Motion Sensors - Relay "Click"?

[SteveInNorCal]

Do motion sensors / detectors (for security) make relay clicking noises? My wiring installer put one in my LR and one in the hallway. I added a third to the DR/Kitchen (I don't see the brand name on the front). Are the relays going to make audible clicks every time somebody moves into the field of view? I haven't fired them up yet, so don't know what I'm in for. I don't like the idea of sitting down to read a book and having the detector click every time I turn a page or wiggle in my chair.

I've read good things on this forum about the Bosch ISC-BDL2-WP12G Blue Line Gen 2 Tritech which is supposed to have good pet immunity (I believe the BDL2 replaced the DS83i). Prices are pretty reasonable for this detector. BUT, does it make clicking noises?

I recall reading about some detector that uses solid state relays and is totally silent. Anybody know which ones are great sensors, pet immune, AND completely silent?

Steve

 

[chrisexv6]

I can vouch for the ds835i being silent

I would guess the blue line would be too if it's a newer replacement

My in laws have an ancient alarm setup and one of their motions does make a clicking noise. Keep in mind this is a system from the 70s so everything in it is old tech.

 

[newalarm]

I also remember some older units clicking.

I have installed the Bosch ISC-BDL2-WP12G Blue Line Gen 2. They are beautiful units, very small and absolutely silent. The only thing that may disturb you is the LED that come one everytime you move. I believe you can also turn those off, but it is good to be reminded that the alarm is working, and remind visitors that your system is operational.

 

[Del91574]

The 835I's do have a slight relay click, not very noticable.

The newer Blue lines are solid state relay, no noise.

The LED's surve more purposes on the Bosch units. Each color represents a detection technology. If one fails, the units go into "3 flash" mode to alert there's an issue by flashing the LED 3 times.

 

[SteveInNorCal]

The 835I's do have a slight relay click, not very noticable.

The newer Blue lines are solid state relay, no noise.

The LED's surve more purposes on the Bosch units. Each color represents a detection technology. If one fails, the units go into "3 flash" mode to alert there's an issue by flashing the LED 3 times.

Thanks, Newalarm and DEL. That was just what I needed to know. I ordered three Bosch ISC-BDL2-WP12G Blue Line Gen 2 yesterday.

 

[newalarm]

You will like it, but You may want to look at their site; they have a motion for every possible scenario. you want to make sure you get right unit for your location. I tried that unit is a square hallway at top of the stairs and it was not picking up motion due the the blind spot. I swaped it for a different Bosch and now it works perfect.

Now the WP12G does have a mask (foil) that you can pull off if you need better coverage, but once you pull it, i don't think you can put it back. It also have two internal switches, one to turn off pet friendly, and one to turn off LED.