Inline process refractometer
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Inline real-time measurement in the pipeline. Range of nD 1.3200-1.5200 and 0-90 %Brix
The PR21S inline process refractometer is installed in pipelines of production plants to control the concentration, mixing and fermentation processes. Thanks to the standardized connections, the measurement devices can be easily installed in pipes. The measurement chamber is made of stainless steel, the measurement prism of scratch-resistant and particularly chemical-resistant sapphire. It is designed so that solids do not stick. The PR21S is used in the chemical and petrochemical industries, in automotive and aircraft manufacturing as well as in the food, sugar and beverage industries and for waste water monitoring.
Basic function
- Measurement in refractive index, %Brix or a user-definable scale
- Automatic temperature compensation (%Brix and freely definable for customer-specific products)
- Integrated sensor for temperature monitoring
- Stainless steel measurement chamber and sample prism, made of scratch-resistant and chemical-resistant sapphire
- Cleaning via customer-side process cleaning sequences, CIP-capable
- Suitable for Process temperatures up to 60°C and relative pressures up to 9 bar
- Simple connection with process control system or PLC via serial or two-part potential-free current interface (0/4-20 mA)
- Interfaces: RS-232; additional RS-232 for display, 2x analog 0(4)-20 mA; relay input, 2x relay output
Technical data
| Spezifikation | Prozessrefraktometer PR21S Modell |
|---|---|
| Messbereich 1) |
nD 1,3200–1,5200 0–90 %Brix |
| Messgenauigkeit 2) |
nD ±0,0002 ±0,2 %Brix |
| Auflösung |
nD 0,0001 0,1 %Brix |
| Messzeit | Ca. 10 Sekunden |
| Wellenlänge | 589 nm |
| Prozessdruck (Relativ) | 0–9 bar |
| Prozesstemperatur | 10–60 °C |
| Umgebungstemperatur | 0–40 °C |
| Umgebungsluftfeuchtigkeit | 10–90 % (nicht kondensierend) |
| Temperaturmessgenauigkeit | ±0,2 °C |
| Skalen | Brechungsindex (nD), Konzentration von Saccharose (%Brix), Benutzerdefiniert |
| Justierung & Einrichtung 3) | Über PC/Laptop |
| Probenberührende Teile | Saphir, PTFE, FKM, Edelstahl (1.4305) |
| Einbauart | Inline |
| Zusätzliche Funktionen |
Temperaturkompensation (ICUMSA oder frei definierbar) Schutzart IP65 (IP67 Anschlüsse) CIP fähig bis 120 °C |
| Schnittstellen | 1x RS-232, 1x RS-232 für Display, 2x analog 0(4)-20 mA; 1x Relais Eingang, 2x Relais Ausgang |
| Maße (B x H x T) | 220 mm x 190 mm x 220 mm |
| Gewicht | 3,5 kg |
| Betriebsspannung | 24 VDC (Min: +18 VDC; Max: +30 VDC) |
| Leistungsaufnahme (Messbetrieb) | 5 W (ohne Display) ; 6 W (mit Display) |
| Leistungsaufnahme (Max.) | 6 W (ohne Display) ; 7 W (mit Display) |
¹) Measurement range of the device is configured individually
²) Under normal conditions for measurement of refractive index (λ = 589 nm, 20 °C, 1013 hPa, 50 % relative humidity)
³) Firmware is included on the device. Separate software is not required.
Standards and guidelines
- Thanks to flexible inline integration, KRÜSS Optronic process refractometers can be seamlessly integrated into existing plant structures and support efficient quality control in real time.
- For connectivity, 2 serial interfaces, 2 analog outputs (0/4-20 mA), a switch input, 2 switch outputs and a LAN connection are available. Integration into process control systems is straightforward using established industry protocols. An optional display enables local operation, status display and fast process control – ideal for modern Industry 4.0 applications.
- CIP (clean-in-place) process cleaning guarantees high process reliability thanks to standardized processes and reproducible hygiene quality, which is very important in the food industry, for example.
- In industrial processes in particular, it is important to know which guidelines and standards apply in order to ensure best practice, traceability and good manufacturing practice (GMP). For your information, we have compiled an overview of important standards for refractometer measurements.
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