Established in 1946, Bach-Simpson is a leading supplier of electronic instrumentation and control systems for the rail and transit markets. Known for our quality and reliability, Bach-Simpson offers state-of-the-art products tailored to our customer's needs. ISO 9001-2000 design procedures and CMM Level II software development result in products of exceptional performance and reliability. Our headquarters in London, Ontario, Canada incorporates the design, manufacturing and service groups in one facility.