Last night, I installed an Aeon Labs Recessed Door Sensor
This sensor is a two part device, the sensor itself and the magnet. The sensor is a cylinder just under 3/4 inch wide and about 3 inches long. The magnet is similar, but shorter at maybe 3/4 inch. To install, a hole is bored into your doorframe for the sensor and another into your door for the magnet.
The first thing I did was pair it with my ST V2 hub. I opened the sensor as per the instructions, took the circuit board out of the plastic housing and pulled out the plastic tab so the battery could make contact and turn the sensor in. I put the circuit board back in, told my hub to find things and pushed the little button on the sensor. About 7 seconds later ST found it.
You definitely want to pair it before you install it. First, you want to make sure the sensor is not defective. Second, it’s much easier. Finally, you may need to be close to the hub to pair, and it’s a lot easier to bring the sensor to the hub than it is to bring the hub to the sensor.
Installation was relatively easy, and there are a few considerations.
First, I used a 3/4 inch (not 10mm as the instructions said) boring bit. That was fine. 3/4 inch makes for a nice fit. As to it being a wood boring bit, had the doorframe and whatever was behind it been solid wood this would have been the perfect choice. But, after about 1.5 inches I punched through to a void about half an inch wide. That made continuing to bore the hole in proper alignment with the existing hole difficult. I may have been better served by a paddle bit.
Next, the instructions call for a 1mm (0.02 inch) to 5mm (0.2 or 13/64 inches) gap between the sensor and the magnet when the door is closed. That seems easy enough, until you realize that the magnet and the sensor mounting plate do not sit perfectly flush with the door or the door frame. In reality, the gap you need is much wider. My door was installed badly so I had a wide gap near the top, and still it was just barely wide enough.
So, in the case of the magnet consider widening the very top of the 3/4 inch hole just deep enough to recess the magnet. This is easily done with a paddle bit wider than 3/4 inches because the hole you bored will have a center dimple you can use to align the wider bit.
As for sensor, that’s tricky. You could make a rectangular cutout around the mounting hole to recess the mounting plate.
Once your holes are bored just insert the sensor and magnet. The sensor is secured with two small wood screws and, of course, I lost one.
Done with the physical installation!
There has been a lot of discussion about mounting the sensor in a steel door. I suspect that pretty much any door will have a place along the top or side of the frame where the sensor could be mounted, making installation inside the door unnecessary.
Although the sensor seemed to work with the default ST device handler, there is a community provided handler here that I used:
See the discussion in the thread about why this device handler is preferable.
The look of this sensor is much nicer than the sensors that mount above the door and need a magnet on the door, but it’s not completely hidden. There is a red light that glows occasionally to indicate Z-Wave communication and you’ll see that. Not that this is a problem, just wanted to mention it.