Courage + Khazaka electronic GmbH

Scientific Devices

Nail StrainStress Meter NM 100

A novel, unique in vivo method to characterize the biomechanical properties of the nail

nm quadratFor the first time objective, highly accurate measurements on the nail are possible.
In collaboration with Prof. Paola Perugini from the University of Pavia in Italy we have developed a patented device to analyze mechanical properties of nails, such as firmness, elasticity and thickness.

 

 




Measurement Principle

Different Applicators and Parameters

Advantages of the Nail StrainStress Meter

Fields of Application

Technical Data

Measurement Principlenm nail close up

nm100 klThe device features a high precision load cell which measures continuously the pressure needed to step down the special applicator. It is equipped with three different applicator sets for the measurement of various parameters. The applicator heads can be moved down in smallest steps. The steps can be adjusted to the individual needs. Even a precision of 1 µm is possible.nm KurveThe force needed for the deflection of the nail is displayed in real time. As soon as the head touches the surface of the nail the pressure increases. The result is a curve of force and distance (force deflection diagram). Its slope is different depending on interesting mechanical properties of the nail. The highly accurate values have a good reproducibility.
The measurement is absolutely pain-free and the system has several mechanisms to provide comfort and safety all the time during the measurement.

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Different Applicators and Parameters

The device is delivered with three different, easy to exchange pressure applicators and nail supports:

Set 1  Set 2  Set 3
nm set 1 außennm set 1 klein nm set 2 außennm set 2 klein nm set 3 außennm set 3 klein
Transversal deformation: the nail is deflected
vertically. The slope of the curve indicates the
elastic property of the complete nail. The result
is the flattening index for the nail.
Resistance to compression force:
the nail is deflected punctually. The
slope of the curve indicates the structural
strength/ firmness of the nail. In addition
the thickness of the nail can be assessed.
Longitudinal deformation: the nail is
deflected horizontally. The slope of the
curve indicates the elasticity of the distal
edge (border) of the nail. The result is the
bending index for the nail..

All data are saved and exported to Excel®.nm results new

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nm close up frontal

Advantages of the Nail StrainStress Meter

  • Unique device to assess nail characteristics.
  • Very easy handling of hardware and the well-organized, convenient software.
  • Several safety and comfort features.
  • Different, easy to exchange applicators give a number of interesting parameters.
  • A variety of settings (pressure force, down step size of the applicator, measurement time, etc.) can be set, in ordnm startscreener to meet your individual application.
  • Ghost image of T0 as an overlay to aid perfect positioning for optimal reproducibility.
  • Quality measures of the curves (R² and deviation) in order to see immediately how good the measurement has been taken.
  • Study based simple and quick evaluation of the results in statistical programs possible.

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Fields of Application

For the first time ever, the mechanical properties of nail can be measured simply and pain-free. This allows to explore a number of new efficacy tests for all kind of nail care products and formulations. The device can help to create innovative product and marketing ideas.
The system has also application potential in the clinical research of nail disorders and diseases as well as other skin diseases presenting nail changes and the quantification of therapies.

 

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Technical Data:

Dimensions: approx. 51 (H) x 20.5 (W) x 19.2 (D) cm, Weight: approx. 10.4 kgPower supply: external 100-240 VAC, 47-63 Hz, DC 12V/9A, Port: USB 2.0, type B connector, Consumption: during measurement approx. 0.3 A, Internal illumination by 18 white LEDs
Measurement principle: Strain-stress measurement of the deflection of the nail by a load/distance diagram
Distance measurement: maximum 10 mm ± 0.02 mm, steps from 1 to 10 µm, measurement uncertainty: 30-70 µm for load of 10 N
Load measurement: high precision load measurement cell, measurement range 0 – 10 N, measurement uncertainty: ± 0.02 N ± 2% of the respective load value
Camera to monitor nail position: built-in 5 MPixel USB color camera, resolution: 2592 x 1994 Pixel
Computer: Windows® 7/8/10, USB 2.0 or 3.0
Technical changes may be made without prior notice.

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