AE Gas Monitors, Portable Gas Leak Tester (Sniffer) - TG Technical Services
UEi CD100A Combustible Gas Detector | ValueTesters.com
ATO Portable Hydrogen Gas Leak Detector 0 to 500 ppm, H2 Gas Monitor with Sound and Light Alarm - Amazon.com
Seesii Portable Gas Leak Detector, Handheld Natural Gas Sniffer High Sensitivity with LCD Display, Battery Powered, Locates Combustible Gas Like LPG, LNG, Methane & Butane Gases,Carbon Monoxide - Amazon.com
Refrigerant Leak Detector | Bosean Portable Gas | Gas Leak Detector - Portable Gas Leak - Aliexpress
Digital Combustible Gas Leak Detector 0-10000 PPM Portable CH4 Natural Coal Flammable Gooseneck Gas Fast Tester Sensor 4 Alarm - AliExpress
Elitech Inframate C R744 CO2 Leak Detector Sensitivity up to 6g per year – Elitech Technology, Inc.