In the research, development, and production of industries such as pharmaceuticals, biological products, and fine chemicals, the weighing process is the origin of product quality control. Powdered materials are prone to dispersion and cross-contamination during weighing, posing a threat to operator health. The Class 100 Weighing Booth is specifically designed as a dedicated local purification device to address this. Utilizing directed airflow and enclosed isolation technology, it provides an ultimate solution that is safe, clean, and compliant for weighing operations involving highly potent, highly sensitizing, and high-value materials.
I. Core Functions: Source Control and Two-Way Protection
The core value of the Class 100 Weighing Booth lies in achieving the triple unity of "Material Protection," "Environmental Protection," and "Personnel Protection."
1. Protects the Product, Prevents Cross-Contamination
Working Principle: The FFU (Fan Filter Unit) at the top continuously supplies ISO Class 5 (Class 100) unidirectional clean air downward, creating a vertical air barrier in the operating area.
Customer Value: Ensures that highly active materials being weighed are protected from particulate contamination from the external environment or personnel, safeguarding the purity and quality uniformity of materials from the source of production.
2. Protects Personnel, Controls Dust Exposure
Working Principle: The interior of the weighing booth maintains a negative pressure status (relative to the external environment). If dust escapes, the directed airflow rapidly carries it downward, where it is captured by a dedicated exhaust port or bottom return air channel, filtered through a HEPA filter, and then exhausted, effectively preventing the operator from inhaling toxic or harmful dust.
Customer Value: Provides crucial occupational health protection for operators, fully complying with the strict control requirements for personnel exposure risks per standards like OSHA and EU GMP.
3. Optimizes Process, Improves Weighing Accuracy
Working Principle: The stable unidirectional airflow effectively suppresses dust dispersion; simultaneously, the sturdy work surface and anti-interference design provide a stable working environment free from vibration and airflow disturbances for high-precision balances.
Customer Value: Reduces material loss and ensures absolute accuracy of weighing data, directly enhancing product quality and cost control levels.
II. Materials and Performance: Meticulously Crafted for Demanding Processes
The material selection and design of our Class 100 Weighing Booths are aimed at meeting the requirements for long-term, stable operation under highly corrosive and high-cleanliness conditions.
| Component | Primary Materials & Characteristics | Core Advantages |
| Main Structure | SUS 304/316L Stainless Steel | Excellent corrosion resistance, withstands disinfection with various chemical reagents, dust-free, easy to clean, extremely long service life, fully meets GMP requirements. |
| Work Surface | Solid Stainless Steel Plate (Electropolished optional), Marble Platform (for high-precision balance vibration isolation). | Smooth, wear-resistant, corrosion-resistant. The marble surface effectively isolates vibration, ensuring balance accuracy. |
| Enclosure Panels | Tempered Glass or Compact Laminate (e.g., Trespa), equipped with a large, unobstructed viewing window. | Provides a panoramic view for easy observation of operations. The material is sturdy, offers good sealing, and is easy to clean. |
| Filtration System | Pre-filter + H14 Grade HEPA Filter (Efficiency ≥99.995% on 0.3µm particles). | Ensures the highest cleanliness level of the supplied air; core to ensuring product protection. |
| Fan System | EC Backward-Curved Centrifugal Fan | Energy saving (>50% compared to AC motors), low noise, infinitely variable speed control, supports intelligent control, stable operation. |
| Control System | Microprocessor-based Intelligent Control Panel, displays real-time differential pressure, air velocity, and alarm status. | Intuitive operation, allows setting and locking of operating parameters, ensuring process consistency and traceability. |
Key Performance Characteristics:
Cleanliness: Operating area cleanliness stably maintained at ISO Class 5 (Class 100).
Pressure Control: Can achieve negative differential pressure control relative to the room (typically -5 to -15 Pa), ensuring effective containment.
Noise Level: Optimized design, noise typically ≤65 dB(A), providing a comfortable working environment.
Stable & Uniform Airflow: Average work zone air velocity 0.45±0.1 m/s (adjustable), with good uniformity.
III. Common Specifications and Configurations
The Class 100 Weighing Booth can be deeply customized according to your site, process, and material characteristics.
| Parameter | Common Specifications & Description |
| Standard External Dimensions (W x D x H) | Single-user: 1200x800x2200mm; Double-user: 1800x800x2200mm (Custom sizes supported). |
| Airflow Pattern | Vertical Laminar Flow (Standard) / Horizontal Laminar Flow. |
| Control Method | Constant Air Volume (CAV) / Variable Air Volume (VAV, Recommended). VAV automatically adjusts airflow based on sash position, offering greater energy savings and safety. |
| Lighting System | Sealed LED Light Panel, illuminance ≥500 Lux (adjustable), providing ample light for precise operations. |
| Optional Features | Integrated High-Precision Electronic Balance, Dust Extraction Balance System, Solvent Spray System, Barcode Scanner, Data Print/Output Interface, UV Germicidal Lamp (for surface disinfection). |
The Class 100 Weighing Booth is not just another piece of equipment in your cleanroom; it is a core component for building a high-quality production system. We provide comprehensive services from solution design and equipment customization to validation support.