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Grove - Gas Sensor(MQ-2):Combustible Gas Smoke [medium sensitivity]
Grove - Gas Sensor(MQ-3):Alcohol and Benzine [high sensitivity] Long warm-up
Grove - Gas Sensor(MQ-5):LPG, Natural Gas, Town Gas [high sensitivity]
Grove - Gas Sensor(MQ-9):LPG, CO, CH4 [low sensitivity]
Grove - Air Quality Sensor(TP-401): CO, alcohol, acetone, thinner, others [high sensitivity].

Note - Gas sensors need to be heated, first minute the data is incorrect. Air
Quality sensor needs 48h to stabilize.