IRGASON 一体式开路气体分析仪和三维超声风速仪
专利设计
同时空测量的一体式气体分析仪和三维超声风速仪
气象 应用支持 水资源 应用支持 能源 应用支持 湍流通量 应用支持 基础结构/工业设施 应用支持 土壤 应用支持

概览

Campbell Scientific’s IRGASON®将开路分析仪与超声风速仪进行了完全集成。该设备专为涡动相关法碳通量与水通量测量设计，其专利设计（美国专利号：D680455）相比独立传感器，安装和使用更为简便，且测量精度更高。 IRGASON 可同时测量以下参数：二氧化碳绝对量、水蒸气绝对量、空气温度、大气压力、三维风速以及超声气温。

如需了解协同测量（collocated measurement）的优势详情，可参考海报 "通过开路气体分析仪与超声风速仪协同放置提升涡动通量测量效果"。

优势与特点

  • New conformal coating helps protect sonic transducers in corrosive environments
  • Combined support structure causes less flow distortion than two separate sensors
  • Truly collocated gas analyzer and sonic anemometer measurements avoid flux loss due to sensor separation
  • Synchronized gas analyzer and sonic anemometer measurements avoid the need to correct for time lag
  • Low power consumption; suitable for solar power applications
  • Temperature-compensated measurements without active heat control
  • Low noise
  • Maximum output rate of 60 Hz with 20 Hz bandwidth
  • Angled windows to shed water; tolerant to window contamination
  • Field rugged
  • Field serviceable
  • Factory calibrated over wide range of CO2, H2O, pressure, and temperature in all combinations encountered in practice
  • Extensive set of diagnostic parameters
  • Fully compatible with Campbell Scientific data loggers; field setup, configuration, and field zero and span can be accomplished directly from data logger
  • Sonic temperature determined from three acoustic paths; corrected for crosswind effects
  • Innovative signal processing and transducer wicks considerably improve performance of anemometer during precipitation events

图像

技术说明

IRGASON 可输出以下变量：

  • Ux (m/s)
  • Uy (m/s)
  • Uz (m/s)
  • 声温 (°C)
  • 超声诊断值
  • CO2 密度 (mg/m3)
  • H2O 密度 (g/m3)
  • 气体分析仪诊断值
  • 环境温度 (°C)
  • 大气压 (kPa)
  • CO2 信号强度
  • H2O 信号强度

产品规格

Patent U.S. Patent No. D680455
Operating Temperature Range -30° to +50°C
Calibrated Pressure Range 70 to 106 kPa
Input Voltage Range 10 to 16 Vdc
Power 5 W (steady state and power up) at 25°C
Measurement Rate 60 Hz
Output Bandwidth 5, 10, 12.5, or 20 Hz (user-programmable)
Output Options SDM, RS-485, USB, analog (CO2 and H2O only)
Auxiliary Inputs Air temperature and pressure
Warranty 3 years or 17,500 hours of operation (whichever comes first)
Cable Length 3 m (10 ft) from IRGASON to EC100
Weight
  • 3.2 kg (7.1 lb) for EC100 electronics
  • 2.8 kg (6.1 lb) for IRGASON head and cables

Gas Analyzer
Path Length 15.37 cm (6.05 in.)

A temperature of 20°C and pressure of 101.325 kPa was used to convert mass density to concentration.

Gas Analyzer - CO2 Performance
-NOTE- A temperature of 20°C and pressure of 101.325 kPa was used to convert mass density to concentration.
Accuracy
  • Assumes the following: gas analyzer was properly zero and spanned using appropriate standards; CO2 span concentration was 400 ppm; H2O span dewpoint was at 12°C (16.7 ppt); zero/span temperature was 25°C; zero/span pressure was 84 kPa; subsequent measurements made at or near span concentration; temperature is not more than ±6°C from zero/span temperature; and ambient temperature is within gas analyzer operating temperature range
  • 1% (standard deviation of calibration residuals)
Precision RMS (maximum) 0.2 mg/m3 (0.15 μmol/mol)

Nominal conditions for precision verification test: 25°C, 86 kPa, 400 μmol/mol CO2, 12°C dewpoint, and 20 Hz bandwidth
Calibrated Range 0 to 1,000 μmol/mol (0 to 3,000 μmol/mol available upon request)
Zero Drift with Temperature (maximum) ±0.55 mg/m3/°C (±0.3 μmol/mol/°C)
Gain Drift with Temperature (maximum) ±0.1% of reading/°C
Cross Sensitivity (maximum) ±1.1 x 10-4 mol CO2/mol H2O

Gas Analyzer - H2O Performance
-NOTE- A temperature of 20°C and pressure of 101.325 kPa was used to convert mass density to concentration.
Accuracy
  • Assumes the following: gas analyzer was properly zero and spanned using appropriate standards; CO2 span concentration was 400 ppm; H2O span dewpoint was at 12°C (16.7 ppt); zero/span temperature was 25°C; zero/span pressure was 84 kPa; subsequent measurements made at or near span concentration; temperature is not more than ±6°C from zero/span temperature; and ambient temperature is within gas analyzer operating temperature range
  • 2% (standard deviation of calibration residuals)
Precision RMS (maximum) 0.004 g/m3 (0.006 mmol/mol)

Nominal conditions for precision verification test: 25°C, 86 kPa, 400 μmol/mol CO2, 12°C dewpoint, and 20 Hz bandwidth
Calibrated Range 0 to 72 mmol/mol (38°C dewpoint)
Zero Drift with Temperature (maximum) ±0.037 g/m3/°C (±0.05 mmol/mol/°C)
Gain Drift with Temperature (maximum) ±0.3% of reading/°C
Cross Sensitivity (maximum) ±0.1 mol H2O/mol CO2

Sonic Anemometer - Accuracy
-NOTE- The accuracy specification for the sonic anemometer is for wind speeds < 30 m s-1 and wind angles between ±170°.
Offset Error
  • < ±8.0 cm s-1 (for ux, uy)
  • < ±4.0 cm s-1 (for uz)
  • ±0.7° while horizontal wind at 1 m s-1 (for wind direction)
Gain Error
  • < ±2% of reading (for wind vector within ±5° of horizontal)
  • < ±3% of reading (for wind vector within ±10° of horizontal)
  • < ±6% of reading (for wind vector within ±20° of horizontal)
Measurement Precision RMS
  • 1 mm s-1 (for ux, uy)
  • 0.5 mm s-1 (for uz)
  • 0.025°C (for sonic temperature)
  • 0.6° (for wind direction)
Speed of Sound Determined from three acoustic paths (corrected for crosswind effects)
Rain Innovative signal processing and transducer wicks considerably improve performance of anemometer during precipitation events

Basic Barometer (option -BB)
Total Accuracy
  • ±3.7 kPa at -30°C, falling linearly to ±1.5 kPa at 0°C (-30° to 0°C)
  • ±1.5 kPa (0° to 50°C)
Measurement Rate 10 Hz

Enhanced Barometer (option -EB)
Manufacturer Vaisala PTB110
Total Accuracy ±0.15 kPa (-30° to +50°C)
Measurement Rate 1 Hz

Ambient Temperature
Manufacturer BetaTherm 100K6A1IA
Total Accuracy ±0.15°C (-30° to +50°C)

兼容性

Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.

数据采集器

Product Compatible Note
CR1000X (retired)
CR300 (retired)
CR3000 (retired)
CR350
CR6
CR800 (retired)
CR850 (retired)

下载

EasyFlux DL for CR6OP v.2.02 (99.2 KB) 31-10-2025

CR6 datalogger program for Campbell open-path eddy-covariance systems.

查看修订历史

EasyFlux DL for CR6OP (CMA) v.1.01 (56.1 KB) 22-02-2022

CR6 datalogger program for Campbell open-path eddy-covariance systems.

Note: This version is customized for CMA flux format only.

EC100 OS v.8.02 (560 KB) 14-10-2019

EC100 Operating System.

Watch the Video Tutorial: Updating the EC100 Operating System.

查看修订历史

ECMon v.1.6 (10.7 MB) 29-03-2016

EC100-Series Support Software.

Device Configuration Utility v.2.34 (48.7 MB) 09-04-2026

A software utility used to download operating systems and set up Campbell Scientific hardware. Also will update PakBus Graph and the Network Planner if they have been installed previously by another Campbell Scientific software package.

Supported Operating Systems:

Windows 11 or 10 (Both 32 and 64 bit)

查看修订历史

EasyFlux DL for CR1000XOP v.2.02 (99.2 KB) 31-10-2025

CR1000X datalogger program for Campbell open-path eddy-covariance systems.

查看修订历史

常见问题解答

IRGASON: 22

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  1. How often do the windows on the IRGASON™ or EC150 need to be cleaned?

    The factory calibration accounts for CO2 and H2O signal strengths down to 0.7. Therefore, to ensure quality data, windows should be cleaned before signal strengths drop below 0.7. 

  2. How can the IRGASON™ or EC150 recover more quickly from precipitation, dew, or frost?

    The EC150 and IRGASON™ gas analyzer windows are polished, slanted at an angle, and coated with a hydrophobic material to prevent water from collecting on their surfaces. Wicks may also be used on the windows to promote capillary action and move water away from the window edges. Also, heaters in the snouts may be turned on to help minimize data loss because of precipitation and condensation events.

  3. What is the demonstrated wattage for power-up on the IRGASON™ or EC150?

    The power requirement for the IRGASON™ or EC150 with CSAT3A is 5 W at room temperature regardless of whether it is powering up or under steady-state operation.  At extreme cold or hot temperatures, the power requirement reaches 6 W.

  4. Is the IRGASON™ well suited for all environments?

    The IRGASON™ has been optimized for most terrestrial applications. If the IRGASON is to be used in a marine environment or in an environment where it is exposed to corrosive chemicals (for example, sulfur-containing compounds in viticulture), expect the sonic transducers to age more quickly and require replacement sooner than a unit deployed in an inland, chemical-free environment. If possible, mount the IRGASON in a way that reduces exposure to saltwater spray/splash and/or corrosive chemicals.

  5. Why is a barometer needed for the IRGASON™ or the EC150?

    The barometer and temperature sensor are needed because the IRGASON™ and EC150 have been calibrated at the factory over a range of temperatures (-30° to +50°C) and barometric pressures (70 to 106 kPa). 

  6. If getting a span gas is difficult, can the analyzer just be zeroed?

    For greatest accuracy, Campbell Scientific recommends that a zero and a span be done on the EC150 or IRGASON™. However, if a span gas is difficult to obtain, at the minimum, perform a zero on the analyzer.  Performing a zero will correct the majority of drift experienced by the analyzer. Follow the zero procedure in the analyzer’s manual for details.

  7. Which software package is recommended for doing post-processing on data from the IRGASON™ or EC150?

    EdiRe (University of Edinburgh) and MATLAB (MathWorks) are two of the products eddy-covariance customers have used to post-process their data. Others are also available. (For more information, review the EdiRe technical paper titled “EdiRe Software for Micrometeorological Applications.)

    Campbell Scientific’s default data output format is TOB1 binary, which is compatible with most post-processing software packages.  If another data format is needed, Campbell Scientific’s LoggerNet software may be used to convert TOB1 to another format.

  8. How often should a zero/span be done on the IRGASON™ or EC150?

    The frequency at which a zero/span should be done is highly dependent on site conditions; however, a monthly zero/span is a good starting point.  As a general guideline, monitor the optical drift of the instrument over time to determine how often a zero/span procedure needs to be performed. 

  9. Can a fine-wire thermocouple be used with the IRGASON™ or EC150?

    Yes. A fine-wire thermocouple, such as a FW05, can be used.

  10. Can a molecular sieve be used in the future to replace bottles for gas analyzers sold before July 2017?

    The molecular sieve is a direct replacement for the old magnesium perchlorate bottles. The molecular sieve may be used for any Campbell Scientific analyzer that used the old bottles.

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