LED20G EX Detectors Built-in

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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. 

Availability
Manufacturer
ECOM spol. s r.o.
Choose variant:
Image PN Name Number of channels (signals) Request quote
Image
LED20G EX Detector, Single, PN LEGEX21X
PN
LEGEX21X
Name
Single UV Detector
Number of channels (signals)
1 fix wavelength
Actions
Image
LED20G EX Detector, Dual, PN LEGEX22X
PN
LEGEX22X
Name
Dual UV Detector
Number of channels (signals)
2 fix wavelengths
Actions

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 it is needed to use an external cell connected by optic cables. 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 detector.
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 to narrow the spectral bandwidth and to select 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 LED´s low power supply (0.7 W) that 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 2 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-FIX-EX-Built-in-detectors-en pdf (682,01 KB)