Start with these three measurements, then review the compatibility result below.
Most WELOCK smart lock cylinders are designed for euro-profile doors commonly used in many European homes and apartments. If your door uses a different format, such as an American cylinder, you may need a different WELOCK solution.
Measure the full thickness of your door, including any cover plates or rosettes on both sides. This helps you choose the correct smart lock cylinder size and avoid installation problems.
A = the cylinder length on the outside
B = the cylinder length on the inside
C = the total door thickness, including fittings where applicable
Measure the door backset before choosing your smart lock cylinder. Backset is the distance from the door edge to the center of the keyhole or cylinder. Make sure there is enough clearance around the cylinder for proper installation.
Select two WELOCK models to compare their cylinder type, supported door thickness, backset requirements and key features.
| Products | ||
|---|---|---|
| Cylinder Type | ||
| Standard Cylinder Configuration | ||
| Door Thickness | ||
| Minimum Backset | ||
| Bluetooth Access | ||
| Fingerprint Access | ||
| PIN Code Access | ||
| Temporary Passcodes | ||
| WELOCK App Access | ||
| Remote Unlocking via WiFiBox3 | ||
| Amazon Alexa via WiFiBox3 | ||
| Home Assistant via WiFiBox3 | ||
| RFID Smart Card | ||
| USB-C Emergency Power | ||
| Mechanical key | ||
| Battery Life | ||
| Waterproof |
Still Not Sure? Send Photos to Support via [email protected]
If your door uses an American cylinder instead of a Euro-profile cylinder, you may need a different WELOCK solution. Explore the models designed for this door type here.
Many European homes and apartments use a euro-profile cylinder, which is the main type supported by most WELOCK smart lock cylinders. If your current cylinder matches that shape, you may already be on the right track. If you are unsure, the easiest next step is to compare it with the examples in the checker or send a photo to support.
In most cases, you only need to check three simple details: cylinder type, door thickness, and backset. These measurements help you understand which smart lock cylinder is the best fit for your door.
Yes. When measuring door thickness, include any trim, plate, or escutcheon that affects the full thickness of the door where the cylinder is installed. This gives you a more accurate fit check.
Backset is the distance from the edge of the door to the center of the keyhole or cylinder. It helps show whether there is enough space for the smart lock cylinder to fit and operate comfortably on your door.
In many cases, yes. If your apartment door uses a compatible Euro-profile cylinder and the measurements fall within the supported range, a WELOCK smart lock cylinder is a good fit. A quick compatibility check is the best way to be sure.
That is completely fine. Start by checking the door thickness and looking at the cylinder type. If anything is unclear, you can also send a photo and a few basic measurements to the WELOCK support team at [email protected] for help confirming fit.
In many standard Euro-profile door setups, yes. A smart lock cylinder is usually designed to replace the existing cylinder, so installation is often simpler than expected.
Yes, in many cases it can, but available space around the handle, escutcheon, or cylinder area should be checked first. If your door has tight clearance, measuring carefully or sending a photo to the support team [email protected] can help confirm whether a WELOCK smart lock cylinder is a good fit.
