Best Window Alarm Sensors

Ring Alarm Contact Sensor (2nd Generation)

Ring Alarm Outdoor Contact Sensor

Ring Alarm Pack - S by Amazon | Smart home alarm security system with optional Assisted Monitoring - No long-term commitments | Works with Alexa

Yale IA-320 Sync Smart Home Alarm 6 piece kit. Includes Sync Alarm Hub, External Siren, 1x Door/Window Contacts, 2x PIR Motion Detector, Keypad. Works with Alexa, Google Assistant & Philips Hue

SimpliSafe 10 Piece Wireless Home Alarm System (3rd Generation) with Motion Sensor, HD Security Camera and Outdoor Siren - Home Security Systems with Optional Monitoring and No Contracts

CPVAN Home Alarm System, WiFi PIR Motion Sensor Alarm, Wireless DIY Smart Door/Window Alarm for Home Security with Phone APP Alert 9 Pieces Kit (Indoor PIR Alarm Hub, 6 Door Sensors, 2 Remotes), CP2W.

eufy Security 5-Piece Home Alarm Kit, Home Security System, Keypad, Motion Sensor, 2 Entry Sensors, Home Alarm System, Control From the App, Links with eufyCam

Yale HSA Essentials Alarm Kit, Battery Powered, 5 Piece Kit, Self Monitored, No Contract, Wireless, PIR Movement Sensors, Door/Window Sensor External Siren, Keypad, No Monitoring Fee

Yale AC-DC Sync Alarm Door/Window Contact - Sync Smart Home Alarm - 200m range

TECKNET Door Alarm Sensor, Mini Window Alarm Sensors, Door Sensor Alarm for Home Security Systems with Quick Loud 100dB Ring Alarm, Wireless Burglar Alarms for House, Shop, Office, Garage (6 PCS)