LED20G EX Detectors Built-in
The LED20G EX Detectors with UV-VIS Light Emitting Diodes (LED) as a light source are built-in UV-VIS detectors for preparative and flash chromatography for use with an external cell.
| Image | PN | Name | Number of channels (signals) | Request quote |
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PN
LEGEX21X
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Name
Single UV Detector
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Number of channels (signals)
1 fix wavelength
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LEGEX22X
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Name
Dual UV Detector
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Number of channels (signals)
2 fix wavelengths
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- Description
- Parameters
- Files to download 1
The LED20G EX detectors with UV-VIS Light Emitting Diodes (LEDs) as the light source are built-in UV-VIS detectors for preparative and flash liquid chromatography, where an external cell connected by optic cables is needed. The LED20G EX detectors use unique ECOM patented technology that significantly improves the performance of these LED detectors.
Why the ECOM LED20G series detectors have the best parameters on the market among LED detectors.
To explain the difference, the LEDs themselves typically have a peak wavelength tolerance of ± 5 nm and a spectral half-width of 10–20 nm. This is unacceptable for
some applications, as e.g. FPLC, and it also causes nonlinearity. However, ECOM‘s solution allows narrowing the spectral bandwidth and selecting the exact wavelength
from the LED-diode spectrum.
Key features and benefits of LED20G EX detectors:
• Sharp, high, and symmetrical spectral peaks thanks to ECOM-patented technology
• Excellent linearity
• Excellent price-performance ratio
• Compact device dimensions
• Low cell heating due to the LED´s low power supply (0.7 W) which allows use for peptide analysis or FPLC
• Higher sampling speed
• Sophisticated diagnostic software
• Diodes with wavelengths of 254 and 280 nm, other wavelengths available on request
| Number of channels (Signals) | 1 or 2 |
|---|---|
| Linearity | R² ≥ 0.999 up to 3.5 AU |
| Typical spectral half-width | 4 nm |
| Noise level at test cell (254 nm, TC 0.75 s) | ±10 × 10-6 AU |
| Drift at test cell (254 nm after 1 h) | 1 × 10-3 AU/hr |
| Communication | RS232 |
| Power supply | 12 – 24 V DC |
| Power input | 4 W |
| Wavelengths | 254 and/or 280 nm |
| Optical cables | yes |
| Cell connecting | External cell connected via SMA 905 connectors (ordered separately) |
| Dimensions W x H x D | 160 × 55 × 73 mm (6.29 × 2.16 × 2.87 in) |
| Weight | 0.65 kg (1.43 Ib) |
| Filename | Type |
|---|---|
| Info-LED20G-EX-Built-in-detectors-en | pdf (954,15 KB) |
ECOM is a global supplier of scientific and laboratory instruments for liquid chromatography. The company was established in October 1991 and it is focused on research, development, and manufacturing of scientific and laboratory equipment for liquid chromatography. Our innovative R&D and dynamic processes allow us to quickly react on customer’s needs and to propose customised products and solutions. ECOM’s focus on high quality products and responsive service supports high performance of its customers.
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