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PRI-8800 Automatic Varying Temperature Incubations and Continuous Soil Respiration Measurements System
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       A reliable and precise estimate of the temperature sensitivity (Q10) of soil organic matter (SOM) decomposition is critical to predict feedbacks between the global carbon cycle and climate change.
       Traditional methods for estimating Q10 includes CDM mode (constant temperature incubation and discontinuous measurements) and VDM mode (varying temperature incubation and discontinuous measurements). According the conclusion of Robinson(2017),no less than 20 temperature points could get more precision Q10. Which is difficult for traditional measurement. Combining rapidly VCM mode (varying temperature incubations and continuous measurements), PRI-8800 (patented) leads a new method for Q10 estimation. VCM mode eliminates the underestimated errors by both CDM and VDM modes, provide a more accurate and rapid estimation of the temperature response of SOM decomposition and can be used for large-scale estimation of Q10.
       PRI-8800 is a new and exciting solution for continuous soil respiration measurements combining varying temperature incubations in lab. Excellent compatibility and extensibility with other analyzers such as various GHGs and trace gas concentration analyzers, various isotope analyzers and other gas measurements devices. Applications are related to soil respiration, biodegradability of plastics in solid medium, biodegradability of plastics in aqueous medium, organic waste (solid or liquid samples), food industry, compost biological activity, wastewaters, R&D in biotechnology, biology, ecology and pharmacy.

Key Feature
  • Varying temperature incubations and continuous measurements;
  • Excellent compatibility and extensibility with various analyzers;
  • Automatic temperature control (-20 ~ 60℃);
  • Temperature fluctuation is better than 0.05℃;
  • Dual gas circuit to eliminate effect of initial high concentration;
  • Inherent cahnnels for isotope and concentration calibration.

Parameter Specifications
Flask Capacity 150 mL
Tray Capacity 25 samples
Temperature Range -20 ~ 60℃
Temperature Fluctuation ± 0.05℃
ACC Temperature + 40℃
Refrigerating Capacity @ 20℃ BT/20°C AT 2000W
Heating Rate / Cooling Rate (5-30℃) 1℃/min
Dimensions of Water Bath (Inside) 400 mm W × 400 mm D × 200 mm H
Autosampler Precision 0.02 mm
Air Temperature Precision ±0.15℃ (Temp. sensor)
Pressure Precision ±0.05% (sensor)
Flow Rate 1 L/min
Gas Tube 1/8” Stainless or Teflon
CO2 Absorption Soda lime
System Response time < 4 s
Calibration Channels (option) 3
Interface Android Pad
Power 100 ~ 240VAC,50/60 Hz,
1500 W(Heating); 1250 W (Cooling)
Dimensions 762 mm × 950 cm × 1700 mm
8800-1 CO2 H2O analzyer (Integrated in PRI-8800)
CO2 Accuracy ±2%
CO2 Measurement Range 0-2000 ppm
H2O Precision (Typical) ±2%
H2O Measurement Range 0~100% RH
Sampling Temperature -10 ~ 45 °C
Sampling Pressure 80 ~ 115 kPa
Sampling Humidity 0-100% R.H, non-condensing
Fittings 1/4″ Swagelok

PRI-8800 includes water bath with refrigerator and heater system, autosampler, 25 sample tray, 50 flasks, control box.
8800-1: stanard CO2 H2O analyzer with 2% CO2 accuracy.
Ultra CO2 N2O H2O analyzer from Aeris Technologies.

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