Greenhouse Gas Monitoring Instrument
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| Brand | LINGXI Optoelectronics |
|---|---|
| Model | LXEC-210 |
| Measurement Principle | Non-Dispersive Infrared (NDIR) Spectroscopy |
| Target Gases | CO₂, H₂O |
| Origin | Zhejiang, China |
| Gas Detection Configuration | Open-path, in-situ |
| Power Consumption | Low-power design, no pump required |
| Compliance Context | Designed for field-deployable eddy covariance (EC) flux measurements per AmeriFlux/ICOS protocols |
| Sample Interface | Direct atmospheric sampling, no inlet tubing or sample cell |
| Brand | LINGXI Optoelectronics |
|---|---|
| Origin | Zhejiang, China |
| Model | LXEC-210C |
| Measurement Principle | Non-Dispersive Infrared (NDIR) Spectroscopy |
| Measured Gases | CO₂ and H₂O |
| Gas Path Configuration | Closed-Path |
| Compliance Context | Designed for long-term eddy covariance flux measurements per AmeriFlux/ICOS protocols |
| Data Integrity Features | Automated zero calibration, temperature-stabilized optical bench, high-frequency sampling (up to 20 Hz) |
| Environmental Robustness | IP65-rated enclosure, -25 °C to +50 °C operating range, condensation-resistant sample line heating |
| Brand | Picarro |
|---|---|
| Origin | USA |
| Model | G2203 |
| Detection Principle | Cavity Ring-Down Spectroscopy (CRDS) |
| Target Gases | Methane (CH₄) and Acetylene (C₂H₂) |
| Measurement Sensitivity | Sub-ppb |
| Response Time | <2 seconds |
| CH₄ Precision (2-s) | 3 ppb |
| C₂H₂ Precision (2-s) | <0.6 ppb |
| CH₄ Drift (8-h, STP) | <4 ppb |
| C₂H₂ Drift (8-h, STP) | <1.5 ppb |
| Environmental Stability | Engineered for minimal thermal drift across −10 °C to +45 °C operating range |
| Brand | Vaisala |
|---|---|
| Origin | Finland |
| Model | MHT410 |
| Measurement Principle | Cavity Ring-Down Spectroscopy (CRDS) |
| Gas Targets | Dissolved Hydrogen (H₂) and Water Activity (a<sub>w</sub>) in Transformer Oil |
| Oil Compatibility | Mineral oil, natural ester, synthetic ester, silicone oil |
| Enclosure Rating | IP66 with rain shield |
| Warranty | 5 years |
| Output Interfaces | 3× isolated 4–20 mA, RS-485 (Modbus RTU, DNP3, ASCII) |
| Compliance | EN 61326-1, CISPR 32/EN 55032 Class B, ISO 6270-1:2017 (C5-M), ISO 9227:2017 (salt spray), ISO 12994-6 (C5 corrosion protection) |
| H₂ Range | 0–5000 ppm<sub>v</sub> in oil |
| H₂ Accuracy | ±10% of reading or ±15 ppm<sub>v</sub> (whichever is greater) |
| H₂ Stability | ±3% of reading/year |
| H₂ Cross-sensitivity | <2% to CO₂, C₂H₂, C₂H₄, CO |
| a<sub>w</sub> Range | 0–1 (0–100 %RS) |
| a<sub>w</sub> Accuracy | ±0.02 (0–90 %RS), ±0.03 (90–100 %RS) |
| a<sub>w</sub> Response Time (90%) | 10 min at +20 °C in still oil |
| Sensor | HUMICAP® 180L2 |
| Power | 4 W typical, up to 12 W (galvanically isolated input) |