Seco-Larm E-931-S35RRQ Enforcer Indoor/Outdoor Wall Mounted Photoelectric Beam Sensor with 35 Foot Range

The wiring is different for all models, but a brief google search will help you figure it out. I have a co-z opener and found instructions quickly.

I'm an electrician and hobbyist. I wanted a doorbell for my dog. I bought a few different touch sensors, but nothing seemed to be both trainable and weatherproof. This laser is perfect. I added a Honeywell magnetic door switch to switch off the ding-dong'ing while walking out the door. However, the sensor input is not rated for 16 VAC and the magnetic switch is not rated for the 2-3 amps sometimes pulled by a doorbell. I used a multi-tap transformer as used on a furnace and have separate voltages running through the setup. 24 VAC @ 135 mA runs through the magnetic switch, cutting power to the sensor. 16 VAC runs through the relay, controlling the bell. After 4 years, I began having a continuous nuisance trip of the bell. I later realized my custom mounting had gotten loose. I adjusted it back and the bell is working again. However, the polycarbonate lenses are yellowing and the strength of the sensing is less than when new. As a failsafe, I plan on adding a multifunction timer to prevent the bell from grinding on for more than 5 seconds as letting this go on for hours unattended would definitely burn up the bell.

The unit was bought as a direct replacement for an existing one, operating a motorized exterior door, since it was installed without a protection from the rain, preventing water could go through the adjusting screw and the adjustment access upwards, instead of protecting it through a sideways installation. There is a factory installed o-ring preventing water from damaging the unit, but it doesn't guarantee a full water ingress. Therefore, a cover has been added to the replacement, protecting it against rain and extending its useful life. Complete installation instructions make the installation fairly easy. Other than this inconvenience, it works as intended.

These work great, but eventually wear out when used outside. Granted, Texas weather is tough on everything. But we get a few years out of there. We are on our 3rd or 4th.Would also like a larger reflector, as aiming across 30ft or so is tricky.

Tested it indoors at up to 16m and it was working reliably, I ran out of more distance to test. But in the end I installed it for my swinging gate outdoors which is only about 6m and it was a breeze. Saved me from the hassle of replacing the old sensor’s batteries every few weeks.I have to say the reflector is pretty small (about the size of 3 fingers) so aiming is challenging but not too hard. Power the sensor, hold the reflector in your hand right in front of it, then slowly move to the other side while making the necessary adjustments and it should be fairly easy and quick.

Wired this into my konnected smart alarm to notify me when the pizza guy walked up the drive. I love it. No more surprises. If the cops come up the drive I have time to hit the back door and over the fence before they realize I'm gone.

So I use this for when I park my car in the garage. We don't have a lot of room, so I want to make sure I don't back in further than I need to. With this, I'm able to set it up so I back in perfectly, every time, down to the inch. It's very handy. And I love that I could put a 12v power supply on it would work. It says that it works with 120v AC too! Coolio. But I wanted to just have an LED go on and off, so the 12v DC power supply is fine.

These Seco-Larm E-931-S35RRQ Enforcer Indoor/Outdoor Wall Mounted Photoelectric Beam Sensor are listed to work on 12~240VDC / 24~240VAC and have a relay contact with a one amp max rating. I purchased 2 of these to use to turn on a light when the beam was broken and connected them to 120 VAC for both the power for the sensor and the relay contact for my indicator light. My installation was well within the specifications of the sensor.The sensor failed to turn on the indicator light about 40% of the time. For my purposes this isn't nearly good enough.I had purchased 2 of these and tried both and had the same problem with both. i called the seller and was told that they was surprised that i was trying to run this sensor on 120 vac, and that they were intended for a gate application that powered them on dc. I tested the sensors and found that even if I powered the sensor using 12vdc and powered the contact in the relay with 120vac there was a 10% chance the relay wouldn't turn on the indicator light.I finally resigned the circuit using 12vdc to power the contact and power the indicator light through the relay contact and the sensor works very well.I would have chosen a different sensor If I had known that it wouldn't work and 120vac.