Review on 🔌 Complete Starter Kit: 1 Pack MQ-2 MQ-3 MQ-4 MQ-5 MQ-6 MQ-7 MQ-8 MQ-9 MQ-135 Gas Sensor Module Set by Shah Nelson
Not a bad NH3 detector for the money but not very accurate and has some limitations.
Relatively inaccurate if you want decent ppm readings. This is more useful for simply detecting the presence of NH3 than for getting accurate readings. Another disadvantage is the very long warm-up time of several hours. That being said, if you just want to build an NH3 detector, this will work. Keep in mind that a good NH3 sensor costs over $400.
- High marks for tester support and durability
- Not as thick as other options
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