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

Looking for the optimal solution for your application?

We develop and produce laser sensors and optoelectronic sensors in the IR, visible, and UV range. We provide complete measuring technology solutions.

Most of our sensors come with an easy-to-use PC software that considerably facilitates evaluation. The sensors are used for the inspection and measurement of physical values such as distance, thickness, position, color, gloss, as well as spray density, contrast, fluorescence, and polarisation.
Our extensive range of products at a glance:

Individual sensor systems  

•  Laboratory measurement systems for measuring the color
   (L*a*b*) of plastic recyclates and plastic flakes
•  Laboratory measurement systems for measuring the
   fluorescence of plastic recyclates and plastic flakes
•  Laboratory measurement systems for measuring the time
   constant of plastic recyclates and plastic flakes (provided
   with markers)
Color control and color measurement  

•  Contrast sensors
   (SPECTRO-1 series)
•  2-channel sensor systems
   (SPECTRO-2 series)
•  Color sensors
   (SPECTRO-3 series)

Counting and triggering  

•  Laser digital light barriers
   (D-LAS series)
•  Laser fork light barriers
   (F-LAS series)
•  Fork light barriers with integrated amplifier
   (FIA series)
•  Frame light barriers
   (FLB series)
•  Laser miniatur light barriers
   (M-LAS series)
•  Laser edge detectors
   (RED series)
•  Trigger light barriers
   (TLB series) 
Surface inspection and counting  

•  Color-gloss and structure sensors
   (COAST series)
•  Gloss and structure sensors
   (GLAST series)
•  Gloss detection sensors
   (GLOSS series, RLS series)
•  Spray jet control systems
   (SI-JET series, SPECTRO-1-JC series)
•  Contrast sensors
   (SPECTRO-1-FIO series)
•  2-channel sensor systems
   (SPECTRO-2-FIO series)
•  Sensors for the mid wavelength infrared light range (MIR)
   (SPECTRO-M series)
Service and engineering

•  Special software
•  Repairs
•  Calibration
•  On-site service
•  OEM products
•  Engineering models
•  Training
Distance measurement and positioning  

•  Triangulation sensors
   (L-LAS-LT series)
•  Reflected light line sensors
   (L-LAS-RL series)
•  Transmitted light line sensors
   (L-LAS-TB series)
•  Line camera sensors
   (L-LAS-CAM series)

Dynamic distance measurement and dynamic positioning 

•  Laser analog light barriers
   (A-LAS series)
•  Modulatable laser analog light barriers
   (A-LAS-N series)
•  Contrast sensors
   (SPECTRO-1-CONLAS series, SPECTRO-1-FIO series)
•  2-channel sensor systems
   (SPECTRO-2-CONLAS series, SPECTRO-2-FIO series)
Product marking and product tracking  

•  Laboratory measurement systems for detailed analysis
   of product markers
   (LUMI-LAB series)
•  Inline detectors for automated checking of
   product markers during the production process
   (LUMI-INLINE series)
•  Compact hand-held units for easy product checking
   on the way
   (LUMI-MOBILE series)
•  Contrast sensors
   (SPECTRO-1 series)
•  2-channel sensor systems
   (SPECTRO-2 series)
•  Color sensors
   (SPECTRO-3 series)
•  Taggant Technology TAGTEC
    inside Masterbach
•  Taggant Technology LUMI-TAG®
    inside lacquer, paste, ink, glue, solvent, pure for glass

Fiber optics and accessories  

•  Fiber optics and optical frontends
   (FIO series)
•  Plastic fiber optics
   (POF series)
•  Various sensor accessories
   (connecting cables, mounting units, reflectors, etc.)



Participation at trade fairs:

PRSE 2023
10+11 May 2023
RAI Amsterdam (Netherlands)

SPS Italia
Smart Production Solutions

23-25 May 2023
Fiere di Parma (Italy)

Plastics Recycling World
Expo 2023

14+15 June 2023
Messe Essen (Germany)


ISO 9001 certification:

Our quality management system
is certified according to the
ISO 9001:2015 standard


New videos:

KOPLAS 2023,
Korea International Plastics and Rubber Show


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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