LS Instruments offer service "RheoLab"

The DWS RheoLab is an optical rheometer that measures a sample's viscoelastic behavior across an exceptionally broad frequency range while examining its texture and microstructure, using only small sample volumes. Because measurements are contact-free and non-destructive, sealed sample cells enable long-term stability and shelf-life studies of delicate, highly viscoelastic microstructures. Built on DWS microrheology, it suits a wide variety of materials, including polymers, microgels, protein solutions, emulsions, particle suspensions, dairy, and cosmetic products.