Your answer depends on the subject being measured. Out of doors, one would choose an instrument that survives in the extreme cold, and delivers data in the measuring system required.
Without endorsement, you can review the different types of thermometers below:
http://www.atp-instruments.co.uk/different-types-of-thermometer
The answer used to be AA alchohol thermometer, but these days I would recommend a digital thermometer.
dial thermometer
You would use some type of thermometer.
You would use a thermometer to measure your temperature.
I would use a thermometer.
Meteorologists.
Use a regular thermometer to test your body (or a child's body) for fever. Use a meat thermometer when cooking meat, and an outdoor thermometer to check the weather outside.
Clinical thermometer
Temperature is measured by means of a thermometer. Various types exist, and scientists would use the type that best suits their particular experiment or project.
You would use both to determine the relative humidity.
Temperature major through a thermometer, one is contact type thermometer another one non contact type.Non contact type thermometer known as laser thermometer. With non contact type thermometer or leaser thermometer you will read out temperature from a particular long distance without contact the particular point which temperature want to know.Contact type thermometers are glass type thermometers, analogue or digital read out type. Digital thermometer and analogue dial read out type thermometer have a sensor and that sensors must be to touch hot or cold point to read the temperature.Best use of contact type thermometer is uses full in a closed area. To know grill temperature of a slip Air Condition best use nonContact thermometer to read exact temperature.
to check the temperature
Mercury and alcohol [liquid elements]