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
Lawn cloth linen lawn. Lawn cloth commonly is used for infant wear, handkerchiefs. dresses, blouses, aprons and curtains. Other uses are nightwear, underwear, lingerie, collar cuffs and shirting. It is also commonly used in vestments in Anglican churches, such as the surplice and episcopal rochet. Lawn cloth Lawn cloth or lawn is a fine plain weave textile, now chiefly of cotton. Terms also used include batiste and nainsook. Originally the name applied to plain weave linen, and linen lawn is also called "handkerchief linen". Lawn is designed using fine, high-thread-count yarns, which results in a silky, untextured feel. The fabric is made