EH Systems, Capillary Electrophoresis, C4D-720 detector module

By: Eh Systems  09-12-2011
Keywords: Uv Absorption, Conductivity Detector, Detector Module,

C4D-720 capacitively coupled contactless conductivity detector module

The C4D-720 is a compact conductivity detector module. It is based on the simple principle. The AC voltage is not directly applied to the segment on the capillary, but coupled through two cylindrical capacitors. The resulting current is monitored and recorded. We take the current divided by the excitation voltage and get the conductivity. The main advantage of this detection method is the elimination of making any window on the capillary and very high sensitivity can be achieved for analyzing small ions which are rather difficult to be detected by UV absorption method.

C4D-720 Specifications

Exciter Voltage 0 - 200V p-p progammabe
Exciter Frequency 64 - 640 kHz progammabe
Noise level at empty cell (time constant 1 s) ±2x10-4 RCU
Drift at empty cell (constant room temperature, steady operation for 1/2 to 1 hrs) 2x10-3 RCU/hr
Capillary O.D. 365 µm
Capillary I.D. 100, 75, 50, 25, 10 µm
Time constant 10, 5, 2, 1, 0.5, 0.2, 0.1, 0.05, 0.04, 0.033, 0.02, 0.016, 0.01 sec.
Display 122x32 Graphic LCD
Output 1V/AU at scale = 1
Output scale 2, 1, 0.5, 0.2, 0.1, 0.05, 0.02, 0.01, 0.005, 0.002, 0.001
Interface RS232 (USB, TCP/IP optional)
Input volatge 220VAC/50Hz, 115VAC/60Hz
Power input (wattage) 75 VA
Dimensions (Width x Depth x Height) 215 x 135 x 100 mm
8.46 x 5.31 x 3.95 in.
Weight 3 kg

Keywords: Conductivity Detector, Detector Module, Uv Absorption,

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