Gas detector in industrial refrigeration processes and biological degradation processes, including exhaled breath. Depending on the required sensitivity, different types of sensors are used (e.g., flame ionization detector, semiconductor, electrochemical, photonic membranes). Detectors usually operate near the lower exposure limit of 25ppm; however, ammonia detection for industrial safety requires continuous monitoring above the fatal exposure limit of 0.1%. There are several different sensors that can be installed to detect hazardous gases in a residence. Carbon monoxide is a very dangerous, but odorless, colorless gas, making it difficult for humans to detect. Carbon monoxide detectors can be purchased for around US$20–60. Many local
John J. Mooney this technology is the key emission-control component in all new light-duty vehicles in the United States and throughout the world." Mooney was awarded a total of 17 patents, the latest being one for a catalytic converter for the small two-stroke engines, used in chainsaws, lawn mowers, and leaf blowers. His invention reduced hydrocarbon emissions by as much as 70%, improved fuel efficiency and added up to 40% more power while addressing the pollution of an engine that often produces large amounts of pollution due to the lubricating oil mixed with the fuel. As President of the Environmental and Energy Technology