The KNAUER AZURA® RID 2.1L is a highly sensitive and cost-effective differential refractive index detector designed for compounds that exhibit little or no UV absorbance. It is ideally suited for the analysis of sugars, alcohols, lipids, polymers, and other non-UV active substances in analytical HPLC and selected GPC applications.
The detector incorporates an intelligently designed optical system with advanced temperature control, ensuring exceptional sensitivity, rapid baseline stabilization, and excellent reproducibility. A long-life LED light source, highly pressure-resistant flow cell, integrated leak management, and advanced diagnostic functions contribute to reliable operation and minimal maintenance requirements.
Key Features
- Differential refractive index detector for analytical HPLC and selected GPC applications
- Ideal for compounds with little or no UV activity
- Suitable for sugars, alcohols, lipids, polymers, and related compounds
- Highly sensitive optical system with advanced temperature control
- Fast baseline stabilization and excellent reproducibility
- Long-life LED light source
- Wide refractive index measurement range
- High-pressure resistant flow cell included
- Low dispersion volume for improved chromatographic performance
- Maximum flow rate up to 10 mL/min
- Integrated internal and external leak management
- Comprehensive diagnostics and GLP reporting
- LAN and analog connectivity
- Compatible with ClarityChrom®, OpenLAB®, Chromeleon™, PurityChrom®, and Mobile Control software
Technical Specifications
Detection System
- Detection channels: 1
- Light source: Long-life LED
- Refractive index range: 1.00–1.75 RIU
Performance
- Noise: ±2.5 nRIU
- Drift: 200 nRIU/h
- Linearity: >1000 µRIU
- Maximum data rate:
- 100 Hz via LAN
- 20 Hz via analog output
Flow Cell
- Included as standard
- Backpressure resistance: 5 bar
- Maximum flow rate: 10 mL/min (water)
- Flow cell volume: 15 µL
- Dispersion volume: 43 µL
- Wetted materials:
- Stainless steel
- Quartz
- PTFE
Temperature Control
- OFF mode available
- Adjustable from 30 °C to 55 °C
- 1 °C increments
System Functions
- Full-range autozero
- Internal leak sensor
- External leak management
- Advanced diagnostics functions
Communication and Control
- Mobile Control software
- Chromatography software control
- Event control
- Analog control
- Terminal protocol
Inputs
- Error (IN)
- Start (IN)
- Autozero
- Flush (IN)
Outputs
- Event 1
- Start (OUT)
- Error (OUT)
- +5 V
- 24 V valve output
Analog Output
- 1 × 0–2.5 V scalable
- 20-bit resolution
- Adjustable offset
Interfaces
- 2 × LAN (RJ-45, dual IP stack)
- USB (service only)
- Multi-pin connector
- Analog interface (cinch connector)
GLP Functions
- Operating hours tracking
- Light source operating hours
- Detailed GLP reports
Environmental Conditions
- Operating temperature: 4–40 °C
- Humidity: <90% non-condensing
Power and Dimensions
- Power supply: 100–240 V, 50–60 Hz
- Power consumption: 65 W
- Dimensions (W × H × D): 361 × 158 × 523 mm
- Weight: 10.8 kg
Optional Accessories
- Mobile Control software interface
Applications
- Sugar analysis
- Carbohydrate profiling
- Alcohol determination
- Lipid analysis
- Polymer characterization
- Gel permeation chromatography (GPC)
- Food and beverage testing
- Pharmaceutical analysis
- Chemical and petrochemical laboratories
- Quality control and research applications
