Sunset Laboratory is proud to introduce its latest semi-continuous, real-time carbon aerosol analysis instrument. Initial design and performance validation is based on a previously described prototype built by Sunset Laboratory in the early 1980's as well as the first generation production models operating at EPA Supersites around the country. Developed under an SBIR grant from the EPA, these instruments are the only true field deployable OCEC analyzers on the market today.
The newest entry in our line of OCEC analyzers incorporates the latest in electronic and optical developments along with an optimized oven and detector design for sensitive, reliable field operation.
A new continuous-flow non-dispersive infrared (NDIR) detector system allows this third generation field instrument to be operated using only two support gases (OpticalEC/TC mode). Gas consumption is dramatically reduced by computer controlled mass flow controllers. Gases are only consumed during the analysis modes and conserved during sampling. The temperature stabilized NDIR system has its own RISC processor for enhanced sensitivity, linearity and long term stability. Reduced analysis times maximize on-line sample collection times. The enhanced time-resolution capability of this new instrument is possible by a rapid thermal TC measurement and a laser-based absorbance technique to measure EC.
Features of the field instrument include:
- Optimized detector and optical system for maximum sensitivity
- Customized sampling time to satisfy a wide range of experimental programs
- Minimum quantifiable levels of 0.5 µg/M3 each of OC and EC(30 minute sample)
- Custom 16-Bit data system with embedded CPU instrument controller
- Sturdy carrying / shipping case for reliable field deployment
- Only three support gases for operation
*Instrument configurations can also be modified to include an FID. Results may then be made comparable to NIOSH Method 5040.
The time resolution capacity of this instrument will give researchers greater power to study critical issues of particle origins and health exposures – such as the measurements of exposure; the relationships between exposure to specific particle matter characteristics; identification of the causal agents; and mechanisms for the associated health effects.