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Instrument Database:
ESA Inc. - Model 526 / 528 Variable Wavelength UV/VIS Detector
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| Year of introduction |
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| Status |
historical ( out of sale ) |
| Company |
ESA Inc.
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| Categories |
Chromatography: LC-Detector: UV/Vis
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- Double-beam, variable wavelength capability
- Programmable wavelengths: 190 - 900 nm
- Easy-to-use Control Pad
- Available with a wide range of flow cells
- Automatic lamp startup/shutdown
- Pre-aligned lamps for easy changeover
- Optimized for use with ESA Coulometric electrochemical detection
- Low noise and low drift for increasing sensitivity and stability in analyses
The Model 526/528 detectors provide extremely low operating noise levels to 0.6 x 10-5 AU. This performance can meet severe analytical requirements for higher sensitivity. The improved stability also ensures reliable analyses not dependent on the ambient conditions.
High response and low noise for ultra-high-speed analyses is ensured at a response of 0.1 sec. This provides sharpness of chromatographic peaks for allowing ultra-high-speed analyses with high sensitivity.
Automatic wavelength calibration for UV range The detector unit has a built-in mercury lamp for checking wavelength accuracy. Using its 254nm emission line, an ultraviolet wavelength frequently selected in liquid chromatography can be checked. A total of three wavelengths are checked at a time for enhancing reliability in wide-wavelength-range analyses.
Automatic lamp shutdown during inactive periods increases overall lamp life. Lamp usage is easily monitored through the front panel keypad and display. Simple programming is provided for wavelength scanning and range changes during an analytical run.
Optional flowcells are available for other many applications. Long-life replacement lamps and accessories are also available.
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| Specifications |
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Optics Double beam and ratio mode
Calibration Built-in Hg lamp
Range Model 526: 190 to 600 nm
Model 528: 190 to 900 nm
Light source Model 526: Deuterium (D2) lamp
Model 528: D2 lamp and Tungsten (W) lamp
Wavelength Setting By keyboard or external communication (e-Line)
Accuracy +/- 1 nm
Bandwidth 6 nm
Noise < 0.6 x 10-5 AU
Drift < 1.0 x 10-4 AU/h
Response 0.05, 0.1, 0.5, 1, 2, 4, 8 s
Programs 9 programmable steps
Max. Time 600 min
Max. Steps 100 (in 9 programs)
Available functions Wavelength, time, autozero, and hold
External I/O Contact Terminals Time program start, error input/output, busy output, auto zero input, marker input (Option), lamp off
Display Function 40 characters x 2 lines on backlighted LCD
GLP functions Auto calibration using Hg lamp
Lamp energy check
Log for usage
Replacement date
Serial number registration in unit memory
Flow Cell Quartz cell (optical path length 10 mm, volume 13µl)
Flow Cell Max. Pressure 1.0 MPa
Safety Built-in leak sensor, error handling
Power Requirements 100- 240 VAC 50/60 Hz (85 W)
Dimensions 340 (W) x 400 (D) x 150 (H) mm
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