Biometric sensors are devices that measure and analyze unique physical or behavioral characteristics of individuals. Common examples include fingerprint scanners, facial recognition systems, and iris scanners. These sensors convert biological traits into digital data, allowing for secure identification and authentication. These technologies are widely used in various applications, such as smartphones, security systems, and financial transactions. By relying on unique personal features, biometric sensors enhance security and convenience, making it harder for unauthorized users to gain access to sensitive information or areas.