Definition

Noun: A thermojunction is a point of contact between two different types of metal. This junction produces a small, measurable voltage when there is a difference in temperature between the junction and the other ends of the metals.

Usage

A thermojunction is the fundamental component within a thermocouple, a device used to measure temperature. The voltage generated at the thermojunction is directly related to the temperature difference.

Examples

• The scientist carefully calibrated the thermojunction to ensure accurate temperature readings.
• A voltage appears across the thermojunction when it is heated.
• The accuracy of the sensor depends on the materials used to create the thermojunction.

Advanced Usage

• Multiple Junctions: In a practical thermocouple circuit, there are at least two thermojunctions: a (hot junction) and a (cold junction). The voltage measured is proportional to the temperature between these two junctions.

Variants and Related Words

• Thermocouple (n): A temperature sensor consisting of two dissimilar metal wires joined at a thermojunction.
• Seebeck effect (n): The physical principle that describes how a temperature difference across a thermojunction creates a voltage.
• Junction (n): A point where two or more things are joined. In electronics, this often refers to a contact between different materials (e.g., p-n junction, thermojunction).

Synonyms

• Thermoelectric junction
• Thermocouple junction

Noun

1. a junction between two dissimilar metals across which a voltage appears