| Brand | Unbranded |
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Check the listing for details. MQ-2 Smoke Sensor Module Smoking Detector Alarm Relay Switch Controller 12V 24V. Condition: New. Listed at 7.88 USD. This module can detect smoke concentration, and a smoke detection threshold can be set when using it. 1 Smoke sensor. 6: Board size 49 45+20mm. 5: Simple to use, with wiring diagram. Product Image.
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