Dear Colleagues, I am working with gas sensing nanomaterials now and frequently see that many authors utilize 6-pin chips with steel mesh cover to fabricate the prototype gas sensors. The chips resemble something like dummy MQ2, MQ5, or MQ-135 modules for Arduino. However, I could not find on the internet any suppliers of such dummy/empty chips. (It is easy to find numerous ready chips with an installed sensing layer though.) Could you, please, suggest some suppliers which can provide the dummy chips, better in EU.

Sincerely yours,

Alexander.

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