Seco-Larm Enforcer E-964-S50TB Multi-Frequency Single Photobeam Sensor - 50 Ft

If you are handy or knowledgeable this is the ticket.This device is intended for someone with a little electrical or electronics background or just plain handy about gadgets. The description nowhere reads that it is a "Plug & Play" device. It is an interface device designed to be linked to an alarm horn, Flashing light or used to detect an object or person interrupting the beam to activate an alarm or stop a device such as stopping a garage door from closing on your vehicle or a person/child or can be used to turn on driveway path lights etc. There thousands of useful possibilities to use this photo beam sensor on.

The media could not be loaded. Replaced FAAC with these. They came right online without issue. Be sure to place jumper in to NC (normally closed) position for this gate safety application. $28 for one side is a damn good value.Update: I liked the price of the unit in the ease of operation. However in my gate use application it lasted less than 90 days. I reached out directly to the manufacture and said the one of them burned up and I could smell it. They responded requesting more detail which we provided. Yet we never heard back from them again. Clearly this point I would suggest a better quality item for more money that will last more than 90 days

Like the other reviewer, I wanted to make sure my car won’t be hit by the garage door. Unlike him, I did not modify my current safety sensors with the relay output, but put an arrow LED on the wall that lights up if the car is not backed up enough. The reason I did not want to mess around with current sensors is if this product fails, I don’t have to worry about it changing the behavior of the original safety sensors.I did not put blue tapes on the lenses to make the beam narrower, but instead I rotated the hinges of the transmitter to about 40 degrees towards the inside of the garage. It made the beam narrower on the receiver side coming from sides of the transmitter lens. As other reviewer mentioned, the beam is quite wide for short distances like a two car garage. I also used aluminum DIN brackets on the wall so later I can move receiver and transmitter up or down based on any car or truck’s bumper height.I also like to point out that only the receiver has the relay output. Transmitter cannot control anything. It just has power. To open the black cover, put a flat screw driver on the slot on the bottom of the black cover not on the back. It looks like a small vent on the bottom. It took me 10 minutes to figure that out!Overall, it allows us to park the car 1-2 inches from the door which is perfect since we have cabinets in the back wall and this gives us as much space as is physically possible to walk behind the car. Thanks for reading, and YMMV.

These work well as an entry beam for perimeter security. ( across a deck, porch or driveway)Short distances ( up to 15 feet) are easy to eyeball & align. 25 - 50 feet is hard unless you have good reference point from surrounding building / structure. 50+ feet, you need a unit with laser to align.

Completely useless for me.1) "4 selectable frequencies to reduce interference" may reduce interference, but that does not mean they can be used pointing in the same direction. Interference between two sensors causes both to trip and not respond reliably.2) At 25' across and 8" above our deck, a single sensor did not trip reliably when walking between the sensor and transmittor. It works close to the sensor or emitter, but not in the middle. I must be getting some bounce off the deck. They recommend at least 8", but you may want to raise them if possible.3) The delay after un-tripping the alarm is almost a second. Way too long for my purpose.

Put this beam across a 16' garage door opening (for when we leave the door open and want an alarm if something enters) but we got alarms when the morning sun came in through the open door. So replaced them with Seco-Larm E-931-S45RRQ Retro-Reflective Photoelectric Beam Sensor which works reliably like a champ. So I've learned to use retro-reflector beams for short distances, the big and reliable Seco-larm twin photobeams for longer distances, and never to use these single photobeams.

Bought a second set, for back yard area. Lets me know when Kitty cat is at patio door & wants to come in ! She's a lucky kitty ! ----------Robert

I used this item as the sensor for a parking system I crafted to allow me to park any of our three cars within 2" of our two garage doors. I wanted to maximize the space in front of the cars to allow more room for cabinet and workbench access, so being able to park just far enough inside to safely close the doors was the objective. The other circuitry and indicator lights aside, the system depends upon reliably determining when a car has cleared the door location, and these work well over that 27' distance.Why four stars vs five? Only because the normally open relay inside the receiver takes a little longer to re-open once the beam is reestablished. The rely closes almost instantaneously when the beam is interrupted; but it takes a noticeable amount of time to open. It's not a huge problem, but it would be nice if the response time was a bit quicker.