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
Sensation Lawn Mowers was bought by Gilson Brothers, which is considered one of the founding industries of Wisconsin by researchers at the University of Wisconsin. Gilson Brothers' products were distinctive due to a bright orange and white color scheme. In 1988 Gilson was bought out by Lawnboy, which was acquired in 1989 by Toro. Sensation brand lawn mowers are no longer produced but are still in use today. Mowers were available with the Sensation brand into the 1980s. The Sensation brand was preferred by many landscapers because to their perceived high-quality and apparent longevity. The mower was considered unique because of features such