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LBTD 250 Laser Particle Size Analyzer

A laser particle size analyzer utilizes the phenomenon of light scattering by particles and determines the particle size distribution of the sample by analyzing the spatial distribution of scattered light intensity.

Category:

Paint, Coating Film, and Coating Testing Instruments

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E-mail:

lbt@lbt.ltd

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+86-15102211717

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Description

Product Introduction

A laser particle sizer measures the particle size distribution of a sample by exploiting the scattering of light by particles and analyzing the angular distribution of scattered light intensity. By integrating and optimizing optical, mechanical, electronic, and computational systems, this instrument enables rapid and accurate determination of particle size distributions in solid powders or emulsions, and, via its accompanying software, can generate particle size distribution tables, distribution curves, as well as metrics such as average particle diameter, median diameter, and specific surface area. It features intuitive operation, excellent reproducibility, a wide dynamic range, and ease of use.

Performance Features:

◆ Automated testing technology, one-click operation, simple, convenient, and easy to use.

◆ Equipped with a high-performance laser, it delivers stable output, excellent monochromaticity, and high efficiency, significantly enhancing measurement accuracy.

◆ High-performance, stable detectors: up to 80 units (LBTD 250) or 92 units (LBTD 251)

◆ High-performance software that accurately analyzes samples, whether they exhibit a single peak, a double peak, or multiple peaks.

◆ Comprehensive sample preparation system: featuring automatic circulation, ultrasonic dispersion, stirring, automatic water intake, automatic cleaning, and dry‑burn protection, suitable for all types of samples. This ensures thorough dispersion and guarantees the accuracy and reproducibility of test results.

◆ The automatic centering system ensures the instrument remains in optimal condition at all times.

◆ Fast sampling speed; large volumes of data effectively mitigate the impact of a small number of outlier values on repeatability.

◆ Employs random‑function identification and high‑speed front‑end amplification technologies to ensure stable instrument signals.

◆ Prior to shipment, the device undergoes rigorous calibration against standard samples, ensuring accurate and reliable test results.

◆ Unique negative-pressure detection technology to prevent lens contamination

LBTD 251 All‑Purpose Laser Particle Sizer: Additional Features and Functions

◆ The combined use of forward and reverse Fourier‑transform optical path technology with an inclined sample cell not only expands the measurement range but also enhances measurement accuracy and resolution at the fine‑particle end.

◆ An advanced dry‑sample introduction and dispersion system, with sample injection, gas flow control, pressure testing, concentration analysis, and sample collection all centrally managed by a computer, ensuring simple operation and reliable test stability.

◆ Refractive index measurement function.

◆ PQ verification and data diagnostics functions.

◆ Intelligent dual‑water‑level system with multiple safeguards to ensure reliable instrument operation.

Technical Specifications:

Order Information → Main Technical Parameters ↓	LBTD 250 Laser Particle Size Analyzer	LBTD 251 All-in-one laser particle size analyzer
Measurement range	0.1–1000 μm	0.02–2600 μm (wet method) 0.1–2600 μm (dry method)
Repeatability error	≤1% (deviation from the national standard sample D50)	≤0.5% (D50 deviation of the national standard sample)
Accuracy error	≤1% (deviation of D50 for national standard sample)	≤0.5% (deviation from the national standard sample D50)
Fastest test time	≤ 10 s
Resolution	Class A (JJF 1211-2008, bimodal, multimodal)
Testing method	It features automatic measurement, automatic centering, automatic cleaning, and more.
Injection mode	Automatic Wet-Method Circulating Dispersion Injection System	Automatic wet‑method circulating dispersion sampling system & Automatic dry‑method dispersion sampling system
Automatic Wet-Method Circulating Dispersion Injection System	◆ Water: 600 ml, flow rate 3,000–8,000 ml/min; ◆ Solvent: 80 or 200 mL, flow rate 1500–4000 mL/min ◆ Features include automatic water intake, automatic cleaning, automatic drainage, and overflow protection. ◆ Ultrasonic power adjustable up to 50 W, with dry‑boil protection design. ◆ The bottom features an inclined design to prevent particle deposition, and the blade’s central shaft is engineered to inhibit particle accumulation. ◆ Dual Water Level Gauge
Automatic Dry-Dispersion Sample Introduction System	---	◆ Dispersing medium: compressed air or an inert gas ◆ Compressor air pressure: continuously adjustable from 0.1 to 0.8 MPa ◆ Gas flow rate: 400–6,000 L/min ◆ Sample amount: 0.2 g to 10 g
Number of detectors	Front-facing and side-facing, a total of 80.	Front, side, and rear—92 in total.
Lasers and Their Lifespan	High-power fiber laser, with a lifespan exceeding 25,000 hours.	High-power fiber-polarized laser, with a lifetime exceeding 50,000 hours.
Report Format	PDF, BMP, Word, Excel, JPG
Optical path system	Single-lens optical path system	Reverse and forward Fourier transforms, tilted sample cell
Refractive index function	×	√
Operating System and Interface Method	Windows 7/Windows 10 or later; USB 2.0 or 3.0
Power supply	100-240VAC, 50/60Hz, 4A
Host Dimensions and Weight	705mm×318mm×295mm; 22kg	705mm×318mm×295mm; 23kg
Optional Accessories	LBTD 1140 ---- Solvent-based circulating dispersion injection system (suitable for all organic solvent media, made of stainless steel and polytetrafluoroethylene) It consists of a cell made of polyethylene and quartz, with a volume of 80 mL. LBTD 1141—Wet-Method Micro‑Particle Size Test Window Assembly (suitable for wet‑method particle size analysis of valuable samples; the medium may be a solvent or… Water and oil, etc.

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FAQs

Do you supply full-set testing instruments for asphalt and geotechnical engineering projects?

We offer complete lab solutions including asphalt viscosity tester, asphalt rutting tester, geotextile permeability tester, low-temperature flexibility tester and concrete/cement test equipment, covering raw material detection for road, water conservancy and construction engineering projects

Can you customize fixtures or test machines based on our special test requirements? How about after-sales service and warranty?

We provide non-standard customization of test equipment and customized fixture clamps according to customers’ specimen size and test standards. All our testing machines enjoy 12-month factory warranty; overseas customers get remote online debugging guidance, spare parts supply and technical operation training. Our products have been exported to over 70 countries globally

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It measures heat deflection temperature and Vicat softening temperature of plastics, hard rubber, nylon, insulating materials and fiber-reinforced thermosetting composites. Intelligent temperature control guarantees precise heating rate, ideal for plastic raw material incoming inspection and formula development in plastic factories.

Does your pipe pressure burst testing machine control test temperature automatically? What’s its main application?

Yes, the constant-temperature circulating system keeps stable test environment during long-time hydrostatic resistance and instant burst pressure measurement of thermoplastic pipes. It complies with GB6111 standard and serves raw material inspection, new product R&D for plastic pipe manufacturers, third-party testing labs and university laboratories.

What kinds of pipes fit your ring stiffness tester? Can it do long-term creep testing?

This equipment is designed for HDPE, PVC corrugated pipes, plastic drainage pipes and various plastic tubular products. Apart from ring stiffness, ring flexibility and flattening tests, it supports continuous long-term creep tests up to 1000 hours (42 days) as required by industry specifications, widely used for pipe factories and construction quality inspection institutes.

What test items can your WDW series computer-controlled electronic universal testing machine complete? Which international standards can it meet?

Our WDW universal tester is applicable for tension, compression, bending, shearing and peeling tests of metal, plastic, rubber and composite materials. It supports test procedures in accordance with GB, ISO, ASTM, DIN, JIS multiple domestic and global standards. Equipped with high-precision servo drive and dedicated test software, it automatically collects, calculates and exports test data including tensile strength, elongation at break and elastic modulus.

Customer Reviews

European Plastic Pipe Manufacturer｜Purchase: Ring Stiffness & Hydrostatic Burst Tester

From Thomas Bennett, Quality Director, UK plastic pipe factory

2026.06.05

★★★★★

“We have purchased two sets of pipe testing equipment from Laibote (Tianjin) for 18 months. The ring stiffness and hydrostatic burst testing machines run stably for daily batch inspection, test data matches ISO standard requirements precisely, and the intelligent test software is easy for our operators to master. Their after-sales team offers timely remote technical guidance whenever we have operational problems, spare parts supply is efficient. We have arranged a second bulk order for our new production workshop and will recommend Laibote’s testing machines to our industry partners across Europe.”

Middle East Construction Lab｜Purchase: Universal Electronic Testing Machine & Geotextile Test Equipment

From Mohamed Kareem, Lab Manager, UAE third-party construction inspection institute

2026.06.05

★★★★★

“We compared multiple testing equipment brands from Europe and China before cooperating with Laibote. Their WDW universal tester and full-set geotextile testing instruments meet local construction testing standards perfectly. Custom fixtures tailored per our specimen specifications save much testing time. Pre-sale technical communication was patient and professional; engineers provided online operation training after goods arrived. Stable machine performance greatly improves our laboratory’s detection efficiency, we are satisfied with cost performance and overall service.”

Southeast Asia Rubber & Polymer Factory｜Purchase: Vicat Softening Point & Tensile Testing Machine

From Tanaka Hiroshi, R&D Supervisor, Indonesia rubber materials enterprise

2026.06.05

★★★★★

“Laibote’s Vicat softening point tester and electronic tensile machine have been applied to our raw material incoming inspection and new formula development for over one year. High testing accuracy effectively controls our product defect rate. What impresses us most is their responsive after-sale service; technical staff reply our troubleshooting requests within 24 hours even for time zone differences. Compared with expensive European brands, Laibote’s equipment balances quality and price excellently, we plan to expand procurement of auxiliary testing instruments next quarter.”

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LBTD 250 Laser Particle Size Analyzer

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Address:Tianjin Jinghai Economic Development Zone

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