The NTC resistor with Cobra SMARTsense

Principle

The students already know that metallic conductors have a resistance that increases as the temperature rises. Now they should recognise the opposite behaviour of NTC resistors (Negative Temperature Coefficient), whose resistance decreases when heated. The experiment consists of two parts: Part 1 (self-heating) serves as an introduction, part 2 (external heating) as a confirmation experiment. 

Tasks

• Investigate the relationship between temperature and resistance in an NTC resistor.

Learning objectives

Using the experiment, learners recognise how an NTC resistor works.

Benefits

• No additional cable connections required between the components - clearer and faster assembly
• Contact reliability thanks to interlocking components
• Hard gold-plated, corrosion-resistant contacts
• Double learning success: electrical circuit diagram visible on the top and real components on the bottom