Aeotec Recessed Door Sensor 7 vs Sonoff SenseGuard DW Gen2

Sonoff SenseGuard DW Gen2, thanks to a much better owner reception, tamper and low-battery alerts, three year AAA battery life and broad platform support. Aeotec Recessed Door Sensor 7 wins on price and on being invisible once installed, since it is recessed into the door and frame.

Aeotec Recessed Door Sensor 7 is bored into the door edge and frame, so nothing is visible when the door is closed, which appeals to anyone who dislikes a plastic box on the trim. Sonoff SenseGuard DW Gen2 is a surface-mount sensor at 90 x 26 x 13.5 mm, and it is bulkier than most coin-cell rivals.

Aeotec Recessed Door Sensor 7 is Z-Wave Plus V2 with S2 security and SmartStart, so it needs a Z-Wave hub such as SmartThings, Hubitat, Fibaro or Home Assistant. Sonoff SenseGuard DW Gen2 is Zigbee and needs a Zigbee hub, with documented support for Alexa, Google Home, SmartThings, Home Assistant and IFTTT.

Sonoff SenseGuard DW Gen2 is well received, with owners reporting near-instant pairing through Zigbee2MQTT or ZHA. Aeotec Recessed Door Sensor 7 has a weaker record: unpredictable CR2 battery life, units that overheat and fail, strip-prone screws and poor signal performance inside metal doors.

Sonoff SenseGuard DW Gen2, which includes a tamper alert alongside low-battery warnings and 90 days of history. Tamper alerting is not documented for Aeotec Recessed Door Sensor 7, although its recessed installation makes casual removal much harder in the first place.

Owners running Z-Wave who want a completely hidden sensor on a wooden door and are willing to drill, tinker and accept the battery and reliability risk. For a straightforward, dependable contact sensor with tamper alerts and cheap AAA power, Sonoff SenseGuard DW Gen2 is the better buy.