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    Product Name Yoke UV1900 spectroPhotoMeter YUEFENG 770S UV-Visible SpectroPhotometer
    Product Price In coming $2591.00
    Details Details
    Model comparison
    Spectral Type UV-Vis UV-Vis
    Optical Path Double-Beam Pseudo-Double-Beam
    Dispersion Grating
    Detection Scanning
    Light Source Tungsten Deuterium Tungsten Deuterium
    Wavelength 190-1100nm 190-1100nm
    Accuracy ≤0.5nm ≤0.5nm
    Bandwidth ≤2nm ≤2nm
    Detector Silicon Photodiode
    Stray Light ≤0.05%T ≤0.2%T
    Parameter comparison
    Optical inspection system Double beam of light system Proportional double beam of light, 1200/mm Holographic grating
    Light spectrum bandwidth 2nm
    wavelength Range 190~1100nm
    Wavelength accuracy +/- 0.1Nm (D2 656.1nm )， +/- 0.3nm full band
    Wavelength, repeability ≤0.1 nm
    Photometric Range 0~200%T、-4~4A 0.0%(T)~200.0%(T)；-0.301~4.000(A)
    Photometric accuracy ±0.002A(0~0.5A)、±0.004A(0.5~1A)、±0.2 %T (0~100 %T)
    Luminosity, sexual repeability ±0.001A(0~0.5A)；±0.002A(0.5~1A)；±0.1%T(0~100%T)
    stray light ≤0.03%T ≤ 0.15% (T) (at 220 nm, as NaI) (at 360 nm, as NaNO2)
    Noise level ≤0.0004 Abs/h 100%(T):≤0.2%(T) 0%(T):≤0.1%(T)
    stability +/- 0.0003A (at 500nm)
    Baseline flatness ≤±0.0005A ±0.002A(200nm~1090nm)
    drift ≤± 0.0004 Abs/h ≤ 0.0009A/0.5h (2h after startup, 250nm, 500nm)
    Operating Mode T、A、C、E
    display 320 * 240 Highlight 6
    Illuminant 190 nm~1100 nm Deuterium lamp, tungsten halogen lamp
    Detector Imported silicon photodiode
    keyboard Membrane button
    data interface Parallel interface or USB interface
    power supply AC 220V/50Hz or AC 110V/60Hz
    weight 30kg