A thermostat or more carefully with a thermometer.
Thermostats
The temperature inside of an oven is a measure of the degree of hotness or coldness of its internal environment (corresponding to its molecular activity).
Air Probe.
If you ever want to measure a temperature above 212 degrees, you're better off hanging the thermometer into the air in the oven. Since it's a hot-air oven, you want to measure the air. If it were a hot-water oven, you might prefer to measure water. But even then, what are you gonna do above 212, when the water goes away and all you have in there is steam ??
Uhhh... A thermometer...
The instrument that is needed to measure the temperature of the water is called an "Aquarium Thermometer".
You have not specified your question well enough. If you're looking for their general comparisons, here they are: Gas Oven Temperature vs Electrical Oven Temperature # Gas oven temperature can vary slightly more than electrical oven's. # When certain holes in a gas oven is is clogged with oil, they may cause explosion. # Electrical oven's temperature can be more uniform.
The answer depends on which gauge you are asking about: if it is a thermometer, it could be used to measure the oven temperature. If it is part of a clock/programmer, it tells the time of day and can be used to switch the oven on and off automatically.
Altitude should not affect oven temperature but it will affect how much your baked goods will rise in the oven. It is always a good idea to have an oven thermometer in your oven to make sure that the oven is calibrated properly.
For temperature times with a fan oven, you need to subtract about 10 degrees from the conventional oven time given. So, for 160 degrees F in a conventional oven, you would set a fan oven at 150 degrees F.
The oven doesn't heat up. The air inside stays at room temperature (although that would be difficult to measure). What heats up is the substances you place in the oven that absorb 2.5 GHz radio energy effectively ... mostly water and fats in foods.
an oven
Temperature.