SwitchBot Door Alarm Sensor 3 Pack

A smart door and window contact sensor can make home security feel calmer and more controllable, especially when you are out. The SwitchBot Door Alarm Contact Sensor 3 Pack is designed to detect when doors or windows open and close, and then trigger actions you set up in the SwitchBot app. It also supports remote alerts and Alexa voice notifications, so you are not left guessing when something changes.

With this 3 pack, you can cover more entry points around your home without having to repeat the setup process again and again. The sensors are wireless, built for easy placement, and rely on proximity of the magnet to the main housing for correct detection. 🏡

The essentials

The SwitchBot contact sensor is a doorway and window alarm designed to detect opening and closing, helping you keep an eye on what is going on at home. According to the product information, the sensor includes a built in motion sensing capability, so it can also respond when movement is detected in your set scenario. When an opening is detected, you receive alerts, and you can configure actions through the SwitchBot Scenes in the app.

A key practical benefit is the way actions can switch according to whether you are leaving or coming back. When the sensor detects that you are going out, it can turn devices off automatically, and when it detects you are returning, it can turn devices on automatically. This kind of automation helps reduce the small everyday uncertainties, like remembering which devices were left running.

Another advantage is the use of Alexa voice alerts for added reassurance. You can get a door open notification on your mobile, and Alexa can help raise a voice alarm to discourage unwanted activity. 🔔

Key features

This 3 pack format makes it easier to cover multiple rooms, doors, or windows with consistent detection. Each sensor is designed for wireless installation with battery power, and the setup can be done without tools, using the app to configure what happens when the sensor detects changes. If you are outfitting a more connected home, the sensors can join the wider SwitchBot ecosystem so your scenes can include other compatible SwitchBot devices.

The product information also highlights a built in light feature linked to the environment getting darker and movement being detected, so the sensor can automatically help with illumination when it matters. For the detection to work correctly, the magnets need to be aligned with the back of the housing, and the distance between the two components must be under 30 mm. ✅

You can also set up remote alerting to help you react quickly. For example, if a suspicious person enters while you are not at home, you receive a notification about a door opening, and Alexa can initiate a voice alarm. That mix of mobile notification and voice reinforcement is useful when you want security signals to be obvious, not buried in logs.

Keep in mind that the system requires the SwitchBot Hub Easy to install and place in any location for compatibility with Alexa. So if you are planning voice alerts and home automation through the SwitchBot app and scenes, make sure you have the hub available as part of your setup. 🧩

Tech specs

• Name: SwitchBot Door Alarm Contact Sensor 3 Pack
• Type: Door and window contact sensor alarm
• Material: Plastic housing
• Colour: White
• Size: Compact design
• Capacity: Battery powered
• Connectivity: Wireless

Worth considering if

It’s a good fit if you want contact based detection for doors and windows, plus the ability to trigger scenes in the SwitchBot app. You’ll like it if you prefer quick wireless placement and want remote mobile notifications alongside Alexa voice alerts. It might not suit you if you are not planning to use the SwitchBot Hub, since the hub is required for Alexa compatibility.

For anyone mapping security coverage across multiple entry points, the 3 pack can help you spread sensors to the places where you notice changes first.