iPR B³

  • Permanent real-time concentration measurement
  • Stand-alone sensor with integrated electronic
  • Protection class IP 69K
  • Configurable digital switches

Process refractometer iPR B³

The automatically operating process refractometer iPR B³ 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.

The newly developed process refractometer iPR B³ replaces the well known model iPR Basic².The stand-alone sensor with integrated electronic ranks between the compact model iPR C² and the full range model iPR FR². The new sensor comes with a measuring range up to 90% Brix (refractive index 1.52). It is suitable for almost all applications in the field of food production and pharmaceutical industries, but also for many processes in the area of mechanical and automotive engineering and chemistry. The stylish stainless steel housing of the sensor is partially equipped with a blue anodized air cooling jacket. This cooling jacket protects the electronic components from overheating in process temperatures up to 80 ° C. CIP cleaning at the prescribed temperatures is of course possible but the instrument must be switched off.

The special design and electronic equipment makes it highly flexible and easy to use. The iPR B³ is equipped with two switch outputs to run, for example, a connected valve (max. 1A, 24 DC) or relay. With this feature is it also possible to control the cleaning of the measuring prism via a magnet valve.

The iPR B³ measuring head can be installed in pipes, reactors, vessels and mixing tanks, using different weld-in flanges. Our preferred joint system is VariVent. It allows easy installation through a plug-in clamping method. Some processes may require cleaning of the sensor face. SCHMIDT + HAENSCH offers an optional cleaning nozzle or a special designed ultrasonic cleaning device.

In addition to known standard scales such as Brix, Oechsle, ethylene glycol, sodium chloride, urea, etc. SCHMIDT + HAENSCH offers also customized scales.

Main specifications

Measuring range1,32000 – 1,52000 nD
0 – 90 Brix
Resolution0,00001 nD
0,01 Brix
Precision±0,00014 nD
±0,1 Brix (at 20 °C)


Ambient temperature0 °C – 45 °C
Process Temperature (max.)+90 °C
Process Temperature (min.)-10 °C
Process pressure (max.)1 MPa (145 psi, 10 bar)

Additional informationen

Wetted partsSaphire, stainless steel, optional: PTFE
Protection classIP 69 K tested
TÜV Rheinland
Light source/wavelength589 nm LED
Interface, switches2 insulated 4-20 mA analog outputs
2 digital outputs (limited switches, 1 Ampere)
serial outputs, RS 232 or 422 and USB
Prism cleaningOptional: water, steam or ultra sonic cleaning
Power supply24 V DC
Dimensions241 mm x 136 mm (length x diameter)
Weight3790 g