Bypass process refractometer
PRB21S
Process refractometers PRB21S Atline or Bypass
Accurate results for automatic and continuous process control
The bypass process refractometer PRB21S are installed in tanks or boilers using tube connections for the continuous monitoring and control of the concentration of liquids. The sample flows via the bypass into the measurement chamber made of stainless steel. The measurement prism consists of scratch-resistant sapphire and is resistant against solvents and acids.
- Determination of refractive index in the range of nD 1.3200-1.5600 and 0-95 %Brix
- Measurement intervals approx. 10 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 prism, made of scratch-proof and chemicalresistant sapphire
- Cleaning manually or via customer process cleaning
- Suitable for process temperatures up to 60 °C
- Two interfaces (RS-232, analogue 0/4-20 mA)
- A display for the visual monitoring is also available
Typical applications
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
| PRB21S | |
|---|---|
| MEASUREMENT DATA | |
| SCALES | Refractive index (nD)
Concentration of sucrose [%Brix], User-defined |
| MEASUREMENT RANGE | nD 1.3200–1.5600
0–95 %Brix |
| MEASUREMENT ACCURACY | nD ±0.0002
±0.2 %Brix |
| RESOLUTION | nD 0.0001
0.1 %Brix |
| MOUNTING | Bypass |
| 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 TEMPERATURE | 10–60 °C |
| AMBIENT TEMPERATURE | 0–40 °C |
| AMBIENT HUMIDITY | 10-90 % (non-condensing) |
| FURTHER SPECIFICATIONS | |
| PERMISSIBLE PRESSURE LOAD | < 2 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 |
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.
