Seedlabs

One-Probe Combustion Temperature & Species Monitor

A single sensor probe that measures both temperature and gas types inside industrial furnaces.

A single quartz-tuning-fork optical head that simultaneously reads absolute gas temperature (from two absorption lines) and species concentration inside combustors, furnaces, and boiler flues — no calibration, no separate thermocouple arrays or sampling systems.

ChemistrySpectroscopy and Laser Applications
Urban Stormwater and Fluid ManagementGas turbine and industrial furnace combustion tuning and control

Concept

A ruggedized probe version of the calibration-free LITES sensor that targets two absorption lines of a combustion-relevant molecule (e.g., H2O or CO2) with a single QTF, retrieving local gas temperature from the line-pair ratio and absolute species concentration from the line shapes at the same time. Because both outputs are absolute and calibration-free, the probe can sit at the exit of — or inside — a combustor for months without recalibration, feeding combustion-control loops that trade NOx against fuel efficiency. The wedge is two-line thermometry in one miniature, wavelength-independent head, replacing the paired sampling analyzers plus thermocouples that drift and cannot be recalibrated in place.

Why now

The new paper reports, for the first time in LITES, simultaneous inversion of two gas absorption lines with a single QTF to retrieve temperature, alongside calibration-free absolute concentration inversion — and experimentally verified accuracy under changes in laser power, QTF characteristics, and the optical path. The stated small size and wavelength independence suit the mid-infrared bands where H2O and CO2 combustion lines are strong. Together this moves two-line optical thermometry from lab setups requiring careful calibration toward a deployable, maintenance-free combustion probe. Readiness caveat: the demonstrated configuration is a lab-scale single-gas measurement; a combustor product requires hot-environment packaging and validation at realistic flue conditions.

Written by GLM · 11 Oct 2026

AI assessment

Backed by 1 paper83

A high-value industrial probe that leverages a calibration-free LITES breakthrough to provide simultaneous temperature and species monitoring in harsh combustion environments.

Evidence strength
4/5
The research explicitly demonstrates the first-time simultaneous inversion of two absorption lines for temperature and concentration using a single QTF, providing a strong theoretical and lab-scale basis.
Market pull
5/5
Industrial combustion tuning (NOx vs. efficiency) is a high-stakes operational challenge for the named OEMs and utilities, where drift-free sensing provides immediate ROI.
Novelty & moat
3/5
While it builds on the 'Zero-Cal In-Situ Stack Gas Analyzer' idea, it adds a critical second dimension (temperature) via two-line thermometry, moving from a simple analyzer to a combustion control tool.
Feasibility
3/5
The core sensing mechanism is proven in the lab, but translating a quartz-tuning-fork head to survive the extreme heat and vibration of a live combustor is a significant engineering hurdle.
Wedge clarity
5/5
The wedge is highly specific: replacing paired sampling analyzers and thermocouples with a single, calibration-free two-line thermometry probe.
Simplicity / focus
5/5
The idea focuses on one sharp product—a ruggedized probe—rather than an expansive software platform or a suite of unrelated sensors.

Scored by Gemma 4 · 11 Oct 2026. Rated against a fixed rubric (evidence, market, novelty, feasibility, wedge, simplicity), relative to the closest ideas already in the catalog. A prior estimate to compare ideas before real-world signal arrives.

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Who benefits

  • GE Vernovacompany

    Gas turbine OEM; a drift-free, calibration-free temperature-plus-species probe enables tighter combustion control and NOx/efficiency optimization across its installed fleet.

  • Siemens Energycompany

    Designs and services gas turbines; absolute, recalibration-free in-situ readings reduce sensor maintenance in hot sections and support hydrogen-co-firing trials where flame temperature control is critical.

  • John Zink Hamworthy Combustioncompany

    Industrial burner supplier; simultaneous temperature and concentration from one probe simplifies burner commissioning and tuning at customer furnaces.

  • DLR (German Aerospace Center)organization

    Runs major combustion-diagnostic research programs; a calibration-free two-line probe provides reference-grade temperature and species data without per-campaign calibration effort.

  • Veoliacompany

    Operates hundreds of CHP and industrial combustion plants; a maintenance-free probe supports continuous optimization of fuel use and emissions.

Research it builds on

  1. Calibration-free measurement of absolute gas concentration and temperature via light-induced thermoelastic spectroscopy
    Shunda Qiao, Ziting Lang, Ying He et al. · 2025 · 131 citations
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feasibility