Sunset Laboratory Inc. products

The Model-4 Semi-Continuous OC-EC  (Organic Carbon -Elemental Carbon) Field Analyzer features the latest advances in electronic and optical technology, and is rack mountable! This rugged and compact instrument offers sensitive and reliable field operation with an optimized oven and detector design. Its access panel allows for easy filter service and calibration. New safety mechanisms and inline pressure regulators offer superior flow control.

The Lab OC-EC Aerosol Analyzer is the industry standard for environmental and workplace monitoring. This instrument uses a proven thermal-optical method to analyze for OC-EC aerosols collected on quartz filters. It is the basis for NIOSH Method 5040 and is fully compliant with the IMPROVE protocol. It features a new and improved microcontroller and data acquisition system for enhanced accuracy and precision. There is no comparable instrument on the market today.In the Lab OC-EC Aerosol Analyzer, samples are thermally desorbed from the filter medium under an inert helium atmosphere followed by an oxidizing atmosphere using carefully controlled heating ramps. A flame ionization detector (FID) is used to monitor the analysis. Our proven low dead volume carrier gas control system and proprietary quartz oven design provide high sensitivity with ultra low carbon background and no oxygen contamination.

Our Parallel-plate Carbon Filter Denuders remove semi-volatile organic carbon vapors. Without Denuders, absorption artifacts will be present on a following quartz filter.

Our quartz filters are pre-fired  and then packaged in Petri dishes or cassettes, and are ready for sample collection. We offer 25mm, 37mm, or 47mm filters in Petri dishes. We also offer 37mm filters in three-piece plastic cassette samplers.