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
Positec is a line of lawn and garden equipment that includes products like lawn trimmers, lawn mowers, chainsaws, leaf blowers, yard carts, and accessories. Rockwell Tools is a line of power tools and hand tools that consists of products like circular saws, drills, angle grinders, and specialty tools like the oscillating SoniCrafter and the Jawhorse clamping device. In 2010, retailer Lowe's honored Positec with the Supplier of the Year Award. Lowe's also named Positec the "Innovator of the Year" among their 2,500 other suppliers. The company's WORX GT lawn trimmer also received an award from the U.S. Electronic Retailing Association in