KNAUER AZURA RID 2.1L Refractive Index Detector

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