... printing industries.•Display direc tly color difference by E*ab, L*a*b, CIE_L*a*b, CIE_L* ... tware with USB expansioninterface.--------------------------------------------------------------------------------SpecificationsModel SC20Accuracy <0.2 ΔE*abTest range L: 0~100, a: -128~127, b: ... -128~127Display Δ E*ab, CIE_Lab, ΔLab, CIE_LchSensor Silicon photodiode arrayAperture ...