The Mexameter® MX 18 is available as a stand-alone device or connectable to the MPA systems or as a wireless probe (please see details in Basic Probe Systems).
The measurement is based on absorption/reflection. The probe of the Mexameter® MX 18 emits three specific light wavelengths. A receiver measures the light reflected by the skin. As the quantity of emitted light is defined, the quantity of light absorbed by the skin can be calculated. The melanin is measured by two specific wavelengths (red: 660 nm and near infrared: 880 nm) chosen to correspond to different absorption rates by the pigments. For the erythema measurement two specific wavelengths are used (green: 568 nm and red: 660 nm), corresponding to the spectral absorption peak of haemoglobin and to avoid other colour influences (e. g. bilirubin).
There are many fields of application where changes in the skin colour are of interest. Many international scientific studies demonstrate its benefits in all important dermatological basic research in humans and animals and cosmetic application fields.
Dimensions: 13 cm x 2.4 cm Ø, Measuring surface: Ø 5 mm ≈ 19.6 mm², Cable length: approx. 1.3 m, Weight: 85 g (incl. cable)
Measurement principle: absorption/reflection, Nominal wavelengths: 3 colour measuring system green: λ peak = 568 nm, red: λ peak = 660 nm, near infrared: λ peak = 880 nm, Units: arbitrary Mexameter® units (0-999 for melanin and erythema), Measurement time: 1 s, Measurement uncertainty: ± 5%
For the technical data of the wireless probe, please see Basic Probe Systems.
Technical changes may be made without prior notice.