The TU-1800/1800S is our company's popular UV-VIS spectrophotometer. Its optical system adopts a split-beam measurement optical system, detector for two highly sensitive silicon photodiodes; instrument operations are controlled through an internal single-chip microcomputer, matched with a 320*240 LCD display screen, and a soft-touch keypad and parallel printing interface: instrument features an 8-cell holder, accessible light-source chamber. TU-1800/1800S UV-VIS spectrophotometer performs photometric measurements, spectrum measurements, and quantitative measurements. It is easily operated, features excellent performance, automatic 1100nm-200nm wavelength scan, peak-picking, and automatic baseline check. Its convenient and easy data processing is very suitable for medical, chemical, environmental, agricultural, or biological analytical work.

* Low Stray Light and Wide photometric range. The high-performance blazed holographic grating reduces stray light of the instrument and widens the photometric range. * Enhanced baseline stability. The dual beam monitoring ratio system enhances baseline stability. * Heightened resolution. The large-diameter light path magnifies the instrument\'s energy, reduces noise and enhances resolution. * Automatic sequential measurement. The automatic eight-cell sample holder carries out automatic measurement of eight samples in succession. It also features a one-touch measurement of the dissolution of six drug samples and a blank * User-friendly light source. The socket deuterium lamp and socket tungsten lamp facilitates easy light source replacement, easy maintenance, and reduces operation error.

Specifications

Optical System: X-shaped monochromator, with high-resolution, diffraction holographic grating.
Wavelength range	200nm ~ 1100nm
Spectral bandwidth	0.5nm, 1.0 nm, 2.0 nm and 5.0 (for TU-1800S)
	2.0 nm (for TU-1800)
Stray light	0.3 %T (220nm NaI)
Wavelength accuracy	+/-0.5 nm (automatic correction)
Wavelength reproducibility	0.2nm

Photometric system: dual beam ratio monitoring system
Photometric method	Transmittance, absorbance, energy and concentration.
Photometric range	-0.3~3.0 Abs
Photometric accuracy	+/-0.3%T (0~100%T), +/-0.002 Abs (0~0.5 Abs), +/-0.004 Abs (0.5~1.0 Abs)
Photometric reproducibility	0.15 %T (0~100 %T), 0.001 Abs (0~0.5 Abs), 0.002 Abs (0.5~1.0 Abs)
Baseline flatness	+/-0.004 Abs (200nm~1100nm)
Baseline stability	0.002 Abs/h (500nm, after preheating)

Software: single chip system.?/FONT>
Photometric measurement	measuring current wavelength transmittance or absorbance, with the capacity to make coefficient calculations according to set formula.
Spectrum scanning	carrying out scanning of transmittance or absorbance of specified wavelengths together with peak value checkout.
Quantitative determination	setup of standard curves and direct measurement of sample concentration.
Kinetic Measurements	Time scanning of transmittance or absorbance on 1 to 10 specified wavelengths and handling data such as peak value checkout, spectral microanalysis and spectral calculation.
Result delivery	printout of analytical data by using the EPSON LQ series computers (to be selected at your discretion)./STRONG>

Mainframe: A compact spectrophotometer
Light Source	Socket deuterium lamp and socket tungsten lamp
Detector	A pair of silicon photodiode
Sample Chamber SPAN style=\"mso-spacerun: yes\">	Eight-cell sample holder
Display	LCD (320 X 240 dot matrix)
Keyboard	membrane soft-touch keypad
Printer interface	a parallel printing interface (ESC/P command and EPSON-LQ compatible)
Dimensions	540mm X 400mm X 250mm
Weight	25kg

Other Requirements:
Power Source	voltage 110-230V, frequency 50-60Hz alternating current

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Note: The TU-1800 features all the advanced functions of the TU-1800S, but is simplified by removing the selectable bandwidth feature. The TU-1800 will remain at 2.0 nm set spectral bandwidth while the TU-1800S can analyze using four different bandwidths