Amazon.com: Sengled Smart Window & Door Sensor, Hub Required, Compatible with Alexa, Google Assistant and SmartThings, Echo 4th, Echo Show 10, Echo Plus, 2 Count (Pack of 1) : Everything Else
YoLink Smart Home Starter Kit: Water Sensor 4-Pack & Hub Kit - Sensor Compatible with Alexa and IFTTT, 1/4 Mile Range, Instant Remote App, Text(Limited) and Email Alert - - Amazon.com
Philips Hue Dusk-to-Dawn Outdoor Motion Sensor for Smart Home, Wireless & Easy to Install (Hue Hub Required, for use with Philips Hue Smart Lights) - - Amazon.com
Aqara Smart Hub M1S Plus 3 Aqara Water Leak Sensors, Wireless Water Leak Detector For Alarm System and Smart Home Automation - - Amazon.com
Amazon.com: WiFi Door Sensor, TESSAN Smart Window Contact Sensor Compatible with Amazon Alexa, Google Assistant, No Hub Required, Sends Alerts, Wireless Remote Alarm, Programmable with Smart Life Devices : Electronics
BroadLink Smart Motion Sensor, PIR for Home Automation, Works with IFTTT and Alexa Routines. Wireless Trigger Smart Home Devices and Scenes, Occupancy Lighting, S3 hub Included - - Amazon.com
3 Aqara Door and Window Sensor Plus 3 Temperature and Humidity Sensor3, REQUIRE AQARA HUB, Zigbee Connection - - Amazon.com
Amazon.com: WiFi Door Sensor, NEO Smart Door/Window Sensor, Detect Open/Close, Support USB Charged and Battery Powered, Support WiFi 2.4GHz, No Hub Required, Work with Alexa and Google Home Assistant : Tools &
Aqara Motion Sensor P1 Plus Aqara Water Leak Sensor, REQUIRES AQARA HUB, Zigbee Connection, Alarm System, Remote Monitor and Control, Smart Home Automation - - Amazon.com
Amazon.com: YoLink Motion Sensor, 1/4 Mile Long Range Smart Home Indoor Wireless Motion Detector Sensor Works with Alexa, IFTTT, and Home Assistant. Movement Detector App Alerts Remote Monitor-YoLink Hub Required : Electronics
Aqara Motion Sensor, REQUIRES AQARA HUB, Zigbee Connection, for Alarm System and Smart Home Automation, Broad Detection Range, Compatible with Apple HomeKit, Alexa, Works With IFTTT - - Amazon.com
Zwave Water Sensor: Aeotec Water Sensor 7 Pro, with Flood, Temperature, Humidity Sensor, SmartThings Sensor Compatible, Z-Wave Plus, S2, SmartStart, ZWave hub Required - - Amazon.com
Amazon.com: Wyze Home Security Core Kit: Hub, Keypad, Motion Sensor, Entry Sensors (x2); Compatible w/ Wyze Cam, Leak & Climate Sensors; 3 Mo. of 24/7 Professional Monitoring Service Incl., Subscription Required
Amazon.com: WiFi Door Sensor Detect Open/Close Status, No Hub Required, 2.4GHz, Work with Alexa, Google Assistant, NAS-DS05 : Tools & Home Improvement
Amazon.com: Smart Door Sensor 2 Pack, TESSAN WiFi Window Contact Sensor Work with Amazon Alexa, Google Assistant, No Hub Required, Trigger Phone Notification, Phone Alarm, Programmable with Smart Life Devices : Electronics
Amazon.com: YoLink Outdoor Contact Sensor, LoRa 1/4 Mile World's Longest Range Smart Door Sensor, Universal Contact Sensor, Alexa, IFTTT, IP63 Waterproof for Indoor/Outdoor, App Notifications - Hub Required : Tools & Home
Amazon.com: tolviviov Alpha Contact Sensor 6 Pack - Compatible with tolviviov Alpha Home Alarm System-HUB Needed : Electronics
Amazon.com : tolviviov Alpha Contact Sensor - Compatible with tolviviov Alpha Home Alarm System-HUB Needed : Electronics
Amazon.com: THIRDREALITY Zigbee Contact Sensor 3 Pack, Door and Window Sensor for Home Security and Smart Home Automation, Works with Build-in Zigbee Hub,hub Required : Electronics