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JDM-3 Type Electric Relative Density Apparatus for Coarse-Grained Soils (Dual-Use Drop-Hammer Method)

The electric relative density meter is suitable for coarse-grained soils (including sands and gravels) with a particle size of up to 60 mm, as well as fine-grained soils containing no more than 12% particles smaller than 0.075 mm, provided they are capable of free drainage.

Category:

Geotechnical and Soil Testing Equipment

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lbt@lbt.ltd

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+86-15102211717

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JDM-3 Type Electric Relative Density Apparatus for Coarse-Grained Soils (Dual-Use Drop-Hammer Method)

Description

Product Introduction

The electric relative density meter is suitable for coarse-grained soils (including sands and gravels) with a particle size of up to 60 mm, provided they are capable of free drainage. It is also applicable to fine-grained soils containing particles smaller than 0.075 mm, with a fine‑particle content not exceeding 12%. For fine-grained soils, the material must be sand or gravel that can drain freely, with a maximum particle size of 5 mm; moreover, the mass of particles in the 2–5 mm size range should not exceed 15% of the total sample mass. The instrument is used to determine the maximum and minimum dry densities of soil samples.

Reference standard:

Standard for Highway Geotechnical Testing, JTG E40-2007

"Code for Geotechnical Testing of Highway Engineering" JTG 3430-2020

Technical Specifications

Parameter Name	Technical Specifications Details
Metal container	Metal container: 250 mL, inner diameter 5 cm, height 12.7 cm, (with protective sleeve cap and base) Metal container: 1000 mL, inner diameter 10 cm, height 12.75 cm, (includes protective sleeve cap and base)
Hammer	Weight: 1.25 kg ± 5 g; hammer strikes per minute: 42 ± 2
Bottom diameter of the hammer	5cm
Hammer drop height	15cm
Vibratory hammer	Per minute: 190 ± 2 beats (single)
Test timing range	5 min - 20 min
Diameter of the rammer base	≤Test cylinder 1 mm~2 mm
Positioning plate	Outer diameter: 190 mm; Inner diameter: 120–122 mm
Customized long-shaft motor power	120W
Power supply	220V±10V 50Hz

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FAQs

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Customer Reviews

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From Thomas Bennett, Quality Director, UK plastic pipe factory

2026.06.05

★★★★★

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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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JDM-3 Type Electric Relative Density Apparatus for Coarse-Grained Soils (Dual-Use Drop-Hammer Method)

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