UV-VIS Spectrophotometer


Minimal Training - Easy to Use
The large liquid-crystal display (LCD) has been incorporated with easy to follow prompts, large fonts, and graphics to help reduce the time needed to get your results. The description on the instruments' soft keypad quickly guides you through specific programs.

Mighty Performance with Quantitative Methods

Everything from simple concentration measurements up to sophisticated quantitative calibration curves. Some of the standard functions include:
  • Factor method for input of simple constants
  • One point calibration curve with one standard sample and a point through the origin.
  • Multi-point calibration curve of the application requiring various standards. 1st, 2nd, and 3rd order polynomial filling for calibration come standard.
  • Two or three wavelength quantitative analysis for measuring turbid samples or for measuring the effects of another distinguishable component.

Maximum Wavelength Scanning

The UVmini comes standard with a Spectrum mode that allows for full spectral data acquisition over the wavelength range of 190nm to 1100nm. Upon completion of the spectral scan, the peaks and valleys can be marked within a few seconds. The standard peak pick function allows for clear and accurate detection of the most sensitive wavelengths.

Mega Data Archiving Capabilities

Methods, results and raw data can be saved on either the standalone instrument, optional dedicated IC Data cards, or within a directory of an IBM-Compatible PC with the help of the optional NEW UV DATA MANAGER software. This provides unlimited storage and expanded capabilities in archiving methods and management of essential results.

Multiple Print Utilities

The UVmini provides flexible print options with the use of either a thermal screen copy printer or a variety of different PC printers. The screen copy printer enables instant printing of tabulated data, as well as copied information directly from the screen. The PC printers can be utilized for the same functions and for finer print resolution of spectral data.

Mini Effort to Customize

With over 35 different types of attachments including multicell positioners, sippers, temperature control devices, the UVmini can provide all the tools necessary to fit your specific application. The IC program cards quickly expand the functionality of the instrument. By simply inserting the appropriate IC card into the slot on the front panel, dedicated applications such as DNA/Protein analysis can now be performed.

Hardware Specifications UVmini-1240

Item UVmini-1240
Spectrum bandwidth 5 nm
Wavelength range 190.0 to 1100.0 nm
Display wavelength 0.1 nm step
Selectable wavelength 0.1 nm step (1nm step in spectrum mode)
Wavelength accuracy ± 1.0 nm
Wavelength repeatability ± 0.3 nm
Scan speed Wavelength change: approximately 3800 nm/min
Scan: approximately 24 to 1400 nm/min
Light source change Selectable from following 3 types;
  - Auto change with wavelength
    Selectable wavelength 295 nm to 364 nm: 1 nm interval
    Recommended wavelength: 340 nm
  - Halogen lamp (WI) only
  - Deuterium (D2) lamp only
Stray light less than 0.05%
(220.0 nm NaI, 340.0 nm NaNO2 & UV39)
Measurement method Single beam measurement
Photometric range Absorbance: −0.3 to 3.0 Abs
Transmittance: 0.0 to 200%
Recording range Absorbance: −3.99 to 3.99 Abs
Transmittance: −399 to 399%
Photometric accuracy ± 0.005 Abs (at 1.0 Abs)
± 0.003 Abs (at 0.5 Abs)
Photometric repeatability ± 0.002 Abs (at 1.0 Abs)
Drift less than ± 0.001 Abs/h (after 2 hr warm-up)
Baseline flatness ± 0.010 Abs (after 1 hr warm-up, at 1100 to 200 nm)
Noise less than 0.002 Abs, Peak to Peak
less than 0.0005 Abs, RMS
Light source Auto correction with the computer memory
20W Halogen lamp (long-life 2000 hours)
Deuterium lamp (socket type)
Auto adjustment for maximum sensitivity
Monochromator Incorporates aberration-correcting concave blazed holographic grating
Detector Silicon photodiode
Sample compartment Interior dimensions W110.0 × D230.0 × H105.0 mm
(partial depth: 155.0 mm)
2 screw port for option accessory installation
Display 6 inch LCD (320 X 240 dot) with CFD lighting with contrast adjustment
Power supply 100 to 120 V 50/60 Hz 160 VA
220 to 240 V 50/60 Hz 160 VA
Dimensions W416 X D379 X H274 mm
Weight 11 kg
Ambient temperature 15 to 35°C
Ambient humidity 45 to 80%, less than 70% if over 30°C

Software Specification


  • Fixed wavelength measurement; T%, ABS
  • Quantitation with K-factor method
  • Save/Load of the result data table
  • Auto printout of measured data, Auto transfer via serial port
  • Optional cell positioners for continuous measurement of samples


  • Spectrum measurement
    - Measuring mode: ABS, T%, E
    - Scan Speed: Very fast, Fast, Medium, Slow, Very slow
    - Scan times: 1 to 99
    - Spectrum display: Selectable overlay or sequential
  • Data processing of spectrum data
    - Detection of peak and valley (both up to 20)
    - Zoom in and zoom out (only vertical axis can zoom out)
    - Data read out with cursor keys
    - Data save/load (Standard: 6, Data pack: 21)
  • Spectrum data transfer via serial port
  • Spectrum printout (A5 size, with ESC/P type printer


  • 1 wavelength, 2 or 3 wavelength quantitation
  • Calibration curve
    K factor method with auto concentration calculation One point calibration curve with auto concentration calculation Multi-point calibration curve
    - Number of standards (2 to 10)
    - Calibration curve: 1 to 3 order calibration curve
    - Selection to pass or not pass on original point
    - Spectrum display: Selectable overlay or sequential
    Repeat measurement of standards (1 to 10 times) and creation of the calibration curve with the mean values of measurement data Display of the calibration curve Display of the correlation factor of the calibration curve
  • Quantitation measurement
    Repetition (1 to 10 times) and the quantitation with the mean value
  • Save/load of the measured data table
  • Auto printout of the measured data, Auto transfer via serial port
  • Optional cell positioners for continuous measurement of samples

For Research Use Only. Not for use in diagnostic procedures.

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