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Bettersize - Online Particle Size Analyzer - BT-Online1

BT-Online1 Online Particle Size Analyzer is an on-line particle size monitoring system for real-time particle size monitoring and control in powder manufacturing industries. Driven by Standard Operation Procedure (SOP), it automatically samples, measures, recovers and processes data directly from the powder delivery pipeline, providing 24-hour particle size detection and control for a variety of dry powder production lines.


1. Real-time Control System
As well as being able to continuously monitor particle size, the system also has a function for real-time feedback and control. The system will collect real-time size data and perform calculations against the particle size control limits. It automatically generates the feedback signal to the control center. This closed loop feedback control system will achieve better quality improvement, higher efficiency, reduce wastage and save energy.

2. Automatic Centering Guarantees perfect conditions of the optical system
By moving the laser detector center point to the focus point of the lens before each test, the automatic centering function guarantees perfect conditions of the optical system, therefore providing accurate and repeatable testing results.

3. Accuracy Calibration Maintain accurate datum lifetime
This function maintains operating parameters at consistent conditions, producing consistent and reproducible measurement across the board for all instruments, old and new.

4. Reliable Sampling System
Sample dispersion is achieved by accelerating the powder through a venturi. The "backflush" and tapered pipe design prevents blockage of the sampling tube, and keeps the residual powder clean, ensuring the accuracy and continuity of real-time testing.

5. Versatile Functionality of the System
The system has power interruption protection and over-pressured protection functions. Under these abnormal operating conditions, it will initiate an automatic shutdown
sequence to protect the system from harm. The electrical and mechanical system of the BT-online1 has robust interference protections; it is ready for the haphazard nature of a production environment and an electromagnetic interference prone environment.

6. Contamination Prevention Optics System
Using the controlled principle of aerodynamics, we devised the double air-cushion lens protection system. The contamination prevention technology will form an invisible double air shield between the sample stream and the lens, eliminating the optics from contamination from sampling, as well as a dust-prone environment. With this technology, the ultimate goal of a long duration of sustainable operation, providing real-time, continuous particle size monitoring and control can be realized. Accuracy and continuous monitoring of the production data can be achieved.

Technical specifications

Particle size distribution Dry powder
Theory Laser diffraction
Analysis theory Mie and Fraunhofer
Typical interval measurement time ≥1 min
Measurement range 0.1 - 1000µm
Number of size classes 88 customized grades
Accuracy ≤3% (GBRM D50)
Repeatability ≤3% (GBRM D50)
Effective focal length 223mm
Arrangement Log-spaced array
Quantity 68 pieces
Air flowrate 400-6000L/min
Pressure 0.5-0.8MPa
Air filter 0.3µm, 0.01µm, water, oil
21 CFR Part 11 Enable
SOP Designer Enable
Supply voltage 220VAC
Dimension 800mm x 280mm x 280mm (L x W x H)
Weight 21kg

Key features

  • Measurement: Particle size
  • Particle size range: 0.1 to 1000µm
  • Dispersion type: Dry
  • Technology: Laser diffraction
  • Measuring range: 0.1 - 1000 µm 
  • Repeatability: ≤3% (GBRM D50) 
  • Accuracy: ≤3% (GBRM D50) 
  • SOP: Standard Operation Procedure 
  • Detectors: 68 pieces 
  • Test speed: ≤1 min 
  • High-performance semiconductor laser with long lifespan 
  • Automatic Alignment
  • Automatic Centering

Bettersize has become a significant player in the particle sizing business since 1995. We are a team of ~160 employees dedicated to share our expertise to satisfy your instrument and application requirements with reliable products and first-class services.


As the leading particle size analyzer manufacturer in China in terms of brand reputation, sales volume and most important quality, Bettersize spare no efforts on R&D each year. We offer a variety of products from basic to advanced research equipment, deliver precise analysis of materials from nanometer to millimeter, and assist scientists and engineers to understand material properties, facilitate research, and improve production efficiency.


Focused on technology innovation, product manufacturing, application research, and after sale service, Bettersize is making the particle size analyzer of China enter into the international advanced ranks.