iPR C2

iPR C2
Compact Inline Process Refractometer

The iPR-C2 is an ideal all-round instrument for measuring liquid concentration in a wide range of industrial applications. This compact inline process refractometer performs real time measurements under various conditions for quality control in your production process. Automatic temperature compensation for Brix scale is standard; other scales are programmable.


NEW – Now with extended measuring range!

The iPR Compact² is a compact inline refractometer with extremely short response time for continuous measurement and real-time process control with analog measured value output. It is characterized by its minimal size and weight and has an excellent price-performance ratio.

The iPR Compact² allows inline, real-time refractive index measurement, Brix, or concentration to monitor and control the concentration of substances in solution or liquid mixtures in the process. The compact stainless steel measuring head with YAG prism is equipped with an integrated electronic for connection to a PC or control room.

Available in two versions (aluminum and stainless steel) with different process temperatures ranges.



  • Mixing ratio determination
  • Quality and concentration control of dissolved solids
  • Detection of product transitions
  • Determination of the concentration and degree of contamination of cooling lubricants and cleaning solutions


Measuring range  1.3320 – 1.4209 RI
Resolution 0.0001 RI
Measuring range Brix 0 – 50 Brix (automatic temperature correction 10 °C – 50 °C)
Resolution Brix 0.05 Brix
Refractive index accuracy / Brix +/- 0.0002 RI / +/- 0.15 Brix
Temperature accuracy +/- 0.2 °C
Temperature resolution +/- 0.01 °C
Process temperature – 10 °C  to + 65 °C
Ambient temperature – 10 °C  to + 45 °C
Process contact material YAG; stainless steel, optional: PTFE
Max. pressure 10 bar (1MPa)
Power supply 24 V DC < 75 mQ (20 V – 28 V)
Light source  589 nm LED
Analog data output

4 – 20 mA – active output


Burden [300 Ω]

Digital output

Serial communication over RS232,


RS422 (switchable) and USB

Display As an accessory: can be used next to the iPR or several meters away

Configuration program for :


serial output, analogue output, monitoring of measured values and saving

Process connection Optional: VariVent-Inline (Tuchenhagen) or APV-Inline (APV)
Other options Prism cleaning unit
Dimension 150 mm x 65 mm (length x diameter)
Weight 1000 g