Highly sensitive refractive index detector for liquid chromato­graphy

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Article No.: ADD31
Articlename: AZURA RID 2.1L, analytical

Highly sensitive refractive index detector for liquid chromato­graphy

Analytical refractive index detector

The AZURA RID 2.1L 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. This instrument is designed for use in analytical 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, its low internal volume of 43 µl from the inlet to the flow cell and 10 ml/min maximum flow rate make the AZURA RID 2.1L the perfect choice for most laboratory tasks. This detector can be controlled with OpenLAB® EZChrom, ClarityChrom®, Chromeleon® 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.

Key Features

Technical Data


Detector type Refractive index detector
Version Analytical
Light source Long-life LED
Detection channels 1
Refractive index range 1.00 - 1.75 RIU
Noise ± 2.5 nRIU
Drift 200 nRIU/h
Linearity > 1000 µRIU
Flow cell 5 bar back pressure resistant flow cell (included)
Max. flow rate 10 ml/min (pure water)
Flow cell volume 15 µl (43 µl dispersion volume)
Wetted materials Stainless steel / fused silica / PTFE
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.
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