Locations Protec has multiple calibration labs around the US. Please see our address information below and click on the map for driving instructions. DALLAS 1201 W Carrier Pkwy, Ste 101 Grand Prairie, TX 75050 CHICAGO 1501 Wright Blvd Chicago, IL 60193 HOUSTON 14251 Gulfstream Park Dr Webster, TX 77598 LOS ANGELES 2935 E Ricker Way Anaheim, CA 92806 DALLAS, TX Chicago, IL HOUSTON, TX Los Angeles, CA