Ear thermometers measure eardrum temperature using infrared sensors. Home weather stations include hygrometers, thermometers, barographs, and barometers. Products containing mercury include&colon; auto parts, batteries, fluorescent bulbs, medical products, thermometers, and thermostats. Related equipment, although not strictly thermometers, include infrared scanning systems and infrared thermal imaging cameras. Resistance thermometers and thermistors are generally used in two ways. This includes tympanic infrared thermometers in children. Temperature taking fetish is a sexual fetish for oral thermometers and rectal thermometers. Clocks may have other features such as indoor thermometers and weather station functionality. Infrared thermometers are a subset of devices known as "thermal radiation thermometers". This alloy is used in thermometers and low-temperature switches. Paraffin oil is commonly used to fill Galileo thermometers. They include relatively simple laboratory equipment like scales, rulers, chronometers, thermometers, etc. She used an air pump, four mercury thermometers, and two glass cylinders. It is used in some thermometers, especially ones which are used to measure high temperatures. Triple-point cells are used in the calibration of thermometers.