The C7339 Position Sensor is an opto-electric positionsensing unit which measures the position of a single point of light spot-focused onto the sensor head. The use of hybrid circuitry allows for a compact, lightweight design and a divided configuration with a light, compact sensor head and a controller equipped with a light level indicator and data displays for ease of operation. The measured position is displayed digitally in terms of X- and Y-coordinate voltages on the front panel of the controller and may be simultaneously output to a recorder. The C7339 does not possess a background-light cancellation function and is suited for use in locations where the signal light is distinct from the background such as in the detection of laser beams.