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5.4-meter and 3.6-meter deflection meters

It is suitable for determining the resilient deflection of pavement under static loading or very slow‑rate loading, and it effectively reflects the overall strength of the pavement. Pavement deflection refers to the vertical deformation that occurs at the pavement surface under wheel load; it serves as an indicator of pavement strength. The thicker the pavement structure and the higher the strength of the pavement materials or subgrade, the smaller the deflection; conversely, a thinner structure or lower‑strength materials result in greater deflection. Therefore, in pavement design, construction, maintenance, and reinforcement, it is essential to develop an economically viable and technically sound plan. Measuring pavement deflection is an indispensable procedure and has been widely adopted by highway authorities in recent years.

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Pavement, Subgrade, and Aggregate Testing Equipment

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lbt@lbt.ltd

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+86-15102211717

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5.4-meter and 3.6-meter deflection meters

Description

Product Introduction:

Purpose and Principle: This instrument is suitable for determining the resilient deflection of pavement under static loading or very slow‑rate loading, and it can effectively reflect the overall strength of the pavement.

The pavement deflection value refers to the vertical deformation of the pavement surface under wheel load; it is an indicator of pavement strength. The thicker the pavement structure and the higher the strength of the pavement materials or subgrade, the smaller the deflection value; conversely, the larger the deflection value. Therefore, in pavement design, construction, maintenance, and reinforcement, it is essential to develop a cost-effective and technically sound plan. Measuring pavement deflection is an indispensable method that has been widely adopted by highway authorities in recent years.

The pavement deflection meter is designed based on the principle of leverage and is used to measure the pavement deflection between the dual tires of a vehicle’s rear axle.

Under load, the pavement undergoes localized settlement—i.e., vertical deformation—and the resulting surface response takes on a bowl‑shaped profile centered on the load application point, known as the deflection bowl. Once the load is removed, elastic recovery restores the pavement to its original condition, and the deflection disappears; the difference between the pre‑load and post‑load states is referred to as the deflection value. Experimental evidence shows that the total deflection and the resilient deflection are not identical: even after the load is removed, the deflection bowl does not fully vanish, leaving behind a small residual deformation. Furthermore, the pavement deflection value is closely influenced by factors such as vehicle speed and ambient temperature.

Technical Specifications:

Total length	3600 mm 5400 mm 7200 mm
Leverage ratio	2:1
Length from the fulcrum to the front measurement point	2400 mm 3600 mm 4800 mm
Stiffness	With the center of the shaft hole as the fulcrum, a 200‑g load applied at a distance of 1,200 mm from the fulcrum results in a deflection not exceeding 0.05 mm.

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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

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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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5.4-meter and 3.6-meter deflection meters

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