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[BELLA]New original ammonia sensor MQ 137 MQ137 NH3 gas sensor module ...
![[BELLA]New original ammonia sensor MQ 137 MQ137 NH3 gas sensor module ...](https://ae01.alicdn.com/kf/HTB1SDV6g8DH8KJjSszcq6zDTFXaL/BELLA-New-original-ammonia-sensor-MQ-137-MQ137-NH3-gas-sensor-module-2pcs-lot.jpg)