How to build an optical/light barrier with the Arduino, the Keyes laser module (KY-008) and a laser receiver/detector module - Michael Schoeffler
STABILA REC 300 Digital rotating laser receiver with bracket. Easily to read digital display show precise distance from grade in fractions or decimal display. - STABILA Messgeräte Gustav Ullrich GmbH (EN-US)
LR 6 Laser Receiver | Bosch Professional
Maxiline Digital Reading Laser Receiver for Red Beam Rotary Laser Level
La708 Laser Receiver and La998 Control Box (LA708/LA998) - China 360 Degree Receiver, Control Box | Made-in-China.com
Spectra Precision HL700 Laserometer Laser Receiver with Rod Bracket - Contractors-Tools.com
LASER Receiver Module | Makers Electronics
Digital mm Laser Receiver | Red & Green | Hitechniques
Laser receiver for exavator - accurate depth control with every laser transmitter | Moba Plattform
Universal laser receiver ADA LASER MARKER 70 (for green and red beam) - ADA Instruments
STABILA REC 500 RG rotation and line receiver for locating red or green laser beams - STABILA Messgeräte Gustav Ullrich GmbH (EN)
Receiver for Laser Diode | Open ImpulseOpen Impulse