Beckman DU-640 UV-Vis spectrophotometer with sipper
Beckman DU-640 UV-Vis spectrophotometer with sipper.
The Beckman DU-640 is a full-featured scanning spectrophotometer with micro-focused beam technology provides precise and accurate results for samples as small as 5uL. The micro-focused beam delivers the full energy of the beam to the microsample, unlike standard beams, which can lose as much as 80% of their energy when applied to a microvolume sample.
Wavelength Range: 190 to 1100 nm.
Wavelength Accuracy: +/-0.2 nm (at D2 peak 656.1 nm).
Wavelength Repeatability: +/-0.2 (at D2 peak 656.1 nm).
Spectral Bandwidth: <=1.8 nm.
Photometric Readout: -0.300 to 3.000 A or 0.0 to 200.0 %T.
Photometric Accuracy: +/-0.005 A (at 1A with NIST 930D solid filter at 546 nm).
Stray Light: <0.05 %T (using NaI at 220 nm per ASTM E387-84).
RMS Noise: <0.0005 A RMS (OA, average readings at 500 nm).
Scanning Speeds: 120, 240, 600, 1200, 2400 nm/minute.
Dimemsions: 27in W X 23in H X 21in D
Weight: 73 lbs.