The LK-2104 Portable Soil CO2/CH4/N2O/H2O Gas Flux Measurement System is primarily designed for in-situ measurement of soil respiration rates. Additionally, it can be connected to static chambers to measure community photosynthesis or net ecosystem exchange (NEE). Gas flux measurements typically include those at the plant leaf-atmosphere interface, soil surface-atmosphere interface, and ecosystem-atmosphere interface. The main control module can integrate data from analysis modules, barometric pressure, temperature and humidity sensors, GPS, and other sources to control system operation and calculate gas fluxes or respiration rates based on customer requirements. The gas analysis module is standardly equipped with a Tunable Diode Laser Absorption Spectroscopy (TDLAS) CO2/CH4 analysis module and a mid-infrared N2O analysis module, which detect the characteristic infrared "fingerprint" absorption spectra of target gases, offering advantages such as high sensitivity, high resolution, rapid response, and non-contact monitoring.
Technical Principles
Key Features
Performance Specifications
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Parameter |
Measurement Range |
Detection Precision (1s) |
Detection Precision (10s) |
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CO2 |
0 ~2000 ppm |
0.13 ppm |
0.1 ppm |
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CH4 |
0 ~100 ppm |
10 ppb |
5 ppb |
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N2O |
0.1～100 ppm |
0.5 ppb |
0.3 ppb |
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H2O |
0-5% |
100ppm |
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Air Temperature |
-40～80 ℃ |
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Detection Chamber |
Maximum three-dimensional dimensions ≤ 200 mm, volume ≥ 250 ml. It employs a long optical path gas cell with an optical path ≥ 25 meters, compatible with wavelengths of 1500～1700 nm and 1960～2370 nm simultaneously. It utilizes low-loss optical fiber with an insertion loss ≤ 2 dB and operates within a temperature range of -20～70 ℃. |
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Power Consumption |
16 W (stable operation) |
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Sampling Flow Rate |
0.1-1 L/min, adjustable |
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Power Supply |
Lithium battery, continuous operation ≥5 hours |
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Calibration |
Factory-calibrated, no need for repeated calibration |
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Weight |
15 kg |
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Operating Environment |
Temperature -20 ~ 45 ℃, Humidity <99% R.H., non-condensing |
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Portable Automatic Opening/Closing Breathing Chamber |
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Chamber Type |
Dark chamber (stainless steel) |
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Overall Dimensions |
30(L)*27(W)*34(H) cm |
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Operating Mode |
Automatic opening/closing |
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Measurement Mode |
Flow-through measurement |
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Communication |
WIFI |
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Chamber Diameter |
20 cm |
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Measurement Area |
314 cm2 |
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Internal Volume |
2093 cm3 |
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Opening/Closing Lift Height |
24 mm |
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Opening/Closing Lift Speed |
≥3 s |
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Power Supply |
Built-in lithium battery, providing continuous operation ≥ 12 hours |
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External Sensor |
Soil triple-parameter sensor, capable of measuring soil temperature, humidity, and electrical conductivity. Compliant with SDI-12 protocol, utilizing FDR principle, with soil moisture measurement accuracy ≤ 2%. |
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Control Software |
Real-time acquisition and display of CO2, CH4, N2O, and H2O concentration data, along with sensor data. Features carbon footprint display and real-time visualization of carbon flux data for sample points on GPS maps. |
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Secondary Calculation Software |
Capable of performing secondary processing on saved raw gas concentration data, excluding outliers from the raw data and recalculating flux values, as well as batch processing data from various sample points with one-click operation. |
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Control Method |
For future software or system updates, the analyzer host is wirelessly connected to a tablet industrial computer. The accompanying tablet industrial computer is used to run the control system, collecting real-time data from various sensors, and saving raw data and calculation results in real time. |
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Optional Gas Chamber
Origin and Manufacturer: Eco-mind, China
