IP67 Waterproof Universal 10-30VDC Safety Retro-Reflective Photoelectric Beam Sensor for 12VDC and 24VDC Gate Opener, Garage Door Sensor Up to 40 Feet Sensing Range, Pre-Wired 6.6 Feet Cord

Used this to prevent 16’ wide garage door from closing when suv hatch is open. Used info from a previous review but changed the power source. I used a 120 vac to 12 vdc plug in transformer. Wired the normally closed yellow and white to the garage sensor wire that has the black side stripe. Cut that wire and connected the yellow and white to each end of the cut sensor wire. I mounted the transmitter 70” off the floor so it is above eye level due to brightness. Works perfectly. Also, if there is a problem, all I have to do is unplug the transformer and it is like it not doing anything since the relay contacts are normally closed in the no power mode. PS: I added a magnetic reed switch with NC and NO contacts at the door half open position to turn on beam power. The beam is only on when the door is open. When it closes, the power to the optical sensor is off. The optical sensor takes 30 to 70 milliamperes and the switch is rated at 500 millamperers.

Very Happy with the results

EDIT: This just paid for itself, and more. I installed it in August 2024. Today 1/1/2025, for the first time, it save me from closing my garage door onto the open hatch. If I could increase my rating to 6 stars, I would. I bought this Retro-Reflective Photoelectric Beam Sensor to add a SUV hatch sensor to my Genie garage door opener. The opener has the “Save-T-Beam” system where the Source and Sensor both have 2 wires and are connected in parallel to the opener. The new sensor requires connection to specific + and – DC voltage wires while the Safe-T-Beam system does not. So, I needed to use a voltmeter to identify the correct polarity. The attached picture shows how I wired it. How it works – The 12V DC is picked up using the Blue & Brown wires. The “OK” signal is disconnected if the new beam is interrupted by the SUV hatch. The original sensor at the floor operates just as it always has. I can’t guarantee it, but it seems that the same principle would work with other brands/types as well – you just need to understand where to interrupt the “OK” signal.

Estoy muy contento con el producto la calidad y el envío rápido fue magnífico , gracias

I tried a cheaper ($20) one for my project but it did not properly sense a broken beam. It would see the reflection from my truck as if it were from the supplied reflector. True to the description I don’t have a false reflection issue with this one. The project you ask? This is mounted at bumper level on my garage door rail. When the beam breaks, a small led light bar illuminates. Once I am clear of the door, ie the vehicle is ‘in’, the light turns off. I am able to park just inside the garage door, not too deep in the garage and with no concern the closing door will hit my bumper.