Sierra Research | Customized Test Systems

Sierra Research has designed and constructed specialized systems for testing emissions and air pollution for a variety of clients. Example systems include an IM240-type analyzer matched to an RG240-type dynamometer for the State of Vermont, an audit gas verification test system for the State of New Jersey, and an IM240 analyzer and dynamometer for the State of Alaska customized to be able to operate down to minus 50 degrees F. Sierra also has experience in instrumenting vehicles to collect on-road emissions and driving pattern data. Examples of these test systems can be seen in the pictures below.

Please contact Sierra with your needs and we will work with you to develop a customized and cost-effective solution.

Vermont IM240 Test System

IM240 Analyzer (manufactured by Horiba, modified by Sierra) – System was highly modified to no longer use a critical flow venturi for measuring flow, due to power limitations at the facility where the system was installed.

RG240 Dynamometer (manufactured by Maha, integrated by Sierra) – An eddy current dynamometer was used due to power limitations at the test facility where the system was installed, which prohibited the use of an AC electric full inertia simulation dynamometer.

Alaska Test System

Alaska cold temperature IM240 system control system. The system was installed in a van so it would be portable for use in parking lots.

An example vehicle on the dynamometer during testing at low temperature in Fairbanks, Alaska using a Sierra developed test system.

Rear view of vehicle being tested at low temperature on a test system designed by Sierra. Dynamometer motor has a cover over it (on the right of the picture next to the vehicle) to keep it in a heated space during testing.

New Jersey Gas Verification System

New Jersey audit gas calibration system. This system was designed by Sierra so that any staff could be trained to use the system in as short as 15 minutes. The system is used to verify the concentrations in audit gases before they are used to audit vehicle inspection test systems throughout New Jersey.