1) Thermometer 
• (n.) An apparatus for determining the temperature of a distant point, as by a thermoelectric circuit or otherwise.
Tel`e·ther·mom'e·ter noun [ Greek ... far off + English thermometer .] (Physics) An apparatus for determining the temperature of a distant point, as by a thermoelectric circuit or otherwise. 
[n] - a thermometer that registers the temperature at some distant point
telethermometer 1. Any of various thermometers that indicate or record temperatures at a distance, usually by means of an electric current. 2. An apparatus for determining temperature on which the reading is made at a distance from the object or subject being studied.
noun a thermometer that registers the temperature at some distant point