Inline process refractometers
PR21S
Process refractometers PR21S Inline
Accurate results for automatic and continuous process control
The inline process refractometer PR21S are installed in pipelines of production facilities in order to control and regulate the concentration, mixing and fermentation processes. Thanks to the standardised connections, the measurement device can be easily installed in pipelines. The measuring chamber is made of stainless steel, the measurement prism consists of scratch-resistant and especially chemical-resistant sapphire and is designed to prevent solids from sticking.
- Determination of the refractive index directly in the line within a range of nD 1.3200–1.5200 and 0–90 %Brix
- Measurement intervals approx. 60 seconds
- Automatic temperature compensation (%Brix and freely definable for customer-specific products)
- Integrated sensor for temperature monitoring
- User-defined scale
- Stainless steel measurement chamber that meets all the requirements of the food and pharmaceutical industry, CIP capable
- Sample prisms, made of scratch-proof and chemical-resistant sapphire
- Cleaning manually or via customer process cleaning
- Easy connection with process control system or MPC via analogue outputs (0/4-20 mA)
- Display for the visual monitoring is also available
Typical applications for the PR-Series
The process refractometer is the ideal solution for the chemical, petrochemical, automotive, aviation, metal processing, food, sugar, beverage, paper industries as well as wastewater control.
- Characterisation tests in research and development
- Identity test, purity control and concentration determination of raw materials, semi-finished products and end products
- Tracking of chemical processes during production
- Identity test and concentration determination
- Outgoing goods inspection
- Stability test
- Determination of the sugar concentration
- Determination of the sugar concentration in semi-finished products and end products
- Determination of the solids content in solutions
- Determination of the purity in combination with a polarimeter
- Routine analysis with high sample throughput
- Determination of the sugar concentration in juices and alcohol-free beverages
- Determination of the alcohol or extract content in beer, spices, wine or spirits
- Quality control of dairy products
- Sewage water check
For a comprehensive overview of typical applications visit our campus review Refractometer applications.
Model specifications
| PR21S | |
|---|---|
| MEASUREMENT DATA | |
| SCALES | Refractive index (nD)
Concentration of sucrose [%Brix], User-defined |
| MEASUREMENT RANGE | nD 1.3200–1.5200 *
0–90 %Brix |
| MEASUREMENT ACCURACY | nD ±0.0002
±0.2 %Brix |
| RESOLUTION | nD 0.0001
0.1 %Brix |
| MOUNTING | Inline |
| MEASUREMENT PERIOD | approx. 10 s |
| MEASUREMENT PRISM | Sapphire |
| LIGHT SOURCE | LED |
| WAVELENGTH | 589 nm |
| TEMPERATURE DATA | |
| TEMPERATURE COMPENSATION | ICUMSA or freely definable |
| TEMPERATURE MEASUREMENT | With integrated temperature sensor Pt100 |
| TEMPERATURE MEASUREMENT RANGE | -200–120 °C |
| TEMP. MEASUREMENT ACCURACY | ±0.2 °C |
| TEMP. MEASUREMENT RESOLUTION | 0.1 °C |
| PROCESS TEMPERATURES | 10–60 °C |
| AMBIENT TEMPERATURE | 0–40 °C |
| FURTHER SPECIFICATIONS | |
| PERMITTED PRESSURE LOAD | < 9 bar (relative) |
| IP CODE | IP65 |
| POWER CONSUMPTION (MEASUREMENT OPERATION) | 5 W without display, 6 W with display |
| DIMENSIONS (W X H X D) | 180 mm x 190 mm x 180 mm |
* The measurement range of your device will be configured individually based on the specifications made in the PDF requirement profile provided by us. A binding order only comes into effect once you have returned the fully completed form to us.
Requirement profile
To enable us to adapt the process refractometer optimally to your requirements, we need a requirement profile in which you specify your main individual specifications (measuring range, samples, etc.). A binding delivery can only take place after receipt of the fully completed profile.
