Emakefun MQ Gas Sensor Module Kit with Tutorial for Arduino UNO R3 MAGA 2560 Nano

Amazon.com Price: $26.99 (as of 02/06/2019 13:47 PST- Details) & FREE Shipping.

Including 9 Combustible Poisonous Gas Detector, MQ-2 MQ-3 MQ-4 MQ-5 MQ-6 MQ-7 MQ-8 MQ-9 MQ-135,very complete gas Detector Kit
With detailed tutorial and codes to help you demo, contain specifications of each sensor module to make everything easier.
All components are modular easy to connect and convenient to use

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