The motion sensor looks directly outward from the doorbell in a cone shape of about 100º in width, tilted downward 10º, with a range of 25 feet (7.6 m). Knee-level motion at 17 feet (5 m) is the most likely to be detected when the doorbell is mounted about 45 inches (114 cm) above the ground.
Doorbell placement has an effect on your experience. The sensor works better when motion is moving across the view. But too much motion creates unwanted alerts and video.
Pointing the doorbell toward a source of light can 'drown out' the camera image, and in Night Vision, being close to a reflective surface affects how clear the image is. Try to select a view that alerts you and balances the other factors.
Blink offers Wedge and Corner Mount accessories that can shift the doorbell and motion sensor view. If your entrance is facing a street, for example, you may receive unwanted motion alerts when a car passes by.
A Wedge may help by pointing the motion sensor up or down 5º, making it more likely that motion approaching your entrance creates a motion alert, instead of cars. The Corner Mount changes the view 25º from side to side. Rotate the mount 180º to change the direction of tilt.
Make sure to use the molded screw post to secure the doorbell back plate. Use the slots to attach a wedge or Corner Mount to your surface. Click to learn more about Installing a wedge or corner mount.
Once the doorbell is pointed in the direction you want, adjust the motion sensitivity setting in the Blink app.
Tap the Settings icon in the upper right corner of your doorbell on the home screen, then the Doorbell Settings screen opens.
Enable Motion Detection - Should this camera Arm with the rest of the system?
Zones - Select areas to not detect motion.
Retrigger Time - How long to pause from one motion detection to the next.
Sensitivity - A low Sensitivity setting (1) makes it harder to detect motion.
Clip Length - How long to record after each motion event starts.
There may not be a large real life difference between any 2 numbers of sensitivity. Try to make larger adjustments until you see a result you like, then try smaller changes. Motion detection becomes more complicated when different sources of motion happen at the same time.
Try to set and test the Sensitivity when there are fewer extra motions around you. After the sensitivity settings detect your approach well, you can block out areas like roads or trees that create unwanted alerts.