Temperature indicators are installation instruments which can process signals from temperature sensors and show them on the display. Temperature indicators to process signals from temperature sensors and show them in the display.Temperature indicators enable easy and economic valuation of resistance sensors, such as Pt100 or different thermo element types. These sensors can be directly connected to temperature indicators to avoid the installation of a transducer. Some temperature indicators can only be used with certain sensors. Such temperature indicators are the ideal instruments due to its affordable price. Universal temperature indicators are very flexible devices because they can be used with many different temperature sensors and can also process normalized signals. Many temperature indicators have a relay output to set diverse alarms when a limit value is exceeded.