Device: Flying Fish MQ-5 gas sensor
Application: Propane gas detection
Processor: Arduino UNO WiFi Rev2
Yesterday:
After powering device up and letting it set for an hour the sensor responded
immediately to sensing a small amount of propane released in its vicinity.
Baseline w/ no gas: .434 vDC at UNO input equating to a value of "113"on serial monitor.
The potentiometer was set to trigger the digital output at around "300."
Upon sensing the gas the sensor immediately went to 800 - 1000 and then
slowly fell back to to 120- 130 with gas removal.
Today:
Unit was disconnected overnight. Upon applying power the sensor immediately
went to around "1000" on the serial monitor, w/ no gas presence.
Device has been energized for over an hour and the output voltage remains very
high at around 4.7 vDC;
Has anyone used these Flying Fish sensors for extended periods of time and they
remained reliable? They are certainly inexpensive and I am wondering if it is typical for them to drift and lose their accuracy.
If anyone has used a different gas sensor with success I am curious to know what it is.
I may get another Flying Fish just to see if this one was a fluke.