High-Resolution Refractometer

SCHMIDT + HAENSCH is proud to present the in-Line Process Refractometer High Resulution2  model. This inline refractometer is perfect for all applications where a measuring needs to be as precise as laboratory testing. The iPR HR2 is unrivaled in accuracy and can most certainly be claimed the world’s most precise process sensor.

With a special water cooling system, the iPR HR2 not only allows measuring in hot process environments and cleaning in place (CIP) – it also and ensures reliable measurements throughout its long product life span. 

ID-N° 10990 VariVent Connection 

ID-N° 10991 TriClamp Connection 

ID-N° 10992 APV Connection 


  • World’s most precise process sensor with a broad variety of applications
  • Equals laboratory analysis
  • perfect reliability in even the toughest process conditions and testing of aggressive chemicals
  • simple and certified calibration of the highest standards
  • Technically easy to implement and low-cost connections
  • compliant with international food & beverage regulations and standards

Easy to Use

This device helps you to perfectly monitor and control your production process. Similar to laboratory refractometers iPR HR2 is a stand alone process sensor with an integrated, illuminated display, which does not require an external electronic unit. Its special design and electronic configuration makes it highly flexible and very easy to operate. Connecting and programming the device using Windows software is also very simple. Optionally, a data logger is available.


This device delivers the highest resolution on the worldwide market: up to 5 x 10-6 RI (2 x 10-3 Brix), precision up to +/- 4 x 10-5 RI (+/- 2 x 10-2 Brix).

The iPR HR2 delivers lab quality industrial measurements for food and beverage, chemical, and packaging industries, as well as for the pharmaceutical and medical industries.

Applications include condensate measurement, control of disinfectants for packaging, purity control for pharmaceuticals, liquid-liquid extraction and many more.


Product in depth

This process refractometer is robust in the roughest conditions while being the world’s most precise process sensor. With a certified IP69K protection class tested by the reliable German standardization institution TÜV, it can simultaneously withstand aggressive chemicals and high temperatures. The iPR HR2 guarantees high resolution and high precision in even the toughest conditions.

For flexibility in use, the product has two analog and two digital interfaces so that the measuring head can be fully and easily integrated into the production process.

A selection of cost-effective process flanges, the VariVent, and other connection devices accompany the iPR H2, with which the instrument is technically easy to implement.

With the pig pipe addition, the iPR HR2 allows for Cleaning In Place (CIP).


Measuring range 11.3200 – 1.3720 RI / 0 – 25 Brix
Measuring range 21.4200 – 1.6000 RI / 50 – 100 Brix
Resolution0.000005 RI / 0.002 Brix
Reproducibility± 0.00004 RI / ± 0.02 Brix at 25°C ± 0.01 Brix up to 2%
Process temperature-10°C up to + 100°C (with water cooling installed)
Ambient temperature-10 – 45°C
Pressure load capacityMPa (145 psi, 10 bar) – up to 30 bar available with APV conncection
External power supply20 V – 30 V DC ( at 24 V and 0.11 A)
Interfaces2 insulated 4 – 20 mA analog outputs
2 digital output switch (up to 1 A)
1 serial output (RS232, alternativly RS485 or USB)
Power supply24 V DC
Light source / wavelength589 nm LED
Process contact materialSapphire, Stainless steel or Hastelloy
Mounting accessoriesVariVent (Tuchenhagen), APV or TriClamp*

* Optional



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