The term measurement technology includes devices, which measure different physical dimensions. This includes, for example, length, mass, force, pressure, electric current, temperature or time. Larger groups in the category of measuring technology are testers and test equipment as well as environmental and power measuring instruments. Test devices are particularly important in electrical installation work and the repair of electrical equipment in order to check cables and components for their correct function. The air quality in buildings can also be checked using appropriate measuring devices. A high proportion of hazardous gases can be detected at an early stage and rectified. Oscilloscopes are among the most important types of measuring equipment; they are used to observe the change of an electrical signal over time, which is displayed on a screen. Measurement technology is found in many areas such as in laboratories, on construction sites, in training institutions or in industrial production.