Automatic Filter Changer Improves Testing Efficiency and Testing Safety for Engine and Vehicle Testing

Lansing, MI – October 23, 2009 – Sierra’s Automatic Filter Changer is a compact and portable safety and automation tool that should be a part of every emissions test cell.

The Automatic Filter Changer allows the engineer to stay out of the test cell during testing as several tests are done in succession. Our automatic filter changer works seamlessly with the Model BG®-3 particulate partial flow sampling system to fully automate particulate collection to greatly improve testing efficiency and more importantly, testing safety. The system can hold up to 22 (dependent on filter size, 47mm, 70mm, or 90mm) single or double filter cartridges. Sierra will customize the filter changer for 47mm, 70mm or 90mm applications. For example, Sierra has designed the changer to work interchangeably with both 47mm and 70mm.

The system meets all Federal Register requirements and has proven through extensive test at Caterpillar over a 6 month period to be the most rugged and reliable automatic filter changer on the market.

For complete technical information on Sierra’s Automatic Filter Changer visit http://sierrainstruments.com/emissions/filter.html or call 800-866-0200 and speak to one of Sierra’s flow experts.

About Sierra Instruments Emissions Systems:

• Sierra Emissions Systems is a wholly owned subsidiary of Sierra Instruments, Inc.
• Sierra Instruments, Inc. is well known as " The Mass Flow Company " and manufactures high-performance mass flow meters and controllers for use in numerous industries and applications throughout the world.
• In 1990, Sierra received the exclusive worldwide license for Caterpillar’s patented micro-dilution technology.
• Sierra's knowledge of mass flow measurement and control, a key to partial flow sampling, and Caterpillar’s vast engine development and emissions testing knowledge formed a formidable technology partnership.
• For well over a decade, this technology partnership has yielded a line of world-class partial flow sampling systems: The Model BG®-1, Model BG®-2, and now the very versatile Model BG®-3 provides accurate, repeatable Engine Particulate Matter (PM) emissions measurements for transient and steady-state test cycles for engine and vehicle testing.

Learn more about Sierra Instruments Emissions Systems at www.sierraemissions.com.