Double Beam UV-VIS Spectrophotometer - TTUVvis Series

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Double Beam Visible Ultra Violet Spectrophotometer - TTUVvis Series

Spectrophotometry is the quantitative measurement of the reflection or transmission properties of a material as a function of wavelength that deals with visible light, near-ultraviolet, and near-infrared. Spectrophotometers can measure a light beam's intensity as a function of its color (wavelength). Important features of spectrophotometers are spectral bandwidth (the range of colors it can transmit through the test sample), the percentage of sample-transmission and the logarithmic range of sample-absorption.

Torontech’s UV-Vis spectrophotometers are used in the UV and visible regions of the spectrum working on the principle of absorption spectroscopy or reflectance spectroscopy in the ultraviolet-visible spectral region. This means it uses light in the visible and adjacent ranges. The absorption or reflectance in the visible range directly affects the perceived color of the chemicals involved. In this region of the electromagnetic spectrum, atoms and molecules undergo electronic transitions.

Absorption spectroscopy is complementary to fluorescence spectroscopy, in that fluorescence deals with transitions from the excited state to the ground state, while absorption measures transitions from the ground state to the excited state

There are two major classes of devices: single beam and double beam. A single-beam spectrophotometer measures the relative light intensity of the beam before and after a test sample is inserted. A double beam spectrophotometer compares the light intensity between two light paths, one path containing a reference sample and the other the test sample.

Samples for UV/Vis spectrophotometry are most often liquids, although the absorbance of gases and even of solids can also be measured. Samples are typically placed in a transparent cell, known as a cuvette.


The use of spectrophotometers spans various scientific fields, such as physics, materials science, chemistry, biochemistry, and molecular biology. They are widely used in many industries including semiconductors, laser and optical manufacturing, printing and forensic examination, and as well in laboratories for the study of chemical substances.

UV/Vis spectroscopy is routinely used in analytical chemistry for the quantitative determination of different analytes, such as transition metal ions, highly conjugated organic compounds, and biological macromolecules. Spectroscopic analysis is commonly carried out in solutions but solids and gases may also be studied.

Torontech’s TTUVVisDBI Double Beam UV-Vis spectrophotometer comes with high quality grating, reduces stray light level, and improves test accuracy & linear range. Wavelength calibration is executed by deuterium lamp, mercury lamp, HO2O3 solution provides excellent wavelength accuracy. Design of TFT color screen and water-proof keyboard adds to unique features of TTVUVVisDBI.


ToronUVVisDBI Spectrophotometer is a Double-beam Visible Ultra-violet with a range 190-1100nm wavelength designed to accomplish ultra-low stray light of ≤0.03%. Having 0.5nm optical resolution with 4 options of spectral bandwidth - 0.5/1/2/4 nm and with built-in bio-analytical methods and option of versatile test solutions.

7” TFT color screen WVGA (800X480), water-proof keyboard design and further capabilities of connection to PC via USB and LAN for data storage & printing. Extended functions including scanning of spectrum scanning, monitor kinetic curve, hohtometric measuring, quantitative analysis and measure unknown sample. Controllable by ToronSoftUVvis software


Torontech’s GLP/GMP regulatory compliant software ToronSoftUVvis for ToronUVVisDBI Double-beam Visible Ultra-violet Spectrophotometer ensures the data authenticity & standardisation by build-in user account access control, audit trail and encrypted data saving algorithm.

ToronSoftUVvis adopts intuitive RIBBON style interface design. With the help of build-in measuring mode, ToronUVvisDBI can easily meet the need from basic measurement to sophisticated research analysis. By dividing the measuring process into “3-Steps” user can easily accomplish the process from method edition, measuring operation and results reporting.

ToronSoftUVvis’s report editor is powerful and flexible, you can input related data in right position based on requirements. The report can be saved as template for future usage. ToronUVVisDBI includes all your needs for spectrum scanning, kinetic testing, photometric measuring and quantitative analysis. With robust data processing function such as interpolation method, grand average, arithmetic and data set, ToronSoftUVvis satisfies the most sophisticated application requirements.

Technical Parameters



Light Path:

Double Beam

Wavelength Range (nm):


Spectral Bandwidth (nm):


Optical resolution


Photometric Range (Abs): 

- 3.5~3.5

Baseline Flatness (Abs):



Torontech provides wide range of accessories for the user to accomplish various testing needs:

  • Automatic 8-cell holder: Enables automatic switching and measuring of eight 10mm square cuvettes
  • Solid sample holder: Used for transmittance/absorbance measurement of a solid sheet sample of 80 mm x 40 mm x 20 mm
  • Rectangular long-path cell holder: Holds two long path cells (light path 5-100mm)
  • Diverse types of cuvettes: Diverse Quartz and Glass cuvettes with different light path and volume
  • Absolute reflectance attachment: Used for testing materials with optical surface, or semi-conductive materials. 5° incident angle can reduce the polarized light to the least. Maximum sample size: 100L x 160W x 15H mm

Torontech Group International

Phone: +1 416 368 2721
Fax: +1 416 981 7652
E-mail: Sales dept:
Customer service:
Address: 7030 Woodbine Ave., Suite #500, Markham, ON L3R 6G2, Canada