Thermometers are intended for temperature measurement in both industrial and household applica- tions. Thermometer long lifetime is ensured by robust construction. Capillary thermometers and mano- meters are intended for applications where point of measurement is distant from display position.
Technical thermometers are intended for direct measurement of temperature in almost all industrial spheres. A typical examples of usage are the boilers, engine rooms, central heating systems, etc.
The main advantage of capillary thermometers and manometers is the possibility of placing the sensor regardless of the head position. Frequently used in boilers, etc.
Temperature indicator are intended for determination of approximate temperature in applications like temperature measurement in hot air oven or boiler shell.
If you want to measure the tempe- rature in your home or workplace, does not matter if internal or external. Another usage is e.g. temperature measurement in the sauna, when making compotes or at barbecue.