The document describes an automatic hand sanitizer dispenser that uses non-contact sensors and Arduino technology to dispense sanitizer without users having to touch the device. The system uses an ultrasonic sensor and Arduino microcontroller to detect hands and trigger a relay and pump motor to dispense sanitizer contactlessly. This aims to help limit the spread of viruses like COVID-19 by avoiding contact-based dispensing methods. A block diagram shows the key components including the Arduino, ultrasonic sensor, LCD display, relay, pump motor and power supply.