Performance parameter	721	722
Wavelength range	340-1000nm	325-1000nm
Wavelength accuracy	±2nm	±2nm
Wavelength repeatability	1nm	1nm
Spectrum belt width	4nm	4nm
Luminosity accuracy	≤±0.5%T	≤±0.5%T
luminosity repeatability	0.5%T	0.3%T
stray light	≤0.5%T	≤0.5%T
Displayer	31/2LCD	31/2LCD
Operation	Manual wavelength	Manual wavelength

Tianjin Jewel Electronic Instrument Co.,Ltd is established in 1995, was a high-tech enterprise specialized in design and producing instrument.
Company located in Tianjin High-tech Huayuan Industry Zone, more than 2000 square meters workshops and products R&D office.
All of our products are made and assembled by ourselves, from the beginning of the company till now, we've invented and achieved many product patents, besides, because of our products with perfect quality and very competitive prices, we also awarded with very good reputation by users from home and abroad.