COLO.Science · Spectroscopy & Color · UV/Vis spectrophotometers
LEGEND UV/Vis spectrophotometer with PC software — single and double beam, 190–1100 nm
The LEGEND UV/Vis spectrophotometer with PC software is a series of six models on one platform with a 7″ colour screen: single beam K60, K61 and K61S and double beam K80, K81 and K81S, each with a spectral bandwidth of 2 nm, 1 nm or a selectable 0.5 / 1 / 2 / 4 / 5 nm. PC software is part of the delivery, and results are exported over USB to Excel.
Which UV/Vis spectrophotometer?
Advanced — double beam, variable bandwidth, PMT, xenon
How the LEGEND measures and keeps results
The single beam models measure the blank and the sample one after the other in the same light path; the double beam models split the light into a sample beam and a reference beam, which are measured together, so lamp drift is compensated continuously. Methods are run from the 7″ colour screen, up to 1024 MB of results and calibration curves stay on the instrument, and the data go to a USB flash drive, to a PC over USB or RS232, and on to Excel.

Key characteristics
- Single and double beam spectrophotometer, six models on one platform: single beam K60, K61, K61S and double beam K80, K81, K81S, grating 1200 lines/mm
- Spectral bandwidth: 2 nm (K60, K80) · 1 nm (K61, K81) · 0.5 / 1 / 2 / 4 / 5 nm (K61S, K81S); 190–1100 nm
- Stray light ≤0.03 %T at 220 and 360 nm; wavelength accuracy ±0.3 nm (±0.1 nm at 656.1 nm)
- Photometric accuracy ±0.2 %T; range −0.3 to 3 A; stability ±0.0005 A/h (single) or ±0.0003 A/h (double beam)
- Photometry, quantitation, kinetics, multi-wavelength, DNA / protein and scanning up to 3000 nm/min
- 7″ colour screen, memory up to 1024 MB, USB and RS232 — PC software in standard delivery
Suitable for
- Quality control laboratories with routine UV/Vis methods and sample series
- Water, environmental and food laboratories: nitrate, phosphate, colour and other photometric tests
- Biochemistry: DNA and protein at 260/280 nm, enzyme kinetics
- Research laboratories that evaluate spectra and kinetics on a PC
- University and teaching laboratories
Why a UV/Vis spectrophotometer with PC software
Many laboratories measure on the instrument and evaluate on a PC — spectra, kinetics and calibration curves go into reports and laboratory systems. The LEGEND UV/Vis spectrophotometer with PC software has the software in the delivery, keeps results on the instrument and exports them over USB to Excel. The six models share the screen, the sample compartment and the accessories, so the model is chosen by optics and bandwidth: single beam for routine photometry and series, double beam for long kinetics and scans, 1 nm or selectable bandwidth when methods ask for it.
For an 11″ touch screen with Wi-Fi and GLP/GMP functions choose the MAVRICA-T, for very low stray light the NOVEL-800, for a xenon flash lamp the XENON — all in the menu above.
Cell holders and sample handling
A manual 4-cell holder (single beam models) or a single-position holder (double beam models) for 10 mm cuvettes, 4 glass cuvettes and 2 quartz cuvettes for UV are in standard delivery of the LEGEND. The sample compartment takes cuvettes with a path length of 5–100 mm. An automatic 8-cell holder, film holder, test-tube rack, Peltier / sipper system, integrating sphere and reflection accessory are available as options.
LEGEND UV/Vis spectrophotometer with PC software — technical specifications
Optics and photometry
| Optical system | K60, K61, K61S: single beam · K80, K81, K81S: double beam; grating 1200 lines/mm |
| Wavelength range | 190–1100 nm |
| Spectral bandwidth | K60, K80: 2 nm · K61, K81: 1 nm · K61S, K81S: 0.5 / 1 / 2 / 4 / 5 nm |
| Wavelength accuracy | ±0.3 nm (±0.1 nm at 656.1 nm) |
| Wavelength repeatability | ≤0.1 nm |
| Photometric accuracy | ±0.2 %T · ±0.002 A (0–0.5 A) · ±0.004 A (0.5–1 A) |
| Photometric repeatability | ≤0.15 %T · 0.001 A (0–0.5 A) · 0.002 A (0.5–1 A) |
| Photometric range | 0–200 %T; −0.3 to 3 A; 0–9999 C |
| Stray light | ≤0.03 %T at 220 and 360 nm |
| Stability at 500 nm | Single beam ±0.0005 A/h · double beam ±0.0003 A/h |
| Baseline flatness | K60, K80: ±0.002 A · other models: ±0.001 A |
| Noise | 0.0005 A at 500 nm |
Functions, data and general
| Measuring modes | T, A, C, E |
| Functions | Photometry, quantitation, kinetics, wavelength scan, multi-wavelength, DNA / protein |
| Scanning speed | High, medium, low · max. 3000 nm/min |
| Light source | Deuterium and tungsten lamp, plug-in sockets |
| Detector | Silicon photodiode |
| Cell holder | Single beam: manual 4-cell holder 10 mm · double beam: single-position holder 10 mm (standard) |
| Sample compartment | Cuvettes 5–100 mm |
| Display | 7″ colour screen |
| Memory | up to 1024 MB |
| Data output | USB flash drive, USB host, RS232; export to Excel |
| Software | PC software (standard) |
| Power supply | AC 110–220 V, 50–60 Hz |
Operation and data

Photometry, quantitation, kinetics, wavelength scan, multi-wavelength measurement and DNA / protein analysis are started from the 7″ colour screen. The wavelength is set automatically, and the scanning speed is high, medium or low, up to 3000 nm/min.
Results and calibration curves are stored on the instrument (up to 1024 MB) and exported to a USB flash drive or to a PC over USB or RS232. The PC software in the delivery takes the data on to Excel; 21 CFR compliant software and a built-in printer are available as options.
Standard delivery
- LEGEND UV/Vis spectrophotometer (K60, K61, K61S, K80, K81 or K81S)
- Manual 4-cell holder (single beam) or single-position holder (double beam), 10 mm
- 4 × glass cuvette and 2 × quartz cuvette for UV, 10 mm
- PC software, power cable and user manual
Optional: automatic 8-cell holder, film holder, test-tube rack, Peltier / sipper system, integrating sphere, reflection accessory, built-in printer and 21 CFR compliant software. The delivered configuration for a specific order is the one confirmed in the COLO.Science quotation.
Knowledge base
Spectral bandwidth, stray light, Beer–Lambert law and the choice of cuvettes are explained on COLO.Science — UV-Vis spectrophotometry and colour measurement, our knowledge base; how absorbance fits among other laboratory measurements is described in Measurement in laboratory science. The full data are in the LEGEND technical specification (PDF).
Selection guide
- Single or double beam with PC software: LEGEND UV/Vis spectrophotometer — six models, 2, 1 or 0.5–5 nm, 7″ colour screen.
- 11″ touch screen, Wi-Fi and GLP/GMP: MAVRICA-T — three double beam models.
- Very low stray light: NOVEL-800 — double beam, 2 nm.
- Xenon flash lamp without warm-up: XENON — double beam, 10.1″ touch screen.
- Photomultiplier detector: LEGEND-PMT — double beam, 190–900 nm.
Configuration notice
This page is provided for orientation and product selection. Cell holders, cuvettes, printer, software and other options are confirmed with the official COLO.Science quotation.
Sales and support for international customers
COLO Lab ExpertsPolje ob Sotli 4, SI-3255 Buče, Slovenia
Phone: +386 70 713 437 · Email: sales@colo.si · Web: colo.si
We supply laboratories across Europe directly and through partners. B2B prices are quoted net, excluding VAT.

















