Ethane Monitors

 

single laser monitorEXTREMELY PRECISE MIXING RATIO, EXTREMELY SHARP TIME RESOLUTION

Aerodyne’s trace gas monitor for ethane (C2H6) has exceptionally fast response time, high sensitivity and  chemical specificity.  The measurement sensitivity is specified as at least 60 ppt in one second and 20 ppt in one minute.  This high sensitivity and fast time response make Aerodyne’s ethane monitor significantly more capable and versatile than other commercial monitors. 

The figure at right demonstrates this sensitivity.  The upper trace is the ethane mixing ratio in room air plotted versus time for a three hour period.  The Allan plot in the lower half of the figure shows the precision as a function of averaging time.  Note that the one second precision is 45 ppt and the one minute precision is 8 ppt. 

 

 

Specifications

Molecule

C2H6

Laser Frequency

~2900 cm-1

Precision (1 s)

0.05 ppb(1 s)

0.02 ppb (60 s)

Accuracy

5%  or 0.1 ppb

Primary time response

0.1 seconds with 300 liter/min pump