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UNICO SQ-4802 is a Double beam design. It is a stand-alone model with 1.8 nm fixed bandwidth and has all the features that SpectroQuest line offers in a stand-alone unit. The two detectors are measuring sample and reference respectively and simultaneously for optimizing measurement accuracy. It provides excellent performance for measurements in the range of 190nm to 1100nm. It is suitable for pharmaceutical, biochemical and clinical lab applications as well as routine applications such as quantitative analyses, kinetics, spectrum scanning, multiple components and DNA/Protein. Optional PC download software and PC Windows® application software make this instrument versatile.

SPECIFICATIONS SpectroQuest 4802/4802E
Optical Specifications
Wavelength Range 190 - 1100 nm
Spectral Bandwidth 1.8 nm
Monochromator Double beam Littrow type, grating 1200 lines/mm
Wavelength Accuracy ±0.3 nm
Wavelength Repeatability ±0.2 nm
Wavelength Calibration automatic at start
Light Source Tungsten Halogen/Deuterium  Lamp
Detector Solid Silicon Photodiode
Photometric Readout 1/4 VGA 320X240 pixels backlit LCD
Photometric Range 0 - 200%T
-0.3 - 3.0A
0 - 9999C
Photometric Accuracy ±0.3%T
Zero Drift < 0.002A per hour after warm-up
Baseline Flatness ±0.004A
Stability 0.001A/h at 500 nm
Stray Light < 0.15%T
Scanning Speed Hi, Med., Low. Max. 1000 nm/min
Physical Characteristics
Standard Sample Holder Single Cell Holder for 10mm cell, reference and sample
Ports USB, Parallel port
Dimensions 620(L) x 400(W) x 280(H) mm
Weight 24 kg / 53lbs
Shipping Dimensions 720(L) x 525(W) x 370(H) mm
Shipping Weight 28 kg / 62 lbs
Power Requirements 115V/60Hz ( SQ4802) or 230V/50Hz (SQ4802E), switchable
Operating Temperature Room temperature: 22 ±2°C
Humidity Range   less than 85%
Safety Certificate CE


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