SimpliSafe is one of the most popular DIY home security systems on the market, and the entry sensor is the most commonly installed component. The setup process is well documented. What most guides skip is what happens when you need to take one down.
Whether you are moving to a new home, repositioning a sensor that is not covering the right spot, or troubleshooting one that keeps triggering false alarms, removal is a process worth doing carefully. Done wrong, you can damage the sensor, pull paint off the wall, or end up with adhesive residue that prevents the new tape from bonding.
This guide walks through every removal scenario for the SimpliSafe Entry Sensor, including screw-mounted and adhesive-mounted installations, the specific technique for the magnet piece, what to do with the adhesive afterward, and how to remove the sensor from your app once it is off the wall.
How the Entry Sensor Is Built
Before removing anything, it helps to understand what you are working with. The SimpliSafe Entry Sensor has two separate pieces. The larger piece contains the wireless communication electronics and the pairing button. The smaller piece is a magnet with no electronics. When the door or window opens and breaks the magnetic connection between the two pieces, the larger piece sends a signal to your base station.
Both pieces attach to the door and door frame independently, using either the included adhesive strips or the included screws. The removal process is different for each attachment method, and the two pieces also behave differently from each other during removal even when both are adhesive-mounted.
The first thing to determine before you start pulling on anything is which method was used to install each piece.
If the Sensor Was Installed with Screws
Screw installations are the easier scenario. Slide the sensor body upward and off its mounting bracket. It should lift away cleanly without any tools. With the body removed, you will see the mounting bracket on the wall with two small screws visible. Remove those screws and the bracket comes off. Repeat the same process for the magnet piece on the door frame.
If the Sensor Body Was Installed with Adhesive
Start by sliding the sensor body upward and off its bracket, the same way you would with a screw installation. The body lifts away cleanly regardless of how the bracket is attached. With the body removed, you will see the bracket sitting on the wall with the adhesive strip behind it. Look for a small tab extending from the bottom of the strip. That is the pull tab built into the adhesive for clean removal.
Grip the pull tab firmly and pull it slowly downward at a shallow angle against the surface, not straight outward. Pulling at a low angle lets the strip stretch and release cleanly. Pulling straight out puts the stress directly on the wall surface and dramatically increases the chance of pulling paint with it.
Go slowly. The strip is designed to stretch as you pull, which is what makes clean removal possible. Rushing it defeats the mechanism.
If the tab has already broken off or is not reachable, use a piece of dental floss or a thin plastic card worked behind the adhesive to gradually loosen it from the wall. A hair dryer on low heat held a few inches from the strip for 20 to 30 seconds will soften the adhesive and make it significantly easier to work free without damaging the surface.
If the Magnet Piece Was Installed with Adhesive
The smaller magnet piece uses a slightly different adhesive backing than the sensor body bracket, and it requires a different removal technique. SimpliSafe’s own support documentation recommends against pulling the magnet straight off. Instead, grip the magnet piece and slowly rotate it side to side. The twisting motion gradually stretches and loosens the adhesive from both edges at once, allowing you to work it free without yanking.
Keep rotating and easing rather than forcing it. Once the adhesive starts to give on both sides, the piece will slide away cleanly. If it is being stubborn, the hair dryer technique applies here as well.
Replacing the Adhesive After Removal
The original adhesive strips that ship with SimpliSafe sensors are single-use. Once they have been removed, they will not re-stick to anything reliably. If you plan to remount the sensor anywhere, you need fresh adhesive before doing so.
The best option is a pack of pre-cut 3M VHB adhesive replacement pads made specifically for SimpliSafe Entry Sensors. These come pre-sized for both the sensor body bracket and the magnet piece, so there is no cutting or guessing involved. The VHB (Very High Bond) formula holds considerably better than the stock strips that ship with the sensors, which is a frequent complaint in SimpliSafe user forums.
Before applying any new adhesive, clean the back of each sensor piece and the mounting surface with isopropyl alcohol and let both dry completely. Even a small amount of residue from the old tape will compromise the bond of the replacement strip. Take the extra two minutes to do this properly.
Removing the Sensor from Your SimpliSafe System
Taking the sensor off the wall is only half the job. If you are not immediately redeploying it in a new location, remove it from your SimpliSafe system as well. A sensor that is still active in the system but physically removed from the door can trigger alerts or cause confusion in your device list, especially if the system is armed and the sensor moves.
To remove it through the SimpliSafe app, open the app and go to your device list. Tap the sensor you want to remove, scroll to the bottom of its settings, and tap Remove Device. If you are using the keypad instead, enter your Master PIN, select Devices, navigate to the sensor in question, and select Remove.
If you plan to reinstall the sensor in a new location, you can leave it in the system and simply remount it. Re-pairing is only needed if the sensor was fully removed from the system or if it is being added to a different SimpliSafe account.
Can You Reuse the Sensor After Removal?
Yes. SimpliSafe Entry Sensors are fully reusable after removal. The electronics are not affected by the removal process, and the sensor does not need to be re-paired unless it was deleted from the system. Apply fresh adhesive, clean both surfaces with isopropyl alcohol, let everything dry, and remount it in the new location.
The sensor runs on a CR-2032 lithium battery rated for up to five years of use, so battery replacement is rarely necessary as part of a relocation. If the sensor was triggering intermittently before removal, check the battery level in the app before assuming the problem was placement-related.
Frequently Asked Questions
Will the adhesive pull paint off my wall?
It depends on the paint finish, the age of the installation, and how you remove it. Flat and eggshell finishes are the highest risk. Using a hair dryer to warm the adhesive for 20 to 30 seconds before pulling significantly reduces the chance of paint damage. Always pull at a low angle, not straight outward.
What if the pull tab breaks during removal?
Use dental floss or a thin plastic card worked behind the adhesive strip to gradually loosen it from the surface. Work slowly from one edge across rather than trying to force it off all at once. The hair dryer trick is especially useful here.
Do I need to re-pair the sensor after remounting it?
Only if you removed it from the SimpliSafe system via the app or keypad. If the sensor is still active in your device list, you can remount and reposition it without any re-pairing. It will reconnect automatically when the door or window closes and the magnetic bond is established.
Can I use regular double-sided tape instead of 3M VHB?
Not recommended. Standard double-sided tape does not have the holding strength or temperature resistance needed for a sensor that sits on a door frame and endures years of vibration every time the door opens and closes. 3M VHB or Command-style strips specifically rated for the sensor’s weight are the right choice.
How do I remove the sensor from the app if I no longer have the keypad?
You can manage all devices entirely through the SimpliSafe app without needing the keypad. Open the app, navigate to your device list, select the sensor, and use the Remove Device option at the bottom of the settings screen.
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