Trace Gas Calibration Systems Using Permeation Devices

2008 ◽  
pp. 110-110-11 ◽  
Author(s):  
GD Mitchell
Keyword(s):  
Trace Gas

A SIMPLE DEVICE FOR TRACE GAS ANALYSES IN THE ATMOSPHERE

1983 ◽  
Vol 44 (C6) ◽  
pp. C6-587-C6-591
Author(s):  
D. Sourlier ◽  
O. Oehler
Keyword(s):  
Simple Device ◽  
Trace Gas

MEDUSA Trace Gas with Merged 1-second Data

2011 ◽  
Author(s):  
S.C. Wofsy, ◽  
B. Stephens, ◽  
R. Keeling, ◽  
J. Bent,
Keyword(s):  
Trace Gas

Long Term Planning for the ExoMars Trace Gas Orbiter Mission: Opportunity Analysis and Observation Scheduling

2018 ◽  
Author(s):  
Bernhard Geiger ◽  
Alejandro Cardesin Moinelo ◽  
David Frew ◽  
Mike Ashman ◽  
Juan Jose Garcia Beteta ◽  
...  
Keyword(s):  
Trace Gas ◽  
Orbiter Mission

scholarly journals Spectroscopic Techniques versus Pitot Tube for the Measurement of Flow Velocity in Narrow Ducts

Sensors ◽  
2020 ◽  
Vol 20 (24) ◽  
pp. 7349
Author(s):  
Francesco D’Amato ◽  
Silvia Viciani ◽  
Alessio Montori ◽  
Marco Barucci ◽  
Carmen Morreale ◽  
...  
Keyword(s):  
Flow Field ◽  
Flow Velocity ◽  
Pitot Tube ◽  
Optical Measurements ◽  
Trace Gas ◽  
Dual Function ◽  
Spectroscopic Techniques ◽  
Gas Composition ◽  
Flow Conditions ◽  
Theoretical Simulation

In order to assess the limits and applicability of Pitot tubes for the measurement of flow velocity in narrow ducts, e.g., biomass burning plants, an optical, dual function device was implemented. This sensor, based on spectroscopic techniques, targets a trace gas, injected inside the stack either in bursts, or continuously, so performing transit time or dilution measurements. A comparison of the two optical techniques with respect to Pitot readings was carried out in different flow conditions (speed, temperature, gas composition). The results of the two optical measurements are in agreement with each other and fit quite well the theoretical simulation of the flow field, while the results of the Pitot measurements show a remarkable dependence on position and inclination of the Pitot tube with respect to the duct axis. The implications for the metrology of small combustors’ emissions are outlined.

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