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AZ-7201 Handheld Propane Test Gas Leakage Tester Methane Gas Leak DetectorNewegg$18.42
10 PCS MQ5 liquefied Gas Methane Gas Sensor Combustible Gas Detection MQ-5AmazonSAVE $4.09
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Hot SMART SENSOR AS8800L Combustible Gas Detector Flammable Natural Gas Leakage Tester Tool Methane Gas Leak Detector AnalyzerNewegg$26.99
YK-818 55 Natural Gas Detector Leak Alarm Sensor Butane Methane Gas Monitor, Voice Prompt, Strobe Light Warning, Digital Display (White, No Battery)Amazon$12.99
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Norlab Methane Gas Cylinder-1971, 99.0% Pure, 17L (P)Global Industrial$7.99
MQ-7 Smoke Detection Liquefied Methane Gas Sensor Module for-Arduino Carbon Monoxide SensorAmazon$12.98
MEELYHOME Gas Leak Detection 50-1000PPM Flammable Natural Methane Gas Sniffer with Acoustic Visual Alarm for HomeAmazon$238.00
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Natural Gas Detector, Plug-in Natural Gas Alarm and Monitor for Home, Kitchen or Camper, Propane Methane Gas Leak Detector Monitor with Voice Warning & Digital Display - 1 PackAmazon$35.99
CEKKIENA [3-in-1] Carbon Monoxide Detector Portable Mini Air Quality Monitor with Lanyard Methane Gas Leak Smoke Alarm CO Temperature Humidity Sensor Built-in 1000mAh Battery, Indoor/Outdoor (Grey)Amazon$175.95
Norlab Methane Gas Cylinder-1971, 2.5%, Bal Air, 103L (J)Global Industrial