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LBT-6000L Glass Stress Tester

Product Introduction: The LBT-6000L Glass Stress Tester is designed to measure the surface stress of chemically and physically tempered glass. By guiding light along the glass surface, it employs photoelasticity principles to determine both the surface stress and the depth of the stress layer. This non‑destructive testing instrument is easy to operate, reducing measurement time while enabling real-time monitoring of the glass manufacturing process. It provides a reliable analysis of the surface stress in chemically tempered glass, allowing for an accurate assessment of the degree of tempering.

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Other Laboratory Testing Equipment

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lbt@lbt.ltd

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Description

Product Introduction:

A stress tester is used to measure the surface stress of chemically and physically tempered glass. By guiding light along the glass surface, it employs photoelasticity techniques to determine both the surface stress and the depth of the stress layer. This instrument offers nondestructive testing, is easy to operate, reduces measurement time, and enables real-time monitoring of the glass manufacturing process. It effectively analyzes the surface stress characteristics of chemically tempered glass, thereby allowing assessment of the degree of tempering.

Product Features:

1. The principle of photoelastic analysis using a refractometer is employed;

2. Automatic measurement reduces human error;

3. Able to store data on a computer, facilitating quality management;

4. Specimens with suboptimal test conditions may be measured manually;

5. Uses an LED light source with a long service life of up to 10,000 hours;

6. A glass calibration plate is used, thereby minimizing machine error.

Technical Specifications:

Project	Parameter
Stress value measurement range	0-1000Mpa
Stress measurement accuracy	±5 MPa
Stress layer depth measurement range	10–100 μm
Stress-layer depth measurement accuracy	±1μm
Light source	Dedicated LED, wavelength 595±10 nm
Measurement object	Chemically strengthened glass, physically strengthened glass
Measure shape	Flat glass, 10 mm × 10 mm or larger
Prism	S-LAL-10 ND=1.72
PC	Dedicated (Windows 7, measurement software already installed)
Power supply	AC 220V ±5V 5A
Size	300×600×200mm
Weight	Approximately 10 kg

Configuration List

1. One stress testing instrument host unit

2. One computer (including the system unit, monitor, mouse, and keyboard)

3. One set of FsmV test software (including one dongle)

4. One calibration slide

5. One triangular prism

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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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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?

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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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LBT-6000L Glass Stress Tester

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