This is a mount for the Sharp GP2Y0A710K0F. It's a Distance Measuring Sensor Unit with a range of 100 to 550 cm and a non-linear analog output.It takes approximately 1 hour to do a normal quality print with just over 1m of PLA (Ultimaker2). It can swing 160 degrees.This is the datasheet: http://www.sharpsma.com/webfm_send/1490The sensor is the largest in the family and the output signal is a bit noisy, so I used the excellent Median filter from Jeroen to calm it down a bit.http://jeroendoggen.github.io/Arduino-signal-filtering-library/Also, getting the correct voltage to cm formula is a bit annoying. Below is what I ended up with (for Arduino) after graphing output numbers in Excel. It probably differs slightly per sensor and power supply.http://codepad.org/HwjquVmCenjoy!