Zigbee Multi Sensor 4-in-1

£23.99 excl. VAT

NEW 2024 Model!

Ultimate integration of smart sensing technology for your home. This state-of-the-art device is not just a sensor, but a comprehensive monitoring system packed into one sleek unit that seamlessly integrates with Home Assistant, making it a perfect addition to your smart home. Our Multi Sensor can be either wall mounted on a standard UK/EU socket or used as a standalone device once detached from the accompanying frame.

  • Motion: Detects movement with precision, ensuring your home’s security and automation needs are met.
  • Occupancy: Understands room occupancy, optimizing energy usage and enhancing comfort.
  • Temperature: Monitors ambient temperature, ensuring your living spaces are always at the ideal warmth.
  • Humidity: Keeps track of moisture levels, perfect for maintaining optimal room conditions.
  • Illumination: Measures light intensity, allowing for perfect ambiance setting and energy savings.
  • Battery-Powered: Operates on just 2 x AA batteries, ensuring longevity and ease of use.
  • Low Power Consumption: Designed for efficiency, it ensures minimal battery drain and a longer device lifespan.

Out of stock



Home Assistant

Package contains:
SM321 Zigbee Multi Sensor
2 x AAA batteries
3M adhesive & Manual

Note: PIR motion sensors can be triggered by other sources of infrared radiation, such as direct sunlight or heaters, so it’s important to properly position and test the sensor to avoid false alarms.

Additional information

Weight 100 g



SM301Z Zigbee PIR Manual





Alexa can’t find the sensor Alexa app  

Ensure you have compatible Echo device. Double check the list of devices, as sometimes Echo may display “No new devices found” message after successfully adding new devices


My sensor stopped working Alexa app update  

Reset the sensor and re-add to Alexa. Ensure the old sensor is removed from Alexa before re-adding again


My Lights Off routine has stopped working Alexa app update  

  1. Delete the old action
  2. Add Wait action for your required time, e.g. 5 mins
  3. Add Time action of 0 minutes. The Lights Off routine will now be delayed 5 mins before executing the Time action.

Note: motion detection is pre-set to one trigger per 60 secs.


Sensor shows “There was a problem” message Alexa app update  

The message can safely be ignored if the sensor is used with Alexa routines. Reset the sensor and re-add to Alexa routines. Ensure the old sensor is removed from Alexa before pairing again



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