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MQ-5 Methane LPG Liquid Propane Gas Sensor ModuleFeatures-High sensitivity to LPG, natural gas, town gas.Small sensitivity to alcohol, smoke.Stable and long life.Simple drive circuit.Fast response. ..

Raspberry Pi 3B/2B/B+ GPIO Ruler V2It is a rule, and it is a Raspberry Pi reference board.It is an ideal quick reference for GPIO hacking on the Raspberry PiBegin your Raspberry Pi tutorial from it.It can be used as both CM and Inches ruler...

MQ-8 Hydrogen Gas Sensor Module H2 Alarm DetectionFeatures-Using the high-quality dual-panel design, with power indicator and TTL signal output instructions.The switching signal having a DO (TTL) output and analog output AO.TTL output valid signal is low. ( Low-level signal when the output light can..

MQ-2 Smoke LPG Butane Hydrogen Gas Sensor Detector ModuleFeatures-Good sensitivity to Combustible gas in a wide rangeHigh sensitivity to LPG, Propane, and HydrogenLong life and low costSimple drive circuitCan be used as a Digital or analog sensor..