Gas Dog Gas Detectors are equipped with advanced sensors and sound, light and vibration alarms, designed to provide accurate measurements of combustible, VOC and toxic gas detection. Gas Dog's affordable portable gas leak detectors are compact and user-friendly, suitable for a variety of industries and personal safety needs. Gas Dog single gas monitors can detect carbon monoxide (CO), carbon dioxide (CO2), H2S, hydrogen (H2), oxygen (O2), natural gas, ammonia (NH3), methane, propane, ozone, chlorine, nitrogen, formaldehyde, sulfur dioxide (SO2), and are perfect for travel, camping and transportation. GasDog Gas Detectors have worry-free performance and can withstand harsh environments. The sensors and batteries are easy to replace, making the whole device durable. The GasDog Gas Detector is compact and can be inserted into a hard hat, tied to a belt or placed in a pocket, freeing your hands. The GasDog portable gas detector is wrapped in a tough rubber sheath, which is drop-proof and impact-resistant. At the same time, it has a rigorous design, which is more suitable for use in harsh environments. GasDog Gas Detector can be operated with one button, which is simple and convenient, saving effort and worry while accurately detecting and displaying toxic gas concentration or oxygen content. GasDog Gas Detector has a large and clear LCD display and a long-lasting lithium battery, which is convenient for users to operate in low light or at night.