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Motion Sensor 101: What You Need to Know

Written by Naomi Ramirez

Updated at August 4th, 2025

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Table of Contents

Arm Modes & Motion Detection Best Practices: Where Not to Install Your Sensor How to Enter Test Mode Exit Test Mode Motion Sensor FAQs Questions or Need Help?

Your motion sensor is designed to detect movement based on heat changes in its field of view. It’s a key part of your home’s protection, and understanding how it works ensures you're getting the best performance.

Arm Modes & Motion Detection

  • Arm Away – Motion detection is active. If movement is detected, the alarm will trigger.
  • Arm Stay – Motion detection is inactive, so you can move freely at home without setting off the alarm.

Battery Saver: After detecting motion, your sensor goes into a 3-minute sleep mode to conserve battery life.

Best Practices: Where Not to Install Your Sensor

To avoid false triggers and ensure accurate detection, do not install your sensor:

  • In direct sunlight
  • Facing a window
  • Near air vents with warm air
  • Where pets gather or might jump onto furniture
  • In humid areas where condensation may occur
  • Near high shelves or furniture, small pets can climb

How to Enter Test Mode

Want to test the sensor’s motion detection?

  1. Remove the back cover of the sensor (use the clip inside the small hole on the bottom)
  2. Take out the battery
  3. Hold the tamper switch while re-inserting the battery
  4. Reassemble the sensor

In Test Mode: A red light will flash every time motion is detected, and the 3-minute sleep period will shorten to just 15 seconds.

Exit Test Mode

To return the sensor to normal operation:
Simply remove and reinsert the battery without holding the tamper switch.

Motion Sensor FAQs

  • Pet-Friendly: Ignores pets under 25–45 lbs. (adjustable sensitivity inside the sensor)
  • Field of Vision:
    • 90° side-to-side horizontal view
    • Sees about 35–45 feet forward
    • Detects motion downward at a 45° angle, but not upward
  • Sleep Mode: After motion is detected, the sensor goes inactive for 3 minutes to save battery, even if unarmed.

Questions or Need Help?

We’re here for you! If you have any concerns or need help testing or relocating your sensor, don’t hesitate to reach out to our support team.

 

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Home Security
  • Home Security
  • Alarm Panel and Hub
  • Door Sensor
  • Window Sensor
  • Motion Detector
  • Glass Break Detector
  • Key Fob
  • Panic Button
  • Secondary Siren
Environmental Detectors
  • Environmental Detectors
  • Smoke Detector
  • Carbon Monoxide
  • Water Leak Detector
Cameras
  • Cameras
  • Eufy Indoor Camera
  • Eufy Outdoor Camera
  • Eufy Doorbell Camera
Services
  • Services
  • Cove Connect App
  • Professional Monitoring
  • RapidSOS
  • Professional Installation
Company
  • About Us
  • Reviews
  • Press Center
Help
  • Help Center
  • Contact Us
  • Resources
  • Articles
  • 855.268.3669
Exclusive Pricing
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  • Medical Personnel
  • Teachers
  • Government Employees
Get Cove Deals
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© 2024 Cove Smart, LLC All rights reserved. 14015 Minuteman Drive, Draper, UT 84020

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