Point/extractive sensors measure an analyte of interest at a given location by either placing the sensor at the location of interest or by conveying the analyte directly to the spectrometer for measurement. Various applications include health (e.g. breath analyzers) and environmental (e.g. greenhouse gas measurements) monitoring, with sensor transportability and robustness as key requirements for field deployability. An examples of a portable battery operated CO2 sensor developed in our lab is shown above, demonstrating real-time, highly sensitive (ppm-level) unattended CO2 measurements over days of deployment. Other sensors include a field-tested water-vapor isotope analyzer and transportable Faraday rotation spectrometer for NO monitoring in breath, blood and urine samples (deployed to Cleveland Clinic > 6 months for preliminary patient sample analyses). In addition to being highly-capable standalone sensors, these spectrometers may be coupled together to form sensor networks for spatial measurement of analytes (see below).
Projects:
- Applications
- Environmental Sensing
- Medical Diagnostics
- Combustion Diagnostics
- Sensing Configurations
- Remote Sensing
- Point/Extractive Sensors
- Sensor Networks
- Technologies
- Dual-comb spectroscopy
- Molecular Dispersion Spectroscopy
- Faraday Rotation Spectroscopy (FRS)
- Absorption-Based Spectrometers
- Mid-IR Laser Sources