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Article No.: ADD38
Articlename: AZURA RID 2.1L, high flow compatible

High flow rate compatible RI detector for LC and process technology

Preparative refractive index detector

The AZURA RID 2.1L HighFlow is a sensitive and competitively priced differential refractometer. It is suitable for detecting compounds with little or no UV activity such as alcohols, sugars, lipids or polymers in high concentrations. This instrument is designed for use in semi-preparative and preparative HPLC (high performance liquid chromatography) as well as under certain conditions for GPC (gel permeation chromatography) applications. The intelligently designed optical unit with advanced temperature control ensures high sensitivity, fast baseline stabilization, and excellent reproducibility. Furthermore, the long-life LED, highly pressure resistant flow cell, improved safety features and enhanced diagnostics functions guarantee easy handling and minimal maintenance. The wide linear dynamic range and 100 ml/min maximum flow rate make the AZURA RID 2.1L HighFlow the perfect choice for most laboratory tasks. This detector can be controlled with OpenLAB® EZChrom, ClarityChrom® and PurityChrom® Bio software, as well as from the AZURA Mobile Control app (stand-alone operation), via LAN or through analog input/output, allowing it to be integrated into almost any LC system. Learn more in our video:

Key Features

Technical Data


Detector type Refractive index detector
Version Preparative
Light source Long-life LED
Detection channels 1
Refractive index range 1.00 - 1.75 RIU
Noise ± 50 nRIU
Drift 2000 nRIU/h
Linearity > 4000 µRIU
Flow cell 5 bar back pressure resistance flow cell (included)
Max. flow rate 100 ml/min (pure water)
Flow cell volume 9 µl
Wetted materials Stainless steel / fused silica / PTFE / PEEK
Temperature control OFF, 30 - 55°C (1°C increment)
Time constants 0.00 / 0.01 / 0.02 / 0.05 / 0.1 / 0.2 / 0.5 / 1.0 / 2.0 / 5.0 / 10.0 s
Maximum data rate 100 Hz (LAN)/ 20 Hz (Analog)
Autozero Full range
Leak sensor Yes (internal and external leak management)


Inputs Error (IN), Start (IN), Autozero, Flush (IN)
Outputs Event 1, Start (OUT), Error (OUT), + 5 V, 24 V Valve
Analog outputs 1 x 0 - 2.5 V scalable, 20 bit, offset adjustable
Control Mobile Control, software, event control, analog, terminal protocol
Interfaces 2 x LAN (RJ-45, dual IP-stack), USB (service only), multi-pin connector, analog (RCA cinch connector)

Technical parameters

GLP Detailed report including operating hours and light source operating hours
Display Mobile Control (optional)
Ambient conditions Temperature range: 4 - 40°C, 39.2 - 104°F
Humidity: below 90 % noncondensing


Power supply 100 - 240 V, 50 - 60 Hz, 65 W
Dimensions 361 x 158 x 523 mm (W x H x D)
Weight 10.8 kg


Optional accessories Mobile Control

Documents and more information

Certified Quality 

KNAUER is known for the quality of its products and has been certified several times. We produce high-tech laboratory instruments for research, routine analysis and production.
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In addition, we have extended documentation about all our products, including CE Declarations of Conformity.
See all CE Declarations of conformity

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