Keyence Laser Sensor LV-NH62 &  stainless steel Mounting Bracket 

LV-NH62 Small Beam Spot Retro-Reflective

The LV-NH62 features not only a straight beam but also a single-lens structure by combining together the transmitter and receiver. This eliminates variation in the detection point, enabling detection equivalent to thrubeam type sensors.

Spot Diameter of Only 1.5 mm At a Distance of Up to 1 Metre.

As per pics
Additional information
Chris
International, Scottish highlands + Islands & Ireland please check P&P with me first