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Patented Design
Gas analyzer and sonic anemometer in one sensor
 
 
 
 
 
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Technical Description

The IRGASON has the following outputs:

  • Ux (m/s)
  • Uy (m/s)
  • Uz (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

IRGASON Specifications

Generala

  • U.S. Patent No. D680455
  • Operating Temperature Range: -30° to +50°C
  • Calibrated Pressure Range: 70 to 106 kPa
  • Power: 5 W (steady state and power up) at 10 to 16 Vdc
  • Measurement Rate: 100 Hz
  • Output Bandwidth: 5, 10, 12.5, 20, or 25 Hz; user programmable
  • Output Signal: SDM, RS-485, USB, analog
  • Auxiliary Inputs: air temperature and pressure
  • Cable Length: 3 m (9.8 ft) from IRGASON head to EC100
  • Weight
    • IRGASON Head and Cables:
      2.0 kg (4.4 lb)
    • EC100 Electronics: 3.2 kg (7 lb)

Gas Analyzera,b

  • Factory Calibrated Range
    • CO2: 0 to 1830 mg/m3 (0 to 1000 ppm)
    • H2O: 0 to 42 g/m3 (-60° to +35°C dew point)
  • Path Length: 15.37 cm (6.05 in)
  • CO2 Performance
    • 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
    • Precision RMS (maximum)c: 0.2 mg/m3 (0.15 μmol/mol)
    • Sensitivity to H2O (maximum):
      ±1.1 x 10-4 mol CO2 /mol H2O
  • H2O Performance
    • 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
    • Precision RMS (maximum)c: 0.004 g/m3 (0.006 mmol/mol)
    • Sensitivity to CO2 (maximum):
      ±0.1 mol H2O/mol CO2

Sonic Anemometer Accuracya

  • Offset Error
    • ux, uy: < ±8.0 cm s-1
    • uz: < ±4.0 cm s-1
  • Gain Error
    • Wind vector within ±2° of horizontal:
      < ±5% of reading
    • Wind vector within ±3° of horizontal:
      < ±10% of reading
    • Wind vector within ±6° of horizontal:
      < ±20% of reading
  • Measurement Precision RMS
    • ux, uy: 1 mm s-1
    • uz: 0.5 mm s-1
    • c: 15 mm s-1 (0.025°C)
  • Speed of Sound: Determined from 3 acoustic paths; corrected for crosswind effects
  • Rain: Innovative signal processing and transducer wicks considerably improves performance of the anemometer during precipitation events

Basic Barometer (option -BB)a

  • Total Accuracy
    • -30° to 0°C: ±3.7 kPa at -30°C, falling linearly to ±1.5 kPa at 0°C
    • 0° to 50°C: ±1.5 kPa
  • Measurement Rate: 10 Hz

Enhanced Barometer (option -EB)a

  • Manufacturer: Vaisala PTB110
  • Total Accuracy (-30° to +50°C): ±0.15 kPa
  • Measurement Rate: 1 Hz

Ambient Temperaturea, d

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


a
Specifications are subject to change without notice.

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

cThe noise RMS specifications assume 25°C, 597 mg/m3 CO2 density, 85 kPa, 14 g/m3 water density, and 20 Hz bandwidth.

dThe accuracy specification for the sonic anemometer is for wind speeds < 30 m s-1 and wind angles between ±170°.


Resources and Links

Ships With

(1) 8125 Flat-blade Screwdriver

(2) 17492 U-bolts & nuts

(1) Packing Information Sheet

(1) 26563 USB cable

(1) CM250 BOOM Adapter

(1) 27007 Support CD

(1) 41303-5A Radiation Shield

(1) 26520 Special Temperature Probe with 10ft cable

(2) 17446 U-bolts & nuts

(12) 2207 Cable ties

(1) 4905 Desiccant

(1) Certificate of Conformance

Shipping Weights & Dims

Single Box Shipping Weight: 55 lb

Single Box Shipping Dimensions:
32 x 26 x 17 in.