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eosFD Soil CO2 Flux Sensor
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概要

The eosFD, manufactured by Eosense, uses the patented Forced Diffusion (FD) technology to measure soil CO2 flux directly using an NDIR sensor and small internal diaphragm pump. It features onboard data logging capabilities that enable it to be a stand-alone sensor; however, it can also deliver analog or serial data to Campbell Scientific data loggers. This sensor compliments a Campbell Scientific eddy-covariance system. The included eosLink software enables you to connect, configure, and collect data directly from the sensor.

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利点と特徴

  • Zero spatial constraints
  • Truly portable
  • High temporal resolution
  • Weatherproof
  • Onboard data logger
  • Serial/analog data logger compatibility
  • Low power
  • No external moving parts
  • Seamless integration with EasyFlux® DL
  • Real-time data monitoring with EasyFlux® Web

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詳細

The eosFD is a stand-alone soil CO2 flux sensor containing a single NDIR sensor, an internal data logger, and a small diaphragm pump. The eosFD uses Eosense’s patented Forced Diffusion technology to measure soil CO2 flux directly.

Traditionally, gas fluxes from the soil surface are measured using closed chambers systems, with these “accumulation chambers” trapping gas during the measurement period. Forced Diffusion is a membrane-based steady-state approach for measuring gas flux that establishes an equilibrium between gas flowing into the chamber and gas flowing out of the chamber through the membrane, without any external chamber movement.

By carefully characterizing the diffusive properties of the membrane used in the instruments, the eosFD chamber gas concentration can be correlated directly to the gas flux rate. Essentially, the amount by which this membrane limits the flow of gas out of the chamber is known, and thus, by comparing the internal concentration to that outside the instrument, the flux rate can be calculated. Unlike other automated chambers that lift and lower onto the soil surface, the Forced Diffusion approach does not require external moving parts, allowing it to be deployed in the harshest climates for extended periods without intervention.

仕様

Operating Temperature Range -20° to +50°C (-4° to +122°F)
Operating Power < 1.6 W (average)
Operating Voltage 12 Vdc
Analog Output 0 to 5 Vdc
Data Capacity 65,000 measurements
Measurement Rate 5 min to 1 day (user specified)
Flux Range 0 to 20 µmol//m2/s
Flux Resolution < 0.2 µmol/m2/s
Dimensions 10.2 x 25 cm (4 x 9.8 in.)
Weight 1.6 kg (3.5 lb)

互換性

注意： 以下は代表的な互換性情報を示しています。互換性のある製品や互換性のない製品をすべて網羅したリストではありません。

Data Loggers

製品 互換性 注意
CR1000 (リタイア)
CR1000X (リタイア)
CR300 (リタイア)
CR3000 (リタイア)
CR310
CR6
CR800 (リタイア)
CR850 (リタイア)
CR9000X (リタイア)
CR9000XC (リタイア)
CRVW3
CRVW3-NE

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