History

The Transition from Exhaust Emissions Testing to "Clean" and "Dirty" Screening

Since its inception more than 25 years ago, the Inspection and Maintenance industry has changed significantly - from total fleet exhaust emissions testing of the early 1980s to today's convenient, economical screening approaches.

Remote sensing is generally used for enforcement and monitoring purposes. There are two enforcement applications: Clean Screening (CS) and Gross Emitter Identification (GEI). The monitoring application, recognized by the USEPA as potentially the most powerful one, is generally referred to as I/M Program Evaluation (PE). All these applications are effective on-road supplements to traditional I/M programs.

ESP has played a critical part in the industry's transition, contributing significantly to I/M advances. The figure below shows an evolutionary timeline of U.S. remote sensing legislation overlaid with ESP's AccuScanâ„¢ technology milestones.

History of Remote Sensing in the USA