Parameter	723(manual)	723(auto)	752(manual)	752(auto)	754(manual)	754(Auto)
Wavelength range	330-1000nm	330-1000nm	200-1000nm	200-1000nm	200-1000nm	200-1000nm
Spectrum belt width	4nm	2nm	4nm	4nm	2nm	2nm
Wavelength accuracy	±1nm	±0.5nm	±1nm	±0.5nm	±1nm	±0.5nm
Wavelength repeatability	0.5nm	0.5nm	0.5nm	0.5nm	0.5nm	0.5nm
luminosity range	0-125%T,-0.301-1.999A/0-3A,1-1999C/0-999C
luminosity accuracy	<±0.5%T	<±0.5%T	<±0.5%T	<±0.5%T	<±0.5%T	<±0.5%T
luminosity repeatability	0.3%T	0.3%T	0.3%T	0.3%T	0.3%T	0.3%T
Stray light	<0.3%T	<0.3%T	<0.3%T	<0.3%T	<0.3%T	<0.3%T

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.