Conductivity monitor with flow cell for up to 100 ml/min and optional pH measurement

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Article No.: ADG30GD
Articlename: AZURA CM 2.1S with flow cell up to 100 ml/min

Conductivity monitor with flow cell for up to 100 ml/min and optional pH measurement

Conductivity monitor with optional pH measurement

The AZURA CM 2.1S is a reliable conductivity monitor which is usually utilized in FPLC to follow salt gradients. By adding a pH sensor also pH values can be measured.

Wetted parts are completely biocompatible. The contactless measurements of conductivity reduces the risk of carryover to a minimum.

The flow cell covers a flow rate up to 100 ml/min and is delivered with the CM 2.1S.

Technical Data

Flow cell

Flow cell type Contactless conductivity flow cell
Biocompatible Yes
Connection of flow cell Female 10-32" UNF or M8x1 thread (PEEK) – both included in shipment
Capillary connection 1/16" or 1/8" – both included in shipment
Wetted materials PEEK
Flow cell volume 300 µl
Max. flow rate 100 ml/min (recommended: 10 – 100 ml/min)
Maximum pressure 100 bar


Detector type Conductivity monitor
Measurement accuracy Conductivity: ± 2 % full scale value (0.1 - 300 mS/cm), ± 5 % full scale value (300 - 999 mS/cm)
Temperature: ± 1.0°C
pH 2 - 12: ± 0.2 pH (15 - 25°C), ± 0.5 pH (4 - 40°C)
Measurement range Conductivity: 0.1 - 999 mS/cm
pH: 0 - 14
Linearity Conductivity: ± 1 % full scale value (0.1 - 300 mS/cm), ± 1 % full scale value (300 - 999 mS/cm)
pH measurement Optionally
Maximum data rate 5 Hz
Supported electrodes All pH electrodes with BNC connector and a voltage output of maximal ± 500 mV


Analog outputs 2 channels (conductivity and pH value – not active if remote controlled by software)
DAC 18 bit
Digital outputs LAN; RS-232

Technical parameters

GLP Electronic serial number
Display LCD, 2 x 8 characters
Ambient conditions Operating temperature: 4 – 40°C, 39,2 – 104 °F
Relative humidity: below 90 %, non condensing


Power supply 100 - 240 V, 50 - 60 Hz, max. 20 W
Dimensions 121 x 129 x 187 mm (W x H x D)
Weight 3.2 kg

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 for 59 years.
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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

Innovation and quality - since 1962. Made in Germany.

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