Shop Westlock at BPS Supply Group. Our online selection includes valve position monitors, control switches, positioners and more. Westlock is a trusted brand known for its innovative and high-quality products in the field of industrial process control. Their top-selling products include robust and reliable valve position monitors, control switches, and positioners, which are essential components in various industrial applications. These products are used to ensure precision and safety in controlling fluid and gas flow, making Westlock a unique and dependable choice for customers seeking dependable solutions in industrial automation and process control.