0
\$\begingroup\$

I am working on a project for detecting natural gas of cooking stoves, I have tested several sensors but the mq4 sensor was the one that worked fine.

Now after about one month of using the sensor i bought, it is no more detecting natural gas from the stove and only detects the cigarette lighter gas!

I have two and they both showed the same problem after more than month period. I have tried changing the potentiometer several times after this error occurred,unfortunately they didn't respond.

What is the problem? Thanks in advance.

\$\endgroup\$
1
  • 6
    \$\begingroup\$ The detector has its manufacturer. They are the right address for your question. \$\endgroup\$
    – Eugene Sh.
    Commented Aug 21, 2018 at 17:25

1 Answer 1

Reset to default
10
\$\begingroup\$

From what you're describing, it sounds as if the sensor has been damaged. The datasheet for this part gives warnings about a number of different conditions that can cause damage. You mention having tested the sensor with a cigarette lighter, and this seems like the most likely cause of your problem:

2.2 Used in high gas concentration

No matter the sensor is electrified or not, if it is placed in high gas concentration for long time, sensors characteristic will be affected. If lighter gas sprays the sensor, it will cause extremely damage.

Replace the sensor, and stop using a cigarette lighter for testing.

\$\endgroup\$
0

Not the answer you're looking for? Browse other questions tagged or ask your own question.