S 4345/ S 4350 PDA Detector
The S 4345/ S 4350 photodiode-array (PDA) detector is for routine analysis and sophisticated research. The dual lamp design offers a wavelength range of 190 – 720 nm (256 Diodes) or 190 – 1015 nm (1024 diodes) with a low baseline noise. The front-accessible flowcell can be easily exchanged as well as the lamps which are accessible through a side panel in the instrument housing.
Features:
- 4-Channel UV Detector
- Integrated Peak Detector
- Optional – Analog Output
4-Channel UV Detector
The S 4345/ S 4350 PDA Detector features 4-Wavelength channels to measure chromatograms at 4 different wavelengths at the same time. With this feature the optimum wavelength can be selected for each analyzed substance.
Integrated Peak Detector
The integrated Peak Detector works as a basic fraction collector. The peak detection level can be freely programmed for peak start and peak end to enhance the collection purity. An integrated 24V output for switching a solenoid valve is used for the fraction collection, which is automatically operated with a selectable time delay.
Optional – Analog Output
The S 4345/ S 4350 PDA Detector is available with an optional 4-Channel analog output. This D/A converter output option is offered to keep the system flexible to be used with any data acquisition software available.
Technical Specifications:
| Wetted Materials | Stainless Steel / PEEK*, Teflon, Glass |
| Baseline Noise | ± 1 x 10-5 AU (@240 nm, 1 sec. Risetime) |
| Baseline Drift | < 3 x 10-4 AU/h |
| Number of Diodes | 256 or 1024 |
| Wavelength Range | 190 – 720 nm (256 Diodes) 190 – 1015 nm (1024 Diodes) |
| Wavelength Accuracy | 0.5 nm (256 Diodes) 0.3 nm (1024 Diodes) |
| Mean Pixel Pitch | 2.2 nm (256 Diodes) 0.8 nm (1024 Diodes) |
| Resolution (λ FWHM) | 7 nm (256 Diodes) 3 nm (1024 Diodes) |
| Linearity | > 2.0 AU |
| Light Source | Deuterium Lamp, Tungsten Lamp |
| Wavelength Program | Programmable, 10 steps |
| Analog Output | 1x 1V (optional: 4x 1V) |
| Data Rate | 1 Hz – 100 Hz |
| Control Features | Internal Peak Detector with +24 V solenoid switching output |
| Dimensions (W x H x D) | 310 x 165 x 478 mm (S 4345) 396 x 165 x 478 mm (S 4350) |
| Power Supply | 100 – 250 ~V (47 – 63 Hz) |
