Lambda Advanced Technology
Products  UV-VIS  U2900
Ratio Beam Spectrophotometer


Conventional double beam UV Vis spectrophotometers available as a fully featured stand-alone unit with optional UV Solutions software, or as a PC based unit. The U2900 /2910 are well proven, robust Pharmacopoeia compliant UV Vis spectrophotometers using conventional deuterium and tungsten-iodine light sources. The systems are available with CFR21-compliant software and full IQ OQ documentation.

Stable optics due to double beam

In double beam design, the energy of the light source is divided into two with a half mirror so that one passes through the reference side, and the other through the sample side, which is unavailable with the single beam design. Since the reference-side energy is also incident on a detector, photometry is carried out on the basis of this signal. Therefore, an energy change in the light source can be compensated to ensure stable measurement for a long time.

Incorporation of stigmatic concave diffraction grating

The optics of this instrument adopts the Seya-Namioka monochromator widespread as a representative concavediffraction grating monochromator. Because a concave diffraction grating has both beam condensing and dispersing functions, an optical system canbe configured with fewer mirrors. In a spectrophotometer, use of fewer mirrors signifies a shorter optical path,thus giving rise to an aberration-free bright optics. For elimination of the aberrations which were essentially unavoidable in the past, a stigmatic concave diffractiongrating has been developed by applying Hitachi’s original technology. As a result, a higher resolution has been realized.

EASY OPERATION: Performing at a Higher Level! The operation of the U-5100 is very easy minimizing the operator training time.

A higher resolution has been achieved by eliminating coma from the Seya- Namioka monochromator which is the most popular concave diffraction grating monochromator. Its grooving is supported by the only ruling engine in Japan. The diffraction gratings of Model U-2900/2910 have also been made with this machine.

Simple to use

Buttons are laid out so as to follow the operating procedure. Hence, operations can be performed smoothly.

A rich variety of data processing functions

Spectrum can be expanded, contracted, smoothed, differentiated and integrated, and fundamental arithmetic calculations are applicable between spectra.

Powerful support for report generation

Measured data can be sent to Microsoft ? Excel?. One click of the Report button suffices for data transmission.

A spectrum can be pasted to another application program.

Print preview

Before printing, the contents can be checked by the Print Preview command.

Measured data text convertible

Besides conversion into the ASCII text or JCAMP format, spectra can be saved in Metafile format.

Optical system Double beam
Wavelength range 190 to 1,100 nm
Spectral bandpass 1.5 nm
Display color LCD with backlight (26.4 cm)
Printer I/F Centronics interface
Serial I/F RS-232C (exclusive for UV Solutions program)
Size (main unit)
U-2900: 500 (W) × 605 (D) × 283 (H) mm (with LCD lowered)
U-2910: 500 (W) × 605 (D) × 241 (H) mm (without PC and printer)
Weight (main unit) 31 kg, U-2910: 29 kg
Power supply 100, 115, 220, 230 or 240 V, 50/60 Hz
Power consumption 300 VA