Indoor Air Quality Ozone Monitor
We are in the process of developing a portable IAQ Ozone Monitor to address the needs of indoor air quality measurements. The goal is to produce an ozone monitor based on UV absorbance that is free from interferences often found in indoor air while being priced at the same level as currently available Heated Metal Oxide Semiconductor (HMOS) ozone sensors which suffer from many interferences and long-term drift. A new product, the UV-IAQ-100 Ozone Monitor is expected to be introduced in the spring of 2016. The instrument features the use of fans in place of air pumps to make the instrument nearly silent for use indoors and a patent-pending heated graphite ozone scrubber to greatly reduce interferences from Hg and UV-absorbing VOCs found indoors.
Black Carbon Photometer
We are in the process of developing a long-path, direct-absorbance instrument for measuring total extinction of aerosols at multiple wavelengths in the visible and near IR. In combination with a miniature integrating nephelometer to quantify the scattering component of extinction, this instrument will be capable of measuring total particle absorbance by difference. Our goal is to develop a portable instrument that can replace Aethalometers, which rely on collection of particle on filters. Of course, an important application is field measurements of the fundamental radiative properties of aerosols.
In a Phase I SBIR grant funded by the National Institute for Environmental Health Sciences (NIEHS) of the National Institutes of Health (NIH), students at 50 schools throughout the U.S. were provided with Personal Ozone Monitors and microAeth personal black carbon monitors. Students at those schools planned and carried out personal exposure monitoring treks. The data are uploaded to a database and displayed on Google Earth embedded in blogs where students discuss their results. You can see the student air pollution monitoring treks here. The Phase II project was recently funded, and we are in the process of developing new hand-held instruments for air pollution measurements with the ability to upload data to a database and display those data in real time on multiple smart phones.
Personal Monitors for CO2 and PM2.5
As part of the NIH-funded GO3 Treks project, we are developing personal monitors similar to the POM (Personal Ozone Monitor) for CO2 and for particulate matter. The CO2 personal monitor will be based on non dispersive infrared absorbance (NDIR), and the PM2.5 personal monitor will be based on optical scattering from particles. A Personal Air Monitor is being developed with the capability of accepted a wide range of sensors manufactured by other companies, thus expanding the capability to measure such species as CO and NO2 and others. Although these instruments are being developed for use in the GO3 Treks project, they may be used in any application where personal monitoring of these species is desired.