which matters on large glass areas where a small tank would otherwise mean repeated stops.

Wet cleaning is the difference between wiping dust around and actually lifting it. When the pad is fed with water, dust and pollen are captured into the microfiber instead of being dragged across the pane, and the glass dries without the grey film that dry wiping leaves behind.

Two Spray Modes and Intelligent Multi-Path Planning

The ST-K1 supports two water spray modes, so light dust can be handled with a light spray and heavy contamination with continuous wetting. The 2 × 2 nozzle system sprays from both sides with two independent water pumps, which keeps the leading edge of the pad moist in whichever direction the robot is travelling.

Multi-path planning decides how the pane is covered. Instead of a fixed pattern, the ST-K1 plans its route across the glass, continues along the edges and fills the middle, so the number of passes stays low and the coverage stays complete. That combination of spray control and route planning is what produces an even finish on a pane that is taller than it is wide.

3400 Pa Suction for Deeper Cleaning

Suction is what holds a window cleaning robot to the glass, and it is the number that decides how heavy the unit can be, how wet the pad can run and how stable the cleaning stroke stays. The ST-K1 window cleaning robot runs at 3400 Pa, driven by a 72 W BLDC brushless motor rated for long, repeated cycles rather than short bursts.

Higher suction also means the pad can be pressed harder against the glass, which is what actually removes dried water spots and street film. Combined with the 115 ml tank and double-sided spray, the ST-K1 keeps working on wetted glass instead of dragging dry dust across the pane.

Smart Window Cleaning Robot: What the ST-K1 Does for You

Four capabilities do the work: smart navigation for thorough coverage, strong suction for a secure hold, automatic water spray for a streak-free finish, and remote plus app control for easy operation. You place the ST-K1 on the glass, start it, and the cleaning happens while you do something else.

Control is deliberately simple. A 2.4G remote works up to 20 m away and gives real-time voice prompts, so you can see what mode the robot is in from across a room. The companion mobile app covers the same functions from a phone, and the interface language is English.

Dust, Water Stains, Oil and Pollen: Four Stain Types, One Robot

Window dirt is not one problem. The ST-K1 window cleaning robot is built around the four types that actually accumulate on glass: dust that settles on exterior panes, water stains left by rain and sprinklers, oil film that drifts from kitchen exhaust and street traffic, and pollen that sticks to glass in spring and stays there through dry weather.

Each type needs a different combination of water, pressure and contact time, which is why the two spray modes and the multi-path planning matter more than the raw suction figure alone. The practical test is simple: a pane that has not been cleaned for a season should come back clear in a single pass rather than needing a second run.

Compact 240 × 240 × 76 mm Square Body

The body measures 240 × 240 × 76 mm, which is close to a 10.9 inch tablet in footprint. The square shape is deliberate: it reaches into the corners of a pane, where a round chassis tends to leave a crescent of untouched glass, and the 76 mm height lets the unit sit low and pass under narrow frames and around mullions.

At this size the ST-K1 is light enough to lift onto a window with one hand and small enough to store on a shelf or in a service cupboard. For a maintenance team that has to move between rooms or floors, that portability is part of the specification, not an afterthought.

ST-K1 Specifications and What Is in the Box

The ST-K1 window cleaning robot runs on AC 100–240 V input with 24 V / 3 A output, which means the same unit works on 110 V and 220 V markets without a separate version. Rated power is 72 W, the built-in battery is 500 mAh Li-ion, and noise stays at 63 dB during operation. The full attribute list is set out in the product attributes below.

Every unit ships with the accessories needed for a first run:

• Safety rope
• Power adapter
• AC wire
• 2.4G remote control
• Cleaning mop pad
• Water can for filling the tank
• User manual

Heat and humidity aside, nothing else is required. Anyone who has installed a window robot before will be cleaning within a few minutes; anyone who has not will find the sequence in the manual.

OEM and ODM Customization with 12+ Years of Experience

The ST-K1 is offered as a private-mold product with more than 12 years of OEM customization experience behind it. Two options cover most projects: custom logo printing on the unit, and custom colour box packaging built around your own artwork.

Both are usually what a distributor needs to sell the product as their own. Logo printing changes the machine itself; the colour box changes what the customer sees first on a shelf or in an unboxing video. Retailer-specific packaging, manual language versions and accessory combinations are typically handled at the same stage, so it is worth confirming all of them before the order is placed rather than after.

Who Buys the ST-K1 Window Cleaning Robot Wholesale

The ST-K1 is supplied to smart home distributors and retailers, property management companies, hotel and facility maintenance teams, glass and facade engineering contractors, and professional cleaning service providers running scheduled routes.

These buyers tend to have the same requirements: a window cleaning robot that survives repeat use on real glass rather than a one-off demo, consistent suction and spray behaviour across a batch, spare parts and technical support behind the order, and a supplier who can hold the same specification on the second, third and tenth shipment. That is what the ST-K1 is positioned for — not a consumer gadget, but equipment for a recurring cleaning job.

Warranty, Spare Parts and Support

Every ST-K1 window cleaning robot carries a 12-month warranty, and spare parts are available for units in service. Standard wearing items such as cleaning pads are the parts that get replaced most often on a running fleet, and they can be ordered separately so a customer does not have to buy a new robot to keep an old one working.

Before you commit to a bulk order, ask for the current test video, the QC documentation for your batch and the spare parts list for your market — all three are part of a normal wholesale conversation and all three are worth having on file.

Order a Sample or Request a Wholesale Quote

Tell us your target quantity, destination country and packaging requirement for the ST-K1 window cleaning robot and we will come back with pricing, lead time and the customization options that apply to your volume. Sample orders can be arranged so you can test the suction, the spray and the edge detection on your own glass before placing a bulk order.

Browse the full range on our smart window cleaning robot category page, or send us your requirements and we will match the model to the job.

Frequently Asked Questions About the ST-K1

What is the ST-K1 window cleaning robot, and what is it designed for?

The ST-K1 is a fully automatic, square-body window cleaning robot for glass surfaces: frameless floor-to-ceiling windows, balcony panels, curtain-wall glazing and standard framed windows. It holds on to the pane with 3400 Pa of suction from a 72 W BLDC brushless motor, sprays water from a 115 ml visible tank through a double-sided 2 × 2 nozzle system, and cleans in 11 intelligent modes.

How much suction does the ST-K1 have, and what does 3400 Pa mean?

The ST-K1 window cleaning robot runs at 3400 Pa. In a window robot, suction is the force holding the machine against the glass, and it sets two things at once: how heavy the body can be and how firmly the cleaning pad can press on the pane. 3400 Pa is enough to keep a firm, even hold while the 115 ml tank keeps the pad wet, so the unit removes dried water spots and street film rather than only surface dust.

How much water does the ST-K1 hold, and how does the double-sided spray work?

The tank holds 115 ml and is externally visible so the level can be checked at a glance. Two independent water pumps feed a 2 × 2 nozzle system that sprays from both sides of the body, which keeps the leading edge of the pad moist no matter which direction the robot is moving. Two spray modes let you use a light mist for everyday dust or continuous wetting for heavier contamination.

Can the ST-K1 clean frameless or bezel-less glass?

Yes. The ST-K1 uses four collision edge-detection sensors plus gyroscope-based intelligent border detection instead of relying on a frame to stop against, so it works on bezel-less glass, balcony balustrades and curtain walls. The contact blocks are designed not to scratch or mark the frame on framed windows, and air-pressure anti-fall protection backs up the edge detection.

What happens if the power is cut while the ST-K1 is on the glass?

A 500 mAh Li-ion battery provides UPS power-off protection: if mains power is interrupted, the ST-K1 keeps holding the pane for 20 to 30 minutes and sends out an alarm reminder. That window is normally enough to restore power or retrieve the unit safely, which is the protection that matters most on upper floors.

How do I control the ST-K1, and what cleaning modes does it run?

Three control routes are available: the 2.4G remote control, which works up to 20 m away, real-time voice prompts from the unit itself, and the companion mobile app on a phone. The ST-K1 runs 11 intelligent cleaning modes, covering automatic whole-pane cleaning, N-path and Z-path patterns, spot cleaning for individual marks and deeper cleaning for heavy contamination, with one-key start.

How big is the ST-K1, and what is the smallest pane it can clean?

The ST-K1 window cleaning robot measures 240 × 240 × 76 mm, roughly the footprint of a 10.9 inch tablet. The minimum working area is 60 × 40 cm, so it suits most domestic windows, balcony panels and commercial panes; below that size the robot has too little glass to hold and manoeuvre on. Cleaning speed is approximately 3 minutes per square metre, and the square body is what lets it reach into pane corners that a round chassis misses.

What is included in the box, and what warranty do I get?

Each ST-K1 window cleaning robot ships with a safety rope, power adapter, AC wire, 2.4G remote control, cleaning mop pad, water can and user manual, and carries a 12-month warranty. Cleaning pads are the most frequently replaced wearing item and can be ordered separately for units already in service.

Is OEM customization available, and what can be customized?

Yes. The ST-K1 is a private-mold product and OEM customization is supported with over 12 years of experience behind it. Custom logo printing on the machine and custom colour box packaging are the two most common requests; manual language versions, accessory combinations and retailer-specific packaging are normally confirmed at the same stage of the order.