OPAL VIS Fixed Wavelength Detector with LED
For VIS range (350-900 nm) with LED diode as light source.
- Description
- Parameters
Opal LED is a detector with an interference filter(optional) and LED diode as light source. By selection of filter and LED diode can be this unit adjusted at one fixed wavelength in range of 350 – 900 nm. LED diode has higher light energy in VIS range of spectrum what cause lower noise and drift level as against deuterium lamp. Noise level at 460 nm is ± 5 x 10-6 AU with test cell. (Filter is not include price)
The unit may be used for routine analytical chromatography as well as for preparative chromatography, according to the selected cell.
The unit is easy to operate; reference and sample signals are available for detector diagnostics as well as information on lamp operating hours.
Output signal is available in both digital and analogue form on the output connector. It is possible to control the unit using the keypad or an RS232 interface. Connecting capillaries are led from the detector’s right side.
This detector was developed and used for CDT analysis with 460/470 nm LED lamp.
Measurement examples:
These examples come from three days continuous testing measurement with test cell. Detector is CDT version with 470 nm LED and without interference filter. Data is from digital output (1mV = 1mAU) with 5 Sps sampling frequency.
Noise
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1 min. peak-peak noise is 0.004mV = 0.004mAU. Last bit is 0.001mV.
Drift
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1 hour drift is 0.04mV = 0.04mAU.
Cells:
Analytical cell HPLC 04 is supplied with unit.
Optional microcell MLCC 02 or preparative cells PLCC 04 or PLCC 05 may be supplied.
Do not forget specify the wavelength in order.
| Typical spectral half-width | According to the LED/filter used |
|---|---|
| Light source | LED Diode |
| Time constant | Ca. 1 s |
| Digital output | 1 V/AU |
| Analog output | 1 V/0.1 AU |
| Communication | RS232 |
| Power supply | 100, 115 and 230V, 50/60 Hz |
| Power input | 55 VA |
| Noise level at empty cell (254 nm, TC 1 s) | ± 5 x 10-6 AU |
| Drift at empty cell (254 nm after 1 h) | 2 x 10-4 AU/hr |
| Materials in contact with mobile phase | PTFE, fused silica, stainless steel, Vespel |
| Wavelength | 350 - 900 nm |
| Dimensions W x H x D | 220 x 170 x 450 mm |
| Weight | 7 kg |
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