Bendtsen Roughness Porosity Testing Device

Application:

Measures air permeability and surface roughness according to the Bendtsen method.

Standard:

• ISO 8791-1, ISO 8791-2, ISO 5636-1, ISO 5636-3, TARAMA P21, TARAMA P84, IS 9894, DIN53108, BS 4420

Test Description:

Surface Roughness:

The operator places the sample under the measuring head. When the start button is pressed, the measuring head descends onto the sample and gently compresses it. The test begins. As soon as the preset flow rate (e.g. 1.47 ml/min) stabilizes, the measured value is displayed. The test time can be adjusted between 1-40 seconds. After the test is completed, the sample is released. The measuring head returns to its starting position and the device is ready for subsequent measurements.

Air Permeability:

The operator places the sample under the measuring head. When the start button is pressed, the measuring head descends onto the sample and gently compresses it. Air flows through the sample at a selected pressure (e.g. 1.47 KPa). As soon as the preset flow rate stabilizes, the measured value is displayed. The test time can be adjusted between 1-40 seconds. Gurley values are calculated according to standard and are displayed in Gurley seconds by default.

User Interface:

• The machine is controlled via a touchscreen and an auxiliary button.
• Through the visualization and control screen, the complete control and configuration of the machine can be managed.
• Easy and intuitive use of the control menu, which can be configured in different languages.
• Two result tables, with a maximum of 10 result types and 20 test results per table.
• Ability to display a diagram showing different test results.
• Statistical control. Average value, standard deviation, and maximum and minimum values.
• Values shown in statistics in μm/Pa*sn.
• Periodic software updates (at no extra cost).

Features:

Measurement Ranges:

• 25 - 5,000 ml flow rate
• Pressure difference: ±0.5% of final value

Measurement Accuracy:

• Pressure difference: ±0.005kPa linear
• Flow: ±0.5% of final value
• Test time accuracy: ±0.5s

Roughness:

• Measurement area: Ø31.5mm, 150μm, 267g
• Test time: 1-40 seconds (adjustable)

Air Permeability:

• Measurement area: 10 ± 0.2 cm²
• Test time: 1 - 40 seconds (adjustable)
• Display in ml/min or μm/Pa*sn
• Gurley Value: Seconds

Flow Sensors (Optional)

• 15 - 3,000ml / min
• 5 - 1,000ml / min
• 1 - 5,000ml / min
• Other high porosity/roughness upon request

Connection:

• Electricity: 110-230V, 50-60Hz
• Compressed air: 400-600 kPa