I am trying to obtain the response and recovery times for my gas sensor device. It appears the the response/recovery times are primarily dependant on the flow rate of the gas I inject into the chamber, as well as its volume. In other words, I can saturated the chamber much quicker using a higher flow rate and thus my sensor would respond quicker to the gas.
In literature the response and recovery times are always reported independant of these factors. How can I be sure that the response/recovery times i measured are not limited by the flow rate of the gas or the volume of the chamber?
Dear Kissan,
The response and recovery time of Gas/chemical sensors can be challenging to measure in the chamber, as you mentioned the flow rate is a crucial factor. However, a highly responsive sensor can easily detect even at the fastest flow rate you can possibly introduce in the chamber. In that sense, the response time can be independent of the input gas flow rate. By recording the data with very fast measurement (lowest interval) you should be able to get the response time, using a commercial sensor (as ref) sometimes helps to determine the actual quantity of the gas. Good Luck!
Shuvra Mondal really appreciate your response.
So it appears the only solution is to use the highest flow rate possible?
Dear Kissan Mistry ,
I believe it depends only on response time of your sensor.
You need to choose parameters of sensor ideas corresponding to your application.
I hope this helps.
Regards,
Prof. Wiltgen
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