Cheap 721 vis spectrophotometer 

Features:
1.Low price
2.a simple single beam spectrophotometer.
3. The wavelength is set manually.
4.Direct readout of transmission or absorption on the LED display.
5.Data can be transferred to PC via RS232 port.
6.ideal tool for education or routine analysis

Specification:

Optical System?Single Beam, Grating 1200 lines/mm
Wavelength Range? 340?1020 nm
Spectral Bandwidth? 6nm
Wavelength Accuracy? ±3 nm
Wavelength Repeatability?1nm
Photometric Accuracy: ±1%T
Photometric Repeatability? 0.5%T
Photometric Range? 0-200%T, -0.3A~3A
Stray light? 0.5%T
Stability? 0.004 A
Baseline Flatness? ±0.002A
Noise? ±0.001 A
Wavelength Setting? Manual
Work Mode: T, A, C
Light Source : Imported Philip Tungsten lamp
Display: 4 LCD
Output: RS-232 port/Print port(op?onal)
Power: AC 220V/50Hz or AC 110V/60Hz
Shipping Size/GW: 520*450*320mm/10kg