Walk into any high-end watch service center and the most quietly impressive piece of equipment in the room is rarely the timing machine or the waterproof tester — it's the ultrasonic cleaning machine running in the corner. It's the unglamorous but absolutely critical first step: if the parts aren't perfectly clean, nothing else that follows — the reassembly, the waterproof test, the timing calibration — can be trusted.
The Biaojiang PRO is that step done right at the highest level.
Who Is the PRO Actually Built For?
The PRO is not a machine for everyone — and Biaojiang is upfront about that. Their official positioning is precise:
> *Designed for large-scale after-sales service centers, authorized brand service facilities, and experienced watch professionals.*
If you're processing more than 20 watches per day, and the quality of your cleaning directly affects waterproof integrity and timing accuracy downstream, the PRO is essentially the best choice. For an independent watchmaker handling three or four watches a week, it's probably overkill.
⚙️ The 4-Station System: Every Station Has a Specific Job
Station 1 — Stainless Steel Ultrasonic Jar
Filled with professional watch cleaning solution, this jar uses ultrasonic cavitation to:
- Break down hardened old lubricant residue inside movements
- Remove oxidation from metal surfaces
- Clean balance wheels, gear trains, hairsprings, and other precision components
Station 2 — Tempered Glass (Distilled Water Rinse)
After parts leave Station 1, this is the first distilled water rinse stage — washing away chemical cleaning agent residue before it can cause secondary corrosion on metal surfaces.
Station 3 — Tempered Glass (Deep Rinse)
Takes the rinse further, ensuring that even trace amounts of cleaning chemicals are completely eliminated — a critical step for preventing long-term corrosion on steel components.
Station 4 — Tempered Glass (Alcohol Dehydration)
High-purity alcohol performs triple duty:
- Rapidly displaces surface moisture from components
- Accelerates drying by lowering water's surface tension
- The mechanical action of alcohol immersion also helps dislodge the finest residual particles
40kHz + 330W: The Technical Trio Behind Superior Cleaning
The PRO's cleaning performance is defined by three interlocking technical parameters:
Parameter | Value | What It Means |
Ultrasonic Frequency | 40kHz | Dense cavitation bubbles that penetrate micron-level gaps |
Ultrasonic Power | 330W | Sufficient energy to tackle viscous oils and complex geometries |
Cleaning Mode | Multi-frequency switching | Adapts to different materials: steel, precious metals, plastic, gemstones |
This means the PRO handles not just stainless steel cases and bracelets — it can safely clean silicon hairsprings, sapphire crystal movements, and other ultra-precise components that would be at risk in less controlled environments.
Dual-Direction Alternating Rotation: The Increased 80% Efficiency Secret
Conventional ultrasonic cleaners use single-direction vibration — cleaning fluid flows in one direction, leaving blind spots on the reverse side of parts and inside complex bracelet links.
The PRO introduces dual-direction alternating rotation combined with bi-directional wave propagation. Cleaning solution flows three-dimensionally within the tank as the basket rotates. The result:
- Every surface angle of every component is exposed to fresh cleaning solution
- Bracelet links, case chambers, and balance wheel arms get thorough coverage
- Biaojiang's official data confirms an 80% improvement in overall cleaning efficiency
Controlled Temperature Drying: The Safety Line for Precision Parts
Once cleaning is complete, how parts are dried matters as much as how they were cleaned. Excessive heat can damage:
- Plastic components (date jumping wheels, plastic date discs)
- Rubber gaskets (which can permanently deform or harden)
- Dial indices attached with adhesives
The PRO's adjustable temperature drying system lets the operator set the exact temperature appropriate for the materials in the load — ensuring complete moisture evaporation with zero risk of thermal damage.
53kg Heavy-Duty Base: Stability Above All
An ultrasonic cleaning machine vibrating at 40kHz is a serious source of mechanical energy. If the chassis isn't sufficiently rigid:
- Vibration transfers to the workbench, disturbing adjacent precision instruments (like your timing machine)
- Machine movement can cause fluid splashing
- Prolonged vibration loosens internal tubing and electrical connections over time
The PRO's 53kg heavy-duty base solves all three. It stays planted under full operation, protecting both your equipment investment and your work environment.
Built-In Safety: One Button to Stop Everything
The PRO includes an emergency stop button that immediately halts all functions in any abnormal situation:
- Ultrasonic output
- Rotation mechanism
- Heating and drying systems
Combined with a fully enclosed structure and compatibility with 99% of mainstream movement calibers (as per Biaojiang's official specifications), the PRO gives working watchmakers real peace of mind.Two Baskets, Two Philosophies
Two types of baskets for your choice according to your needs:
Basket Type | Characteristics | Best Use Case |
**Standard Metal Basket** | Durable, high load capacity, repeatable sterilization | Daily high-volume part cleaning |
**Polymer Basket** | Lightweight, non-conductive, scratch-proof | Sapphire crystals, gold-plated parts, transparent plastic components |
What the Pros Say
> *"The equipment is all set up and works perfectly. The quality is amazing — I also work at a Rolex service center where we use the Witschi timing machine and Greiner cleaning machine, and in my opinion, Biaojiang PRO is the best alternative."*
> — L. Trapp, Master Watchmaker
Technical Specifications
Specification | Detail |
Model | Biaojiang PRO |
Type | Full-Automatic Ultrasonic Watch Cleaning Machine |
Ultrasonic Power | 330W |
Core Frequency | 40kHz |
Cleaning Jars | 4 (1 stainless steel + 3 tempered glass) |
Rotation Mode | Dual-direction alternating |
Drying System | Adjustable temperature |
Machine Weight | 53kg |
Frame Material | Full aluminum alloy |
Safety Features | Emergency stop, fully enclosed structure |
Accessories Included | Metal mesh basket + polymer mesh basket |
Warranty | 2-Year Limited Warranty |
Price | ~$3,865 USD |
Where to Buy | havomec.com (Free worldwide shipping) |
The Biaojiang Brand
Biaojiang is operated by Panjin Chasing Light Electronic Technology Co., Ltd., a Chinese precision technology company focused entirely on the watch service industry. Their 2024 certifications — National High-Tech Enterprise and Provincial Eaglet Enterprise — reflect genuine capability in innovation, product development, and sustainable operations.
The HAVOMEC platform serves as Biaojiang's official direct retail channel, handling international orders with free worldwide shipping, multiple payment options, and a two-year warranty.
Website: biaojiang.com | Shop: havomec.com
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