5 Sets Magnetic Contacts Wired Window Door Contact Sensor Magnetic Reed Switch NC Surface Mounted Alarm Switch Sensor
$8.99
This Magnetic Reed Switch, made of ABS material, is a NC/ normally closed type switch with screws for intrusion detectors for door and window switches
Switch Type:NC means normally closed, when the magnet together, the circuit is conductive( light on ); when the magnet separate, the circuit is not conductive ( light off ).
Function : Usually when the door and window are closed, the switch contact is affected by the magnetic field to form a conducting state; When the door and window are illegally opened, the magnet is far away from the switch, the switch contact is disconnected, that is, the alarm is triggered.
Product composition: The door magnetic switch is an intrusion detector used to detect the door and window switch in the anti-theft system, which is composed of reed tube switch and magnet. 4.Installation environment: can be used for industrial equipment and household appliances, during the installation process, do not knock, to avoid damage to the internal components, the magnet part and the switch part should be parallel aligned, good position.
Installation environment: can be used for industrial equipment and household appliances, during the installation process, do not knock, to avoid damage to the internal components, the magnet part and the switch part should be parallel aligned, good position.
Install Distance ：Gap between 2 pieces more than 20mm
8 reviews for 5 Sets Magnetic Contacts Wired Window Door Contact Sensor Magnetic Reed Switch NC Surface Mounted Alarm Switch Sensor
MAECENAS IACULIS
Vestibulum curae torquent diam diam commodo parturient penatibus nunc dui adipiscing convallis bulum parturient suspendisse parturient a.Parturient in parturient scelerisque nibh lectus quam a natoque adipiscing a vestibulum hendrerit et pharetra fames nunc natoque dui.
ADIPISCING CONVALLIS BULUM
- Vestibulum penatibus nunc dui adipiscing convallis bulum parturient suspendisse.
- Abitur parturient praesent lectus quam a natoque adipiscing a vestibulum hendre.
- Diam parturient dictumst parturient scelerisque nibh lectus.
Scelerisque adipiscing bibendum sem vestibulum et in a a a purus lectus faucibus lobortis tincidunt purus lectus nisl class eros.Condimentum a et ullamcorper dictumst mus et tristique elementum nam inceptos hac parturient scelerisque vestibulum amet elit ut volutpat.
Greg Metzler –
Well made.
Work as advertised. I would buy again.
Vine Customer –
Easy installation provides peace of mind with effective security monitoring.
WESUA Magnetic Contacts Wired Window Door Sensor This set of magnetic contacts is effective for enhancing home security by monitoring window and door openings. The surface-mounted design makes installation a breeze, ensuring reliable performance for alarm systems
Apex2Nine –
Seriously?
The magnets don’t seem to be strong enough to make the sensor actuate.
Francis –
Better than wireless systems
* Installation isn’t too difficult* More durable than wireless* Less maintenance than wireless* Good valueThese are harder to install than wireless sensors but have less maintenance and are more secure. No need to change batteries like with wireless systems. I prefer the wired internal reed switches wherever I can install them but wired external are a close second. Wired sensors are less likely to be tampered with. They can’t be jammed like wireless sensors. With wireless tampering becoming more common and the tools more available wired is the best option for security. Wireless systems are much simpler to install and may be the only option for renters but if you can install these I highly recommend them. These are much more reliable.
PonyCarMan –
These sensors work extremely well are a great deal for the price.
These sensors work extremely well are a great deal for the price. I especially appreciate how far the magnet must be separated from the sensor before the circuit opens. The product listing says “more than 20mm”. In my testing, it actually took about 30mm. In my opinion, this is very good, because it allows more flexibility in the placement of the magnet. Please see my attached video, where I tested the sensors before installing them. In my video, I wired two of these sensors to an alarm sensor in a series circuit. Note that a green LED blinks briefly on the alarm sensor when either one of the magnets is removed, and again when it is returned.The sensors are hardwired with short wires that are only about 14 inches long, so depending on your application, it is likely that you will need to extend the wires. Personally, I would have preferred screw terminals directly on the sensors, but that’s just my preference.Mounting screws are included, in addition to preinstalled double sided tape. In my use case, I wanted to mount with screws only, no tape, so I would have preferred the tape not come preinstalled. This wasn’t a big problem though, because it was fairly easy to peel the tape off.MY USE CASE:My shed had wood double-doors that were in poor condition, so I decided to replace them with new metal doors. I previously had a single wireless alarm sensor mounted directly to one of the old wood doors, with a magnet mounted to the other door, so when both doors were closed, the sensor and the magnet came together. However, that approach doesn’t work quite as well on metal doors, because the metal can block the wireless signal, so I decided to locate the wireless alarm sensor away from the metal doors for better wireless performance, and then run wires from the alarm sensor to two of these new magnet sensors, with one for each door. I wired the circuit in series, which means that if either of the doors is opened, the alarm will trigger. See my attached photos. They were easy to install and they work perfectly. I’m very happy with the result.
A Reviewer –
Good smarthome addition
This review is for “5 Sets Magnetic Contacts Wired Window Door Contact Sensor Magnetic Reed Switch NC Surface Mounted Alarm Switch Sensor”I ordered these to monitor when our dogs go in/out of the house through the dog doors and they are working flawlessly so far. I’m particularly happy with the value for the money – at under $10 for 5 sets, it’s way cheaper than most options.The magnets are surprisingly strong, so I’m glad I set it up so that it swings away to the side rather than directly away or it might not always trigger. They seem like they were intended for a more industrial purpose, so I expect the durability to be quite good (so far so good after 2 months of use).5/5 stars from me!
James –
Strong Magnets and Strong Adhesive
These door sensors are perfect for my DIY home assistant security system. The adhesive backing is incredibly strong and made installation simple without needing to drill any holes. The magnets for the switch are really strong, and allowed me to have a decent sized gap when putting my sensors on the door which was useful since my door trim is pretty beefy. The sensors worked well with the ESP32 that I am using as the communication device, and I havent had any false readings yet with it. They are compact and non-obtrusive for my wall mounting and so far seem like they will last a long time. Lastly these are a great value for a DIY project or to repair an existing system, and I couldnt be happier with their performance.
jay bachman –
Buy extras
Only one in five worked