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MQ138 Gas Sensor Module Formaldehyde Sensor Gas Board DC 5V LM393 Chip Formaldehyde Sensing Probe MQ-138 Board

USD 20.46USD 25.58

MQ138 Gas Sensor Module Formaldehyde Sensor Gas Board DC 5V LM393 Chip Formaldehyde Sensing Probe MQ-138 Board

Description
Specification
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