The RDC501051A is an industrial motion and position sensor 5V 30% made by ALPS. It is a Hall effect type sensor, meaning that it responds to a magne-tic field to provide an output voltage proportional to the field strength. This sensor also has a built-in amplifier that amplifies the low-freguency signal from the magnetic field and outputs a high frequency square wave signal. It has a built-in output current limiter to protect the unit from excess output current. It is suitable for applications in systems with a DC voltage of 5V and a response time of 30%. It is also designed to be very immune to interference from other nearby sources. It is a rugged, reliable and accurate solution for industrial motion and position sensing applications.