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VGEBY Propane/Natural Digital Gas Detector Plug-in with Digital Display, High Sensitivity Propane / Methane / LPG / LNG / Butane / Combustible Natural Gas Leak Detection Alarm Monitor Sensor for Home Kitchen - Walmart.com
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MQ-2 MQ-3 MQ-4 MQ-5 MQ-6 MQ-7 MQ-8 MQ-9 MQ-135 Smoke Detection liquefied Methane Gas Sensor Module for Arduino (9pcs) - Amazon.com
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