Products

Bendtsen

Product line: S624000

For the determination of surface roughness and air permeance according to Bendtsen method. The Bendtsen measurement process is specified both for surface roughness and air permeability. It works according to the air leak method with preset pressure differentials. The ModularLine Bendtsen testing device is available in various different variant models. According to configuration the roughness of the upper surface and / or the lower surface as well as the air permeability can be measured. A device can therefore contain up to three measurement units, each equipped with a closed measurement and regulation system and the latest generation of sensors. Barometric pressure compensation gives you the most accurate results and reproducibility. The results can be displayed in ml/min or μm/Pa*s as required. Calculation according to Gurley is also possible.

Test Description

After inserting the sample and the start of the test sequence, the roughness or air permeance measurement head is automatically placed on the sample and measurement is started. Automated positioning of the head almost rules out inaccuracies of measurement due to outside influence. Depending on the selected measurement pressure a pressure difference of 0.74, 1.47 or 2.20 kPa is created and the throughflow between measurement blade and sample is measured. The air permeability is determined using the same technique, where the airflow through the sample is measured. The same selectable pressure regulation bands apply here.

Applicable Standards

ISO 8791-2 roughness / smoothness / ISO 5636-1/-3 air permeance / DIN 53108 roughness (replaced)
*more standards available

Features

Easy operation via inbuilt touch screen
Automatic and manual measuring process
Pressure difference adjustable
Simultaneous measurement of air permeance and roughness
Compensation of the barometric pressure

Specification

Ease of use due to big touch screen
Separate start and stop buttons
Compensation of barometric air pressure
Measuring range 25-5000 ml/min standard (depending on sensor)
Measurement time: 10s (after pressure is reached)
Difference pressure adjustable: 0.74 kPa, 1.47 kPa, 2.20 kPa
Compatible ProbNet
Can be used as ModularLine Module
Protection class: 2
Protection degree: IP44

Available Models

S624000001 Bendtsen 1 head – porosity
S624000002 Bendtsen 1 head – roughness top side (standard)
S624000003 Bendtsen 1 head – roughness bottom side
S624000004 Bendtsen 2 head– roughness b. side / t. side
S624000005 Bendtsen 2 head– roughness t. side / porosity
S624000006 Bendtsen 2 head– roughness b. side / porosity
S624000007 Bendtsen 3 head– roughness b. & t. side / poro. (Special construction with wider housing)
* more versions and sensors on request

Available Sensors

See data sheet

Available Accessories

S406900001 ProbeNet software incl. 1 licence
* requirements explained upon request

Technical data

Power supply: 100-240V 50/60Hz
Power consumption: <80 W
Compressed air connection: 6 bar / hose 6mm
Water connection: no

Data

Ethernet data output / MQTT
USB Updates / Service
RS232 data output

Measurement

Dwelling pressure: Dead weight of the measuring head roughness 267g
Measuring range: Depending on sensor: 25-5000 standard
Measuring time: From reaching the measuring pressure: 10 s
Selectable measuring pressure: 0,74 / 1,47 / 2,20 kPa
Measuring accuracy: Depending on sensor
Pressure difference: +-0,005kPa linear
Flow rate: +-0,5% of final value
Roughness measuring blade: Ø 31,5mm 150 µm
Porosity measuring area: 10cm² +-0,2cm²
Results:Air permeability P [µm/Ps] / Air permeability V [ml/min] / Roughness [ml/min] / Gurley [s] (Calculated)
Statistics: Mean values / Standard deviation / Coefficient of variation / Min. and max. of test series