TES-135 Color Meter 1).Check the color difference between two samples 2).Tolerance function 3).Auto memory (99 sets) & RS-232 TES-135 Color Meter + Promoting Item & Free ShippingCheck the color difference between two samples. Color difference displayed Δ(L*,a*,b*) Δ(E*ab,C*ab, H*ab) Δ(Y, x, y) Δ(X, Y, Z) or Δ(Rs, Gs, Bs) Color space displayed (L*, a*, b*) (L*, C*ab, hab) (Y, x, y) (X, Y, Z) or ( ...