Sensor Instruments
Entwicklungs- und Vertriebs GmbH
Schlinding 15
D-94169 Thurmansbang
Telefon +49 8544 9719-0
Telefax +49 8544 9719-13

Color-gloss and structure sensors
COAST Series

The sensors of the COAST Series (COlor And STructure) are hybrid sensors that comprises two sensors that only are synchronised by the LED ring light but otherwise operate independently of each other. Both sensors can be connected to a PLC or to a PC.

One of the two sensors (color sensor) provides information about the color and gloss of the object to be inspected, while the other sensor (structure sensor) checks the structure of the surface.

Using forward and backward scattering of object surfaces in PARA mode:
Some object surfaces are very hard to differentiate if only backward scattering is used. If, however, forward scattering is used in addition, surfaces that have very similar colours but slightly different structures can be differentiated quite well.  Light is directed onto the surface at an angle of -30° and +30° from the normal (vertical).  Only one light source is active at a time, which allows independent evaluation of forward and backward scattering.

For each sensor (color sensor and structure sensor) a specific parameter set is saved both for backward and forward scattering, i.e. altogether four parameter sets are available:

1. Parameter set (IN0 = 0)  ⇒  Color sensor: Forward reflection
2. Parameter set (IN0 = 0)  ⇒  Structure sensor: Backward reflection
3. Parameter set (IN0 = 1)  ⇒  Color sensor: Backward reflection
4. Parameter set (IN0 = 1)  ⇒  Structure sensor: Forward reflection


Participation at trade fairs:

European Coatings Show 2023
28-30 March 2023
Messe Nürnberg (Germany)


New videos:

K 2022, Düsseldorf: Taggant Technology - LUMI-STAR
K 2022, Düsseldorf: Taggant Technology - Intelligent plastic spirit level
L-LAS Spray Control Scope V2.1
SPECTRO1 Spray Control Scope V1.0


Specialist articles in
Kunststoffe International

Luminous Markers instead of Holy Grail
Improved Sorting of Plastic Waste with Luminous Pigments
Kunststoffe international 06/2022
The Color Loop
Ensuring Color Consistency of Recycled Materials

→ Kunststoffe international 05/2022


New applications:

Detection of dents and bumps on metal punching strips
(N° 801)
Differentiation of leather, fabric and synthetic interior components
(N° 802)
Plastic cap color measurement
(N° 803)


... surface tension?
... oil evaporation?
... oil layer thickness


Software news:

SPECTRO3-MSM-DIG-Scope V1.5 (2021.10.20)



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