Sick: Short range distance sensor | Packaging World
TOF Single Point Laser Radar Module Low Power Consumption Short-range Distance Sensor Module 0.2M~8M UART IIC 5V
Sharp GP2Y0D805Z0F Digital Distance Sensor with Pololu Carrier [0.5 cm to 5 cm] : ID 3025 : $11.95 : Adafruit Industries, Unique & fun DIY electronics and kits