What is the main difference between a thermometer and a temperature probe?(1 point)
The thermometer reads out visually while most, if not all, temperature probes read out electrically.
The main difference between a thermometer and a temperature probe is the way they measure temperature.
A thermometer is a device used to measure temperature and consists of a glass bulb filled with a liquid, typically mercury or alcohol, that expands or contracts with changes in temperature and moves up or down a calibrated scale. To get the temperature reading, you simply place the bulb in the substance to be measured, wait for a few moments, and read the temperature on the scale.
On the other hand, a temperature probe, also known as a thermocouple or temperature sensor, is an electronic device that directly measures temperature using the principle of thermoelectric effect. It consists of two different metals joined together at one end, called the hot junction, and connected to a measuring instrument at the other end. When the hot junction is exposed to a temperature change, it generates a voltage that is proportional to the temperature difference. This voltage is then converted into a temperature reading by the measuring instrument.
In summary, the main difference is that a thermometer uses a liquid-filled bulb and a scale to measure temperature, while a temperature probe uses a thermocouple or temperature sensor to directly measure temperature and provides an electronic output.
The main difference between a thermometer and a temperature probe is their design and functionality.
1. Thermometer: A thermometer is a device used for measuring temperature. It usually consists of a glass tube filled with a liquid (such as mercury or alcohol) that expands or contracts according to temperature changes. The liquid level indicates the temperature on a scale. Thermometers are generally handheld and used for measuring the temperature of air, liquids, or surfaces.
2. Temperature Probe: A temperature probe, on the other hand, is a sensor used to directly measure temperature. It usually consists of a metal or semiconductor probe that detects temperature changes and converts them into electrical signals. Temperature probes are connected to electronic devices, such as thermometers or data loggers, to measure and record temperature accurately. They often come with a variety of probe types, such as penetration probes for food or immersion probes for liquids.
In summary, while both a thermometer and a temperature probe are used to measure temperature, a thermometer is a complete device with a built-in temperature sensor and a scale, while a temperature probe is a sensor that needs to be connected to an electronic device for temperature measurement and recording.