Ecobee SmartSensor vs Sonoff SNZB-02M AirGuard TH Pressure Sensor

The Sonoff SNZB-02M AirGuard TH Pressure Sensor wins overall as a general sensor, costing less, connecting more broadly, and measuring humidity and pressure that the Ecobee SmartSensor cannot. The Ecobee SmartSensor counters with occupancy detection, a longer warranty and a longer battery life, but only as an Ecobee thermostat accessory.

The Ecobee SmartSensor only works paired with an Ecobee thermostat over a proprietary radio and adds occupancy detection, while the Sonoff SNZB-02M AirGuard TH Pressure Sensor is a standalone Zigbee sensor that measures humidity and atmospheric pressure on top of temperature.

No, it measures temperature and occupancy only. The Sonoff SNZB-02M AirGuard TH Pressure Sensor measures temperature, humidity and atmospheric pressure.

The Ecobee SmartSensor, rated for about 5 years on its coin cell with a 3-year warranty, versus about 2 years and a 2-year warranty on the Sonoff SNZB-02M AirGuard TH Pressure Sensor.

Ecobee thermostat owners who want occupancy-aware room balancing, a long warranty, and minimal battery upkeep, and who don't need humidity or pressure data.

Anyone who wants a standalone Zigbee sensor for humidity and barometric pressure monitoring rather than a single-brand thermostat accessory.