SPD-20A/20AV UV-Vis Detector

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Prominence HPLC UV-Vis Detectors


Part of the SPD-20 Series, which also includes the SPD-M20A Photo Diode Array Detector, the SPD-20A/20AV UV-Vis detectors offer an exceptional level of sensitivity and stability. Taking sensitivity to the limit, the SPD-20A/20AV has a noise level of 0.5×10-5 AU max., making it the world's most sensitive UV-Vis detector (ASTM Standards). One mode of the SPD-20AV allows both the deuterium and tungsten lamps to be lit simultaneously, enabling high-sensitivity wavelength-programming detection for ultraviolet light and the entire visible-light range.



Greater Baseline Stability
Supplied as standard, a temperature-controlled flow cell eliminates inconsistencies caused by changes in absorbance due to shifts in room temperature. This helps increase the baseline stability and the analysis reliability.

Superior Linearity - 2.5AU
Using newly developed signal processing technology, the stray-light correction function has been enhanced, and the linearity has been improved. This expanded linearity combines with various noise-reduction technologies to provide users with a wide dynamic range and allow for the analysis of your target compound and minor impurities in a single run.

Internal Validation Protocol
The incorporation of a low-pressure mercury lamp for wavelength calibration ensures simple calibration in the ultraviolet region.

Dual-Wavelength Measurement
Monitor two components in the UV or VIS range simultaneously

Simultaneous D2 and W lamp Illumination
Available with the SPD-20AV, users can eliminate warm-up time and baseline disturbances during wavelength programming between the UV and Visible range. With both lamps lit, high-sensitivity analysis throughout the full wavelength spectrum is ensured.


  SPD-20A SPD-20AV
Light source Deuterium (D2) lamp Deuterium (D2) lamp, tungsten (W) lamp
Number of diode elements None
Wavelength range 190 to 700 nm 190 to 900 nm
Bandwidth, slit width 8 nm
Wavelength accuracy 1 nm max.
Wavelength precision 0.1 nm max
Noise 0.5 X 10-5 AU (under specified conditions)
Drift 1 X 10-4 AU/h (under specified conditions)
Linearity 2.5 AU (ASTM standard)
Functions Dual-wavelength detection in the range 190 to 370 nm and upwards of 371, ratio-chromatogram output, wavelength scanning
Cell Optical wavelength: 10 mm, capacity: 12µL, withstand pressure: 12 MPa
Cell temperature-control range 5oC above room temperature to 50oC
Web control Parameter setting, log management, monitor detector output, management of consumable parts, etc. Parameter setting, log management, management of consumable parts, etc.
Buffer memory Refer to CBM-20A/Alite
Operating temperature range 4oC to 35oC
Dimensions, weight 260 (W) x 140 (H) x 420 (D) mm, 13 kg
Power requirements 100 VAC, 160 VA, 50/60 Hz

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