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Geotextile vertical permeability tester
Geotextile water permeability test equipment by Permittivity ASTM D4491

Geotextile vertical permeability tester

Model: UT4026A/UT4026P; ISO 11058, ASTM D4491

Geotextile vertical permeability tester is used to determine the vertical permeability performance of geotextiles and their related products under the constant head method. The head of this type of geotextile vertical permeability meter can be adjusted (0-300mm), and can maintain a stable head, and the geosynthetic material permeation test equipment is designed to reduce the head loss, and the box-shaped structure is adopted.

General Introduction

Geotextile vertical permeability tester is used to determine the vertical permeability performance of geotextiles and their related products under the constant head method. The head of this type of geotextile vertical permeability meter can be adjusted (0-300mm), and can maintain a stable head, and the geosynthetic material permeation test equipment is designed to reduce the head loss, and the box-shaped structure is adopted.



What's Permittivity measuring?  

Permittivity is measured in accordance with ASTM D4491 and is a method most commonly used in the United States. Permittivity is defined as the flow rate (in cubic metres per second), divided by the area of the geotextile tested, divided by the hydraulic head. ASTM D4491 specifies a hydraulic head of 50mm for testing.

Geotextile vertical permeability tester



Main features

  • Features
  • Standard

1. Digital setting of head difference, electric lifting, automatic positioning.


2. Loading samples in water to avoid bubbles during the test and affecting the test results.

ISO 11058:2019 Geotextiles and geotextile-related products - Determination of water permeability characteristics normal to the plane, without load.


ASTM D4491 Standard Test Methods for Water Permeability of Geotextiles by Permittivity

Main Technical Specification

Maximum water head difference300mm
The inner diameter of the gripper50.5mm (20cm²) can be customized with other specifications
Displaydigital display of water head difference, 7.8-inch true color touch screen
Water Head difference control0-300mm digital setting, electric adjustment, automatic positioning
Water Head measurement accuracy0.2mm
The thickness of the testable sample0.1~20mm
Water level height resolution0.01mm
Loading methodLoading in water, special loading tools to quickly complete the loading
Thermometer range0-100°C
Time control0-99999.9   seconds, arbitrary setting
Power supplyAC 220V± 10% 50HZ , 200W
Dimension1280×700×1600mm
Weight120kg


Main accessories

ItemQuantity
Frame1   set
water loading fixture1 set
sampling tools1   set
Measuring cup1 pc
water inlet pipe1   pc
Documents (Manual, packing list, certificate)


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Beijing United Test Co., Ltd.