Demonstrate relative methane-response trends with MQ-4 and local indicators; it must not replace a certified household gas alarm.
Engineering approach
Demonstrate relative methane-response trends with MQ-4 and local indicators; it must not replace a certified household gas alarm.
Implementation guidance
Use a stable heater supply, long preheat, fresh-air baseline, and a controlled methane reference only in a properly equipped lab. Show a trend and fault state rather than claiming an exact safe/unsafe threshold.
Scope and limitations
A hobby MQ-4 module has no certified alarm behavior, self-test, fault monitoring, or guaranteed threshold. If gas is suspected, leave the area, avoid switches and flames, and follow local emergency guidance.
Choose the required components and verify their specifications in the Juthour Tech store.
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