CO₂ Sensors / Thermal Conductivity CO₂ Sensors / Manufacturer Research Audit
Thermal Conductivity CO₂ — Manufacturer Research Audit
Research date: 13 October 2026 · Scope: All 16 manufacturers listed under AirAlign’s Sensor Manufacturers directory at audit time.
This is a model-based evidence log, not an assertion that every global OEM variant has been exhaustively checked. It records the source reviewed, matching technology found, and remaining uncertainty for each company.
Reading the status: Verified sensor means a manufacturer documents a CO₂ thermal-conductivity sensor; Verified module means a board or module employing that technology; Verified analyzer means a distinct industrial system; Not verified means no matching CO₂ thermal-conductivity product was established from the reviewed material. Not verified does not mean the manufacturer definitely makes none.
Manufacturer-by-Manufacturer Findings
| Manufacturer | Outcome | Review Notes | Reference |
|---|---|---|---|
| Senseair | Not verified | NDIR CO₂ modules (e.g., S12/S8); no thermal-conductivity CO₂ model confirmed in reviewed product pages. | Official source → |
| Sensirion | Verified sensor | Verified STCC4, STC31-C and legacy STC31 gas concentration ICs. | Official source → |
| Figaro Engineering | Not verified | Reviewed CDM7160/7162 infrared CO₂ series; no thermal-conductivity CO₂ model confirmed. | Official source → |
| Winsen | Not verified | Reviewed MH-series CO₂ infrared modules; thermal-conductivity CO₂ model not confirmed. | Official source → |
| Telaire / Amphenol | Not verified | Reviewed T6713 NDIR CO₂ modules and the CO₂ incubator technology overview; no Telaire thermal-conductivity CO₂ model confirmed. T3400 TC product targets A2L refrigerants, not CO₂. | Official source → |
| SST Sensing | Not verified | Reviewed CozIR, ExplorIR and SprintIR official CO₂ datasheets (NDIR); no TC CO₂ model confirmed. | Official source → |
| Cubic | Not verified | Reviewed manufacturer CO₂ product category and existing CM modules; no TC CO₂ product confirmed. | Official source → |
| Murata | Not verified | Manufacturer identifies IMG series as NDIR CO₂; no TC CO₂ model confirmed. | Official source → |
| ELT Sensor | Not verified | Reviewed CO₂ module classification and D-400 product; NDIR; no TC CO₂ model confirmed. | Official source → |
| Honeywell | Verified analyzer | Verified 7866 industrial thermal-conductivity analyzer for CO₂-in-air and H₂-in-CO₂ applications. Not an OEM sensor chip; excluded from direct sensor module comparison. | Official source → |
| SGX Sensortech | Not verified | Reviewed INIR2-CD5/CD100 carbon dioxide infrared sensors; no TC CO₂ model confirmed. | Official source → |
| Alphasense | Not verified | Reviewed IRC-A1 and IRC-AT CO₂ NDIR families; no TC CO₂ model confirmed. | Official source → |
| smartGAS | Not verified | Manufacturer CO₂ portfolio identifies BASIC EVO/FLOW EVO explicitly as NDIR; no TC CO₂ model confirmed. | Official source → |
| Dynament | Not verified | Official Platinum Series CO₂ products documented as NDIR; no TC CO₂ model confirmed. | Official source → |
| Infineon Technologies | Not verified | Reviewed manufacturer gas sensor catalog; no independently identified thermal-conductivity CO₂ measuring module. | Official source → |
| DFRobot | Verified module | Verified Gravity STCC4 SEN0678 integration board using Sensirion STCC4 and an additional SHT40 RH/T element; DFRobot does not manufacture the sensing die. | Official source → |
How AirAlign Includes Products
- Confirm that CO₂ is the measured target gas, not a refrigerant or unrelated gas.
- Confirm thermal conductivity as the primary measurement principle for the specific model.
- Check the original manufacturer datasheet for range, accuracy, communications and gas mixture assumptions.
- Distinguish OEM sensing ICs, evaluation modules and industrial analyzers; never treat them as equivalent.
- Check for existing AirAlign entries and lifecycle status before publishing.
- Revisit Not verified items when new primary documentation, specific model numbers or revised catalogs appear.
Included Verified Products
- Sensirion STCC4 — IAQ-range CO₂ sensor
- Sensirion STC31-C — high-range CO₂ sensor
- Sensirion STC31 — legacy high-range CO₂ sensor
- DFRobot Gravity STCC4 — module incorporating Sensirion sensing IC
- Honeywell 7866 — related industrial analyzer (separate product class)
This research log reflects publicly accessible manufacturer information reviewed on the date shown; technical specifications, model lifecycles and product lineups can change.