How Do SimpliSafe Entry Sensors Work?

On this page (8 sections)

1. How does a SimpliSafe entry sensor work?
2. What alerts can the sensor send?
3. Where can you use a SimpliSafe entry sensor?
4. How do you install and set up an entry sensor?
5. How many sensors should you use?
6. What can an entry sensor do that a motion sensor cannot?
7. What should you check before choosing one?
8. Is a SimpliSafe entry sensor right for your home?

A SimpliSafe entry sensor detects when a protected door, window, or cabinet opens and can trigger a chime or a system alert. You can also set a sensor to send a quiet phone notification.

The sensor is a contact sensor for a door, window, cabinet, or another protected opening. When an opening moves, the Base Station can chime or tell you which sensor was activated.

How does a SimpliSafe entry sensor work?

A SimpliSafe entry sensor reports an opening to the Base Station when the protected door, window, or cabinet is opened. The Base Station can sound a chime or identify the sensor that was activated.

The sensor is compatible with SimpliSafe's Gen 3 home security system. It is battery powered, and setup can use peel-and-stick adhesive or the included mounting hardware.

This contact sensor monitors the opening where it is installed. It doesn't watch a whole room the way a motion sensor does.

If you are comparing basic door options, see our guide to best door alarms for home security. For the broader sensor category, door alarm sensors and placement explains common types and where they fit.

What alerts can the sensor send?

A SimpliSafe entry sensor can produce a chime or a discreet phone alert, depending on how you set it up. Chimes can help you notice a door opening without treating every entry as an emergency.

Set a Secret Alert on a sensor for a private area. It sends a notification to your phone without sounding the alarm, which can be useful for a cabinet or an interior door.

Choose the alert type based on what you need to know. A chime is easy to hear at home, while a quiet phone alert suits situations where you want notice without drawing attention.

Where can you use a SimpliSafe entry sensor?

You can use one on doors, windows, cabinets, and other openings that fit its compact design. Think first about which entry points matter to your household and which ones you can easily reach to install.

An exterior door is a common starting point because it is a direct route into the home. Accessible windows may also be worth covering, especially if they are on a ground floor or open onto a roof or porch.

Cabinets and interior spaces are different use cases. A Secret Alert can notify you if someone opens a private area without triggering an audible alarm.

Are SimpliSafe entry sensors suitable for windows?

Yes, SimpliSafe entry sensors are designed for windows as well as doors. Place the two parts so they align when the window is shut and separate when it opens.

Check that the window's movement won't pull the sensor off or cause the parts to hit one another. For more window-specific options, compare best window alarm sensors.

How do you install and set up an entry sensor?

A SimpliSafe entry sensor can be installed with adhesive or included hardware. The adhesive option avoids drilling, while permanent mounting may suit a spot where you want a more fixed installation.

Before attaching it, choose a position where the two parts meet when the opening is closed and separate cleanly when it opens. Keep the sensor clear of handles, hinges, and other parts that could bump or cover it.

The single sensor comes with extra adhesive and screws. Follow the setup steps for your Gen 3 system so the sensor is recognized and assigned the alert behavior you want.

Count the openings before choosing a pack. A four-pack can simplify coverage across several spots, but you may prefer a single sensor if you only need to monitor one opening.

How many sensors should you use?

Use one sensor for each opening you want to monitor. Make a quick list of exterior doors, accessible windows, and any interior cabinets or rooms where an alert would help.

Start with the openings that matter most instead of trying to cover every cabinet at once. You can add sensors later if your needs change, as long as they are compatible with your system.

The SimpliSafe 8-Piece Wireless System includes four entry sensors, a Base Station, a Keypad, a Motion Sensor, and a Panic Button. It may suit someone building a system from the start rather than adding one sensor to a setup already in place.

The system's entry sensors cover doors, windows, and cabinets. Its other components serve different roles, so check the included mix against the openings and rooms you want to cover.

What can an entry sensor do that a motion sensor cannot?

An entry sensor tells you when a specific opening moves, while a motion sensor detects movement within a room. These devices cover different areas, so one does not replace the other.

Use entry sensors at doors and windows where you want to know when they open. A motion sensor may help cover a room; our guide to where to put a SimpliSafe motion sensor covers placement.

If your concern is glass breaking while a window stays shut, consider a glass-break sensor as a separate type of coverage. It responds to a different event than an opening sensor.

What should you check before choosing one?

Check system compatibility, the number of openings, mounting needs, and alert preference. The single sensor and four-pack are compatible with SimpliSafe Gen 3 systems, and both support adhesive or hardware mounting.

Measure the available surface and make sure the sensor can sit flat without interfering with the opening. If you want alerts for several separate spots, count them before deciding between one sensor and a pack.

Choose the single sensor for one opening or a replacement. Choose the four-pack when several openings need coverage, and consider the 8-piece system if you also need a Base Station and other alarm components.

Is a SimpliSafe entry sensor right for your home?

A SimpliSafe entry sensor is a practical fit when you want to know that a specific door, window, or cabinet has opened and you use a compatible Gen 3 system. It can chime, identify the activated sensor, or send a quiet phone notification when configured for Secret Alerts.

Choose a single sensor for one priority opening, the four-pack for several, or the 8-piece system if you are starting with a broader setup. For installation planning across the whole home, read how to install a home alarm system yourself.

Frequently asked questions

How does a SimpliSafe entry sensor work?

A SimpliSafe entry sensor detects an opening at a door, window, cabinet, or another protected spot. When it opens, the Base Station can sound a chime or tell you which sensor was activated.

You can set certain sensors to send a quiet alert to your phone.

Do SimpliSafe entry sensors need to be wired?

No. The sensor is battery powered and can be attached with peel-and-stick adhesive or mounted with included hardware.

Follow the setup instructions for your compatible system.

Can SimpliSafe entry sensors send alerts without sounding an alarm?

Yes. SimpliSafe lets you set a Secret Alert for a sensor, which sends a discreet notification to your phone without sounding the alarm.

This can suit a cabinet or private area where you want to know when it opens.

How many entry sensors do I need?

Start with the exterior doors and accessible windows you want to monitor, then add cabinets or other spots if they matter to you. Count each opening and consider how you use the space before choosing a single sensor or a 4-pack.