Inline process refractometer


PDF data sheet
  • Refractometric sensor
  • Ultra compact design
  • Stainless steel
  • Modbus and RS-232
  • Self-monitoring system
High measuring precision in a compact design

The SensoRef sensor from Schmidt + Haensch opens up a new field of miniaturization for process refractometers.

Thanks to the new optical design, the actual sensor has the size of a golf ball. It design requires fewer parts, resulting in a highly efficient and compact construction. As a true sensor, it can be used in applications which can not be met by conventional refractometers.

If you are dealing with minimal volumes, space-limited installations or mobile operation, Schmidt + Haensch has another ultimate solution for you here.

Designed to be easily integrated into your process controls, it can be connected directly to your PLC via Modbus or RS-232 interface. Integrated functions such as temperature measurement, cleanliness control and filling level detection ensure a self-monitoring system.


Main specifications

Measuring scales Refractive Index (RI), Brix (Bx)
Measuring range 1.333 RI – 1.387 RI / 0 - 32 Bx
Resolution 0.0001 RI / 0.1 Bx
Precision ± 0.0007 RI / ±0.5 Bx
Wavelength 589 nm


Operating temperature - 10 °C to +50 °C
Environmental temperature -40 °C to +65 °C (recommended 5 °C - 35 °C, dry)

Additional information

Wetted parts Sapphire, stainless steel
Interfaces RS485 (4 pin M8 plug)
Power supply 12-28 VDC
Current max. 30 mA (at 24 V)
IP class IP67
Process pressure (max.) 100 kPa (14,5 psi, 1 bar), max. 4 bar
Weight 220g
Length 54mm
Diameter 40 mm (DN40), handle diameter 54 mm

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