Aeotec Multipurpose Sensor vs Sonoff SenseGuard DW Gen2

Sonoff SenseGuard DW Gen2, mainly on longevity and alerting: three years on two AAA cells against one year on a CR2450, plus tamper and low-battery alerts and 90 days of history. Aeotec Multipurpose Sensor wins on price and on sensing, adding temperature plus vibration and tilt detection.

Beyond open and close it reports temperature and senses vibration and orientation, so owners use it for knock detection on a door or to know when a washing machine finishes. Sonoff SenseGuard DW Gen2 is a contact sensor only, with no temperature reading and no vibration sensing.

Sonoff SenseGuard DW Gen2 uses two standard AAA batteries rated for about three years, which are cheap and easy to find. Aeotec Multipurpose Sensor uses a CR2450 rated for a year, and owners frequently report it draining far faster, to the point of using a USB-to-CR2450 adapter where a socket is available.

Yes. Both are Zigbee devices with no Wi-Fi, Bluetooth or Thread fallback, so a Zigbee hub is required. Both are documented as working with Home Assistant, and Sonoff SenseGuard DW Gen2 additionally lists Alexa, Google Home, SmartThings and IFTTT support.

Aeotec Multipurpose Sensor is known for it, reporting closed even when the halves sit well apart, on different planes or at a right angle, and through a window screen. Sonoff SenseGuard DW Gen2 specifies a 15 mm minimum detection distance and supports both horizontal and vertical magnet mounting.

Owners of doors with raised trim, casement windows or other awkward alignments, and anyone who wants temperature and vibration data from the same device, at a lower price. If replaceable AAA power, tamper alerts and a longer service interval matter more, Sonoff SenseGuard DW Gen2 is the better pick.