IRGASON

Name: IRGASON
Brand: Campbell Scientific
SKU: 45306
Availability: InStock

Integrated CO2 and H2O Open-Path Gas Analyzer and 3-D Sonic Anemometer

IRGASON

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Integrated CO2 and H2O Open-Path Gas Analyzer and 3-D Sonic Anemometer

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Configuration

w/CR6-NA Mounted, Basic Barometer, w/IRGASON Carrying Case45306-6NA-BB-IC
w/CR6-NA Mounted, Basic Barometer, No Carrying Case45306-6NA-BB-NC
w/CR6-NA Mounted, Enhanced Barometer, w/IRGASON Carrying Case45306-6NA-EB-IC
w/CR6-NA Mounted, Enhanced Barometer, No Carrying Case45306-6NA-EB-NC
No CR6 or CR6 Mounting, Basic Barometer, w/IRGASON Carrying Case45306-NM-BB-IC
No CR6 or CR6 Mounting, Basic Barometer, No Carrying Case45306-NM-BB-NC
No CR6 or CR6 Mounting, Enhanced Barometer, w/IRGASON Carrying Case45306-NM-EB-IC
No CR6 or CR6 Mounting, Enhanced Barometer, No Carrying Case45306-NM-EB-NC

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Model:: IRGASON
Item Number:: 45306
Warranty:: 3 years or 17,500 hours

Overview

Campbell Scientific’s IRGASON™ fully integrates the open-path analyzer and sonic anemometer. Designed specifically for eddy-covariance carbon and water flux measurements, the patented design is easier to install and use than separate sensors and provides increased measurement accuracy. The IRGASON simultaneously measures absolute carbon dioxide and water vapor, air temperature, barometric pressure, three-dimensional wind speed, and sonic air temperature. U.S. patent D680455

For more information about the benefits of having a collocated measurement, refer to the poster "Improved eddy flux measurements by open-path gas analyzer and sonic anemometer co-location."

Key Advantages

Patented Design
Gas analyzer and sonic anemometer in one sensor

Technical Description

The IRGASON has the following outputs:

U_x (m/s)
U_y (m/s)
U_z (m/s)
Sonic Temperature (°C)
Sonic Diagnostic
CO₂ Density (mg/m³)
H₂O Density (g/m³)
Gas Analyzer Diagnostic
Ambient Temperature (°C)
Atmospheric Pressure (kPa)
CO₂ Signal Strength
H₂O Signal Strength
Source Temperature (°C)

Benefits

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

Specifications

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
100 Hz available upon request
Output Bandwidth: 5, 10, 12.5, or 20 Hz
(user-programmable)
5, 10, 20, or 25 Hz available upon request
(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 u_x, u_y)
< ±4.0 cm s^-1
(for u_z)
±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 u_x, u_y)
0.5 mm s^-1
(for u_z)
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