Paper Roughness and Air Permeability Tester ，Bendtsen Roughness & Air Permeability Tester

Whats/App: +86 156 1874 6768

Web: standard-groups.com

TheTMI Paper Roughness and Air Permeability Testeris a versatile laboratory instrument designed to simultaneously measure the surface roughness and air permeability of paper and paperboard. You can rely on it for quality control, production monitoring, and process optimization, ensuring accurate and repeatable measurements essential for your product evaluation and research needs.

Applications

Paper Roughness and Air Permeability Tester (TMI) simultaneously measures the surface roughness and air permeability of paper and paperboard, serving as an indispensable laboratory instrument for quality inspection and process control.

Standards

Surface Roughness:

ISO 8791-2 Paper and paperboard - Determination of roughness/smoothness (airflow method) - Part 2: Bendtsen method

SCAN P21 Industrial standard method for measuring paper surface roughness

NEN 2012 Determination of roughness of paper and paperboard - Bendtsen method

BS 4420 Paper and paperboard - Determination of Bendtsen roughness

DIN 53108 Paper and paperboard tests - Determination of roughness by the Bendtsen method

Air permeability:

ISO 5636-3 Paper and paperboard. Determination of air permeability (medium range). Part 3: Bendtsen Method

NEN 2015 Test for Determining Air Permeability of Paper and Paperboard - Bendtsen Method

DIN 53120-1 Tests for Paper and Paperboard: Determination of Air Permeability: Part 1: Determination of Average Air Permeability by the Bendtsen Method

Features

1. Constant pressure control with dual measurement: Samples are clamped by the indenter and subjected to constant pressure to perform both roughness and air permeability measurements.

2. The indenter incorporates an integrated air pressure sensor that continuously monitors and records pressure fluctuations, ensuring accurate and consistent measurement data.

3. The device features a feedback mechanism enabling operators to make real-time adjustments.

4. User-friendly touchscreen system: Equipped with a 7-inch color touchscreen featuring intuitive icon-based navigation. No language switching required during operation, enabling quick mastery even for novices.

5. Flexible and efficient probe design: The roughness probe covers 10cm² and connects to the main unit via a flexible hose, facilitating rapid multiple measurements across different areas.

6. An optional smoothness probe is available to meet specific smoothness requirements under designated standards.

7. Cost-saving design for easier maintenance: The measurement ring is designed for quick replacement without needing to swap the entire probe assembly, significantly reducing long-term maintenance costs.

Parameters

Item	Specifications
Measurement Units	Roughness: ml/min, l/min; Air permeability: ml/min, l/min, µm/(Pa·s)
Measurement Range	20 – 5.000 ml/min
Pressure Test Range	0.7 – 2.5 kPa
Accuracy	0.5% of reading
Languages	Multiple languages included
Power Supply	110V/60Hz or 220V/50Hz
Compressed Air	600 kPa, clean and dry
Dimensions (L×W×H)	250 × 240 × 250 mm
Weight	25 kg
Output	RS 232 or print output
Optional Accessories	Graph Master software / Air permeability probe

Accessories

Graph Master software for data acquisition and analysis.

Air permeability probe.

Optional Sheffield smoothness test head.

Replacement measurement rings.

Test Procedures

1.Power on the instrument and select the measurement mode (roughness, air permeability, or both).

2.Place the paper or board sample on the sample platform and ensure correct positioning.

3.If automatic sample recognition is enabled, allow the device to detect sample parameters.

4.Press the start button; the pressure head will apply constant pressure.

5.Measurement will be performed automatically, and results displayed on the touch screen.

6.Save or print test data as needed.

7.Repeat measurements for multiple regions or samples to ensure consistency.

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