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door/window sensors
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Eufy T89000D4 door/window sensor Wireless Door/Window White
Security, Entry Sensor, Detects Opened and Closed Doors or Windows, Sends Alerts, Triggers Siren, 2-Year Battery Life, Indoor-use Only, Requires HomeBase E, or HomeBase 2134 available£23.82 £19.85 -
Cisco Meraki MT20 door/window sensor Wireless White
Bluetooth, AA, 2.400–2.4835 GHz, 81.2mm x 39.7mm x 19.5mm, White42 available£72.91 £60.76 -
Vertiv Liebert SN-2D door/window sensor Wired Black
Modular sensor is a two-door switch monitor sensor with a two connection points2 available£104.75 £87.29