3C-Photometer – in-line Extinction-Photometer

The 3C-Photometer is a compact three-color extinction photometer for applications in ultrapure and chemical aggressive liquids. The extinction measurement at three wavelengths makes this sensor particular suitable for in-line process monitoring and control of complex and high concentrated multi-phase systems, like submicron dispersions, micro-emulsions or polishing slurries. Besides extinction and color measurement the sensor can be excellently adapted for in-line measurement of concentration and particle size of submicron dispersions.*
*The integrated evaluation unit with a LCD-display, the RS485 interface as well as the free programmable digital or analogue output minimizes additional hardware requirements and guarantees an easy connectivity to a PC or PLC.


  • High dynamic extinction measurement
  • Concentration measurement
  • Quality monitoring of CMP slurries
  • Particle sizing of nanoscaled dispersions
  • Microemulsion in pharma and life science
  • Ultra pure and chemical aggressive liquids
  • Color measurement

Special Features

Measurement parameters Extinction, Extinction ratio, Calibrated concentration
Extinction range 0…8
Wavelength 470, 630, 875 nm
Extinction length 1, 4, 20 mm
max. Pressure 5 bar
Degree of protection IP54
Temperature range -10°C to +40°C
Dimensions 150 x 90 x 180
Process interface Flaretek© 1”, ¾”, FNPT 1”
Power supply 24 V DC (18-36 V), 200 mA
Communication RS485
Analogue Output 4 – 20 mA
Wetted materials PTFE, FPM, Sapphire, PFA
Fully plastic housing, no metallic parts


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