... used for calculating concentrations.Auto 0%(T)and 100%(T)function.Direct-reading concentration by ... Spectrophotometer Performance SpecificationSpectral Bandwidth 5nmMonochromatorSingle beam, C-T type, grating 1200L/mmWavelength Range 335nm - ... .5%T(360nm)Photometric Accuracy ±1.0%TPhotometric Repeatability0.5%TStability ±0.004A/h, at 500nmT- ... (at 0.5 A,≤±0.004A (at 1.0 A)Photometric Range: 0-199.9% T, ...