On-spot GHG gas detector network for tunable-bandwidth and long-term deployment

Overview

This technology offers a simple, low-cost, and accurate greenhouse gas (GHG) detection solution based on microbolometer arrays with programmable micro/nano structures. By manipulating these structures, the device can detect light signatures across a discrete but wide spectrum range, enabling it to distinguish multiple gas species including carbon-based gases (CH4, CO, CO2), nitrogen-based gases (N2O, NO, NH3), and water vapor (H2O). The approach delivers inclusive and accurate GHG estimation suitable for diverse deployment environments.

Technical specifications

Core technology:

• Frequency-selective microbolometer that responds only to a narrow wavelength range without moving parts
• Microfabricated array of microbolometers, each tuned to slightly different wavelengths for broader spectral coverage
• Each microbolometer has a compact footprint of only 400×400 µm2, enabling easy array configuration
• Programmable micro/nano structure manipulation for tunable bandwidth

Detection capabilities:

• Covers spectrum range between 3.0 and 5.0 µm
• Detects major GHG gases: CH4, CO, CO2, N2O, NO, NH3, and H2O
• Preliminary validation with an array of 9 microbolometers detecting gases at 1,000 ppm concentration

System integration roadmap:

• Development of more than 6 microbolometers precisely tuned to each target GHG wavelength
• Integration with electronics, wireless communication units, off-the-shelf temperature and humidity sensors, and battery power
• Water-proof packaging for field deployment
• On-site validation in Nebraska for sensitivity, selectivity, periodic wake-up, and lifetime

Technology readiness level

The concept has been validated through preliminary results showing that an array of 9 microbolometers successfully responded to a spectrum range between 3.0 and 5.0 µm, covering major GHG gases at 1,000 ppm. The team has prior experience deploying battery-powered sensor systems for in-soil measurement in actual sorghum farms in Nebraska. The current development plan targets prototype completion and field validation, positioning the technology toward a deployable, long-term GHG monitoring network.