With advancements in high-precision greenhouse gas detection equipment, the demand for multi-point and multi-component respiration monitoring of soil and water has grown significantly. However, traditional multi-point soil respiration measurement systems face three major technical challenges:
- Limitations of Equipment Sharing: Multiple respiration chambers must cyclically share a single gas analyzer for sequential point-by-point monitoring. This results in a longer measurement interval for each point. The more chambers in use, the longer the overall measurement interval becomes, sometimes extending to several hours.
- Significant Temperature Interference: During sequential measurements, fluctuations in environmental temperature - such as changes in soil temperature due to solar radiation - can significantly affect microbial activity. As a result, the measured values may deviate from the true respiration rate by 10-30% or more.
- Reduced Data Comparability: These errors, along with potential instrument drift, diminish the reliability of statistical analyses across different treatment groups or time series, leading to larger discrepancies in findings.
The PRI-8700 Multi-Point Synchronous Sampling and Online Analysis System (Patent Pending) addresses the technical limitations of traditional multi-point soil and water respiration systems. It utilizes steady-state carrier gas and specially designed open respiration chambers (Patent Pending), integrating synchronous sampling and online analysis technologies. This innovation enables simultaneous multi-point sampling and real-time analysis for both soil and water respiration, improving the accuracy of carbon flux accounting, soil health assessments, and other related research.
The open chambers prevent the buildup of gases like CO2, CH4, and N2O, along with their isotopes, thereby eliminating feedback inhibition. Compared to traditional closed-loop systems, this measurement process is less likely to interfere with concentration and isotope diffusion in the soil profile and minimizes the adsorption of high-concentration sticky gases on the chamber surface. This makes the open system the ideal choice for measuring both gas concentration and isotope fluxes simultaneously.
The PRI-8700 system is both innovative and practical, allowing for efficient measurement of soil and water respiration. It meets the needs of diverse scientific research fields, including ecology, agronomy, forestry, fertilizer science, permafrost studies, seismology, and landfill research.
Key Feather
- Ultra-High Throughput: A greater number of samples can be measured in each cycle
- Multi-Point Synchronization: Sampling times are synchronized across all points within the cycle
- High Data Quality: Strong consistency between the data of both experimental treatments and repetitions
- Stable Pressure Control: A patented pressure vent minimizes air disturbance
- High Customization: Include the number of channels, length of cable, and type of chamber
- Wide Applicability: Suitable for various gas and isotope analyzers
Specifications
Connection Capability: Supports up to 64 transparent and opaque chambers, with customization available.
Calibration: Equipped with a built-in three-channel system for online calibration.
Delivery Plumbing: Features independent plumbing systems, providing a flow rate of up to 20 L/min to each chamber via a Mass Flow Controller (MFC).
Sample Plumbing: Incorporates a standalone diaphragm pump, providing a flow rate of up to 2 L/min to a bag through an MFC.
Sample bag: Standard 2 L, with customization available.
Coverage Area: Offers a coverage area of 15.0 meters with a single cable assembly; with customization available.
Sampling Temperature: -10 ~ 45 °C
Barometric Pressure Sensor:
Measurement Range: 30 to 110 kPa
Sensor Accuracy: ±0.12 hPa within the range of 95 to 105 kPa
Weatherproof Rating: Certified to IEC IP55 standard.
Weatherproof Rating: Tested to IEC IP55 standard
Operating Range:
Temperature: –20 to 45 °C
Humidity: 0 to 95% RH, non-condensing
User Data Storage: 200 GB total non-volatile
BDS: Accuracy 1 m CEP
Power Requirements: 12 VDC, 15A (120 VAC and 240 VAC with optional power supply).
Contact PRl-ECO for various chamber configration.
Specifications subject to change without notice.
Manufacturer: PRI-ECO，China