In-line Process- Refractometer iPR FR²

Order no.: iPR FR²
£ 9,055.00
£ 10,866.00
price ex. (VAT / delivery)
Refractive index
nD, Brix
Delivery time: min. 4 weeks
Fully automatic digital inline refractometer iPR FR² "Full Range"

The automatically operating process refractometers iPR FR² (Full range) measure the refractive index continuously and thus, the concentration of a binary or quasi-binary liquid mixture. The measurement is independent of light intensity from the light emitting diode (LED) and is free of signal drift, granting high precision and better process control. Colour, turbidity, undissolved particles or gas bubbles do not affect the measurement. You can choice from 2 wide measuring ranges.


The iPR FR² is a stand alone process sensor with integrated, iluminated display, which does not require an external electronic unit. Its special design and electronic configuration makes it highly flexible and very easy to operate. The programming with Windows software is also very easy. Optional a Data Logger is available.


The iPR measuring head can be installed in pipes, reactor vessels, mixing tanks, kettles, boiling pans and evaporators, using different weld-in flanges.

- Permanent inline real time concentration measurement
- Product temperature to 150 °C / 302 °F
- Adjustable digital limit switches
- Customer scales programmable
- Liquid or ultrasonic cleaning
- IP69K protection TÜV tested
- Chemical resistant
- Suitable for food
- CIP and pipe pig capable

Measuring range B1: 1.3320 - 1.5300 / 0 - 100 Brix
Resolution 0.00001 nD 0.01 Brix
Accuracy ± 0.00007 nD ±0.05 Brix (at 20 °C / 68 °F)
Ambient temperature 0 °C to 45 °C/ 32 to 113 °F
Process temperature (max.) + 80 °C / 176 °F without water cooling
+150 °C / 302 °F with built-in water cooling
Process temperature (min.) -10 °C / 14 °F
Process pressure (max.) 1 MPa (145 psi, 10 bar)
Additional Information
Prism YAG
Process contact material YAG, stainless steel optional: PTFE
Protection class IP 69 K tested by TÜV Rheinland
Light source / wavelength 589 nm LED
Interfaces, switches 2 galvanically isolated 4-20 mA outputs
2 switching outputs (limit switch, 1 ampere) serial interface, optionally RS 232, 422 or USB
Explosion-proof version yes, ATEX Class Ex II 1G Ex ia II C T4


1 x iPR FR² Process refractometer, 1 x User manual