– Gebildet 3 sets Black Magnetic Switch Wiring NO/NC Recessed Door Sensor Hidden Window Contact Reed Switch for Access Control Replace Alarm System

Tested all OK on receipt, as others not, operation is quite close (~5mm). Bought nc/no as description of others ambiguous

I brought these wondering if I would ever use them. Long story short, they work like a dream

Arrived with only the switches and no magnets making this useless. Also has a blob of solder on one of the switch cables so clearly this has been used, then returned without the full package and resold.

Well, they work. As for a range of about 10-15mm, that’s highly optimistic. The best range I could get from all three, was about 4mm. So, providing whatever you’re using them for is almost touching, you’ll be fine. Anything more than 4mm, no chance.

I bought these for operating some 12v LED strip lighting in a wardrobe, so the light comes on when the door is opened. I first did a test on each by switch by holding it close to my ear and bringing the magnet close; only one of them made a click sound the others were silent. I also tested them with a resistance meter and the only reliable one was the one that had clicked. The others were occasionally able to switch when bringing the magnets close but not often, even when the magnet was touching. I was therefore only able to use the one unit from the pack of three. I returned the faulty units and happily received a full refund from Amazon. However I certainly wouldn't recommend these, particularly for a burglar alarm situation unless they were thoroughly checked and sufficient quantity bought to ensure the required yeild.

Very poor magnet range, the magnet has to be almost in contact with the reed switch to make these work and even then mounting in any position other than flat next to each other will not operate the switch Very disappointed and ended up using something different

The reliability seems does not match with my expectation. I have connected with a lamp@49mA, the switch doesn't not work anymore after 2 to 3 open and close. Really frustrated and disappointed with this product.

Fast delivery, works just as advertised; Perfect.