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characteristic opening size apparatus

characteristic opening size apparatus

Model: UT4062W; ISO 12956

Geotextile Characteristic Opening Size Test Apparatus (also name Geotextile Effective aperture tester, Pore size testing machine) is used for the determination of effective aperture of geotextile products, and its performance meets the requirements of ISO 12956:2019 Geotextiles and geotextile-related products — Determination of the characteristic opening size. And also the GB/T17634 "Determination of effective aperture of geotextile and related products -- Wet sieve method" standard for the instrument.

Geotextile Characteristic Opening Size Test Apparatus is used for the determination of effective aperture of geotextile products, and its performance meets the requirements of ISO 12956:2019 Geotextiles and geotextile-related products — Determination of the characteristic opening size.

General Introduction

Geotextile Characteristic Opening Size Test Apparatus (also name Geotextile Effective aperture tester, Pore size testing machine) is used for the determination of effective aperture of geotextile products, and its performance meets the requirements of ISO 12956:2019 Geotextiles and geotextile-related products — Determination of the characteristic opening size. And also the GB/T17634 "Determination of effective aperture of geotextile and related products -- Wet sieve method" standard for the instrument.

Main features

  • Test principle
  • Standard

With the untensioned single-layer geotextile and its related product samples as a screen, under the specified vibration frequency and amplitude, the sample and graded granular material are sprayed with water, so that the granular graded material passes through the sample. The effective pore size of the specimen is indicated by the passing particle material and the specific particle size. 

ISO 12956:2019 Geotextiles and geotextile-related products — Determination of the characteristic opening size. 


GB/T17634 "Determination of effective aperture of geotextile and related products -- Wet sieve method" standard for the instrument.

Main Technical Specification

DisplayTouch display, digital setting
Inner diameter of gripper130mm
Number of vibrations3000 times/min
Screening frequency50Hz
Amplitude1.5mm
GridThe mesh size is (10±1)mm
Time0-9999.99s
Water capacity500ml/min 300kpa
Power supplyAC 220V± 10% 50HZ , 300W
Dimension680×420×750mm
Weight45kg


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Beijing United Test Co., Ltd.