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LZJ-4 Fully Automatic Direct Shear Apparatus (Four‑Channel, 7‑inch Color Touchscreen)

It is primarily used to determine the shear strength of soil. Typically, four soil specimens are tested under different confining pressures—400 kPa, 200 kPa, 100 kPa, and 50 kPa (with options for 25 kPa and 12.5 kPa in the case of soft soils)—by applying a horizontal shear force until failure occurs. The shear stress at failure is then measured, and the soil’s shear strength parameters—cohesion and the angle of internal friction—are determined using Coulomb’s law.

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Geotechnical and Soil Testing Equipment

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lbt@lbt.ltd

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+86-15102211717

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LZJ-4 Fully Automatic Direct Shear Apparatus (Four‑Channel, 7‑inch Color Touchscreen)

Description

Product Introduction

The LZJ-4 fully automatic direct shear apparatus is primarily used to determine the shear strength of soils. Typically, four soil specimens are tested under different vertical confining pressures—400 kPa, 200 kPa, 100 kPa, and 50 kPa (with options for 25 kPa and 12.5 kPa in the case of soft soils)—by applying a horizontal shear force until failure occurs. The shear stress at failure is then measured, and the soil’s shear strength parameters—namely, the angle of internal friction and the cohesion—are determined in accordance with Coulomb’s law.

Product Performance:

The LZJ‑4 fully automatic direct shear apparatus features a color 7‑inch touchscreen, a digital microcontroller, and a B‑loop control system. It employs pneumatic loading to regulate vertical pressure and an S‑type sensor to measure shear stress. When connected to a computer, it can automatically perform the entire data acquisition process, record peak values, generate graphs, and produce test result reports. Upon completion of the test, it automatically releases the load and rapidly returns the machine to its home position. With simple operation and highly accurate data collection, the instrument can independently carry out the entire test sequence. The direct shear test—covering preloading, shearing, and unloading—is fully automated, and the system provides real-time, end-to-end monitoring and recording of both test data and procedures, ensuring standardized, procedural testing and reliable results, with automatic generation of test outcomes.

Applicable Standards

1. SL237 “Geotechnical Testing Code”

2. JTG E40 “Code for Geotechnical Testing of Highway Engineering”

3. TB 10102 “Code for Geotechnical Testing of Railway Engineering”

4. GB/T 50123 “Standard for Geotechnical Test Methods”

Technical Specifications:

Parameter Category	Parameter content
Control system	Color 7-inch touch screen + microcontroller + B-ring control system
Pneumatic loading vertical pressure	0–800 kPa, accuracy: 1% F·S (for special tests, optional pressure ranges: 0–600 kPa, 0–800 kPa)
Shear stress	0–2000 N, accuracy: 1% F·S (for soft soil testing, optional pressure ranges of 0–400 N and 0–600 N are available)
Specimen specifications	Specimen area 30 ² cm, soil sample dimensions: φ61.8×20mm
Number of cut boxes	4 pieces
Shear rate	0.010–2.400 mm/min
Test method	Quick shear, consolidated quick shear, and consolidated slow shear; optional module available for cyclic shear (repeated shear, residual shear).

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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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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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LZJ-4 Fully Automatic Direct Shear Apparatus (Four‑Channel, 7‑inch Color Touchscreen)

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