ESA Coulochem III Electrochemical Detector

The ESA Coulochem® III Detector is a high-sensitivity electrochemical detection unit. It optimizes the detector for the low signal in DC and achieves high sensitivity from capillary to normal bore chromatography. To optimize the application of potentials and the duration of waveforms, the pulse mode improves variable timing. The scan mode helps in selecting the optimal potentials.

Specifications:

- Detector configuration: DC potentiostat for 1 or 2 cells and potentiostat for guard cell and/or scan mode/pulse mode
- Operating modes: DC, Pulse, Scan (time line method can be appended to DC and pulse methods)
- Potential range: ± 2000 mV in 1 mV steps
- Full-scale current range: 10 pA to 1 mA in 1-2-5 sequence (DC mode)
- Filter time constants: 0.2 to 10 seconds in 1-2-5 sequence (DC mode)
- Typical noise: < 750 fA (0.75 pA) with 500 MΩ, 0.47 µF test load and a 2-second filter (DC mode)
- Signal output: ± 100 mV, ± 1 V
- Output resolution: 24-bit bipolar
- Guard cell potential: ± 2000 mV in 1 mV steps
- Event marking: Triggered by front panel keyboard, timed operation or RS-232C control
- Autozero: Triggered via front panel keypad, rear panel contact closure, timed operation or RS-232C control
- Function keys: Autozero, Event Mark, Cell On/Off, Run/Stop
- RS-232C interface capability: Full parametric instrument control of DC and pulse
- Method storage: Up to 25 methods (any combination of DC, Scan, Pulse and Time Line)
- Power: 100-240 V AC, 50/60 Hz, 24 VA
- Detector dimensions: 19.5" (L) x 9" (W) x 11.25" (H), (49.5 cm x 23 cm x 28.6 cm)
- Detector weight: 6.7 kg (14.8 lbs) detector only with DC and Pulse/Scan
– Certifications: UL, CUL and CE
– Other: Active input for cell protection
– Time line specifications (DC and pulse mode):
- Programmable changes: Selectable per channel at times from 0 to 9999.99 minutes in 0.01-minute steps
- Autozero, Event Mark: Independently selectable at program start and at each current range change
- Program start: Via front panel keyboard or rear panel contact closure
- External device control: Control of up to 5 external devices
- Program control: Current range, autozero, event mark, potential, filter constant
- Program repetitions: 1 to 9999
- Automated CV curve: Start and stop potential, potential increment for automatic determination of optimal operating potential

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