About US

Company History

Sunset Laboratory Inc. was founded in 1984, and is a pioneer in the field of organic carbon and elemental carbon (OC-EC) aerosol analysis.

The thermal-optical technique developed by Sunset Lab’s founder was adopted as the analytic method for OC-EC measurements by the National Institute for Occupational Safety and Health (known as NIOSH Method 5040). In recognition of this achievement Sunset Lab’s founder received the 1996 Alice Hamilton Award as a co-author of this method.

The sample sources Sunset Laboratory analyzes by this method are collected in a variety of environments for multiple purposes. Sources range from ambient urban and rural areas to mining sites, work environments, national parklands, forest fire plumes, and sites of other unusual events. Samples are taken for environmental applications such as EPA monitoring programs for visibility and particle loading. We have become experts at analyzing workplace exposure assessments.

In the early 1990s, Sunset Laboratory began to make commercially available thermal-optical OC-EC lab instruments, the Lab OCEC Aerosol Analyzer. We sell these instruments worldwide, with a combined analysis base of well over 250,000 filter samples.

In 2000, we developed the Model-4 Semi-Continuous OC/EC Field Analyzer, a semi-continuous OC-EC analyzer for near real-time, in-situ measurement of carbon aerosol. The time-resolution capability and laser-based pyrolysis correction techniques of this instrument provide refined information about particle origins, health exposures, and changes in air quality.

Our instruments have become the premiere analytic equipment used for OC-EC on six continents and more than 40 countries, and are ready for use with the NIOSH Method 5040 protocol, IMPROVE network protocols, and the EUSAAR 2 protocol. Highly configurable operating parameters also allow for custom protocol for other types of analysis.