The OP2 provides simultaneous rapid measurement of atmospheric
fluctuations of carbon dioxide and water vapor. It has been specially designed to be used in conjunction with a sonic anemometer for
eddy-covariance studies, where the correlation between fluctuations in CO2 and H2O with vertical windspeed are used to estimate vertical
fluxes of CO2 and water vapor.
Traditionally these measurements are made using a "closed path" analyzer, such as an ADC2250. Although the ADC2250 itself has a very
fast response time (0.1 second), there is always a lag time between the sampling area and the analyzer some centimeters away.
Now using "state of the art" gas analyzer technology, OP2 has been especially developed to overcome these delayed responses.
| Features
- Open path design/Immediate response
- Simultaneous CO2/H2O
- 0.02ppm CO2 resolution
- Weather proof
- Power by 12V DC
- Typical use with sonic anemometer and other
environmental sensors
|
Specifications
Measurement Technique
Open path, absolute, infrared (NDIR) analyzer. Simultaneous CO2 and H20 measurements.
CO2
Typical calibration range 200-600ppm Resolution 0.02ppm
H20
Typical calibration range 0-40mb Resolution 0.05mb
Optical path
80cm (4 x folded 20cm physical path)
Optics
All exposed optics coated for weather and abrasion resistance
Detector
Thermometrically cooled lead selenide (pbSe)
Filter system
3 narrow bandpass filters. Sampling at 3000RPM (50Hz)
Analog outputs
Nominal 15Hz. 5V
Power requirements
Nominal 12 volts DC (9.5 to 18) unregulated at 1.4A 17W.
Construction
Anodized aluminum. Entire assembly weather proofed. Calibration sleeve included. Instrument cable 5.5m.
Weight
2.5 lbs. (1.1kg)
Dimensions
Cylindrical; 37cm length x 7.6cm diameter |
