A resistive sensor is a type of sensor that measures changes in resistance to detect physical quantities such as pressure, temperature, or displacement. When an external force is applied, the resistance of the sensor material changes, which can be converted into an electrical signal for further analysis. These sensors are commonly used in various applications, including temperature measurement, pressure sensing, and position detection. They are often made from materials like carbon or metallic films, which exhibit predictable changes in resistance, making them reliable for monitoring and control systems in industries and everyday devices.