... -1000nm 3.Wavelength Accuracy:2nm Repeatability:1nm 4.USB output 1200RS Visible SpectrophotometerModel Number:1200RSDynamic Range of 335 ... , factor and concentration value.Built-in RS232 digital output, with Specsoft application software based on Microsoft Windows, ... A, 1-9999 F, 0-9999 CData Output USB, digital output,Sample Holder 10mm-50mm adjustable, four positionDetectorSilicon PhotodiodeLight ...