MQ-137 Ammoniakdetektion NH3 Gassensormodul MQ137 Analog + TTL Pegelausgang U
15,22 €
Main chip: LM393, NH3 gas sensor probe. It has high sensitivity and selectivity to ammonia;. Dual signal output (analog output and TTL level output);. TTL output effective signal is low level; (the signal light is on when the output is low level, and can be connected to the MCU IO port).
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