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
Elec-Trak electric trimmers, edgers, chainsaws, radios, arc welders, fork lifts, front-end loaders, rotary brooms, roller aerators, lawn rollers, dump carts, large vacuums, agricultural sprayers, moldboard plows, row crop cultivators, tillers, disk harrows, sickle bar mowers, belly mowers, front-mounted rotary mowers, front or rear-mounted ganged reel mowers, lawn sweepers, electric rakes, snowblowers, snowplows, golf bag holders, double seats, 120vac rotary inverters, canopy tops, and more. Most of these attachments were connected by a 36VDC "power take off" using a NEMA 10-50 outlet, usually used in the U.S. for 240VAC clothes dryers and thus compatible with readily available cords in most of the