The small size and the unique casing allows it to be used anywhere standing or hanging on a wall.
It is truly portable and does not need any external connections.
The TT202 is a mechanical recorder that has a fixed internal sensor, and will record the temperature of where it stands.
Temperature Technology | Temperature Measurement Instruments
Temperature Technology manufacture and import a selected range of instruments for measuring and monitoring of temperature and related physical quantities, pH, mA, RH.
These include thermometers, ...