The control on an oven and a thermometer.
Typically, a light meter. However, some may require the use of a color temperature meter as well.
Thermometer
Set it on fire and use an infared temperature meter to see the results.
Celsius, kelvin, Fahrenheit
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Meter, centimeter, or millimeter.
Using a calibrated pH-meter with correction for temperature and slope.
It's kind of difficult to use it to measure things that are not straight, or that are longer than 1 meter.
We commonly use two temperature scales in daily life: Celsius and Fahrenheit. Celsius is widely used in most countries for everyday weather reports and cooking, while Fahrenheit is primarily used in the United States. Both scales measure ambient temperature, but they have different reference points for freezing and boiling water. In scientific contexts, the Kelvin scale is also used, particularly in physics and chemistry.
a degree
it principle denpend on what kind of flow meter. example, magnetic flow meter, it use magnetic force to measuring or coriolis flow meter which is use vibrated capilary tube as sensor. or more info you might watch on youtube.
it's called get on it