Affiliate link - I may earn a commission at no extra cost to you. As an Amazon Associate I earn from qualifying purchases; some links go to other retailers with the same arrangement.
Quick verdict
A tiny, affordable Z-Wave temperature and humidity sensor. Stick it in a basement, wine cellar, or bathroom and let Home Assistant track conditions and trigger automations. No display, but that keeps it small and cheap. Good for building out environmental monitoring across the house.
Standout: Tiny Z-Wave temperature and humidity sensor. Stick it anywhere for local environmental monitoring.
Notes last checked May 31, 2026.
Compatibility snapshot
Home AssistantexcellentFull local control, no cloud needed. Native Home Assistant integration or a local protocol.
Apple HomenoneNo official support on this platform.
Google HomenoneNo official support on this platform.
AlexanoneNo official support on this platform.
Works offlineyes
Setupeasy
Extra hub neededyes
Powerbattery
Local control facts
Home Assistant: zwave_js integration, Local Push (home-assistant.io, checked Sep 10, 2026)
Z-Wave JS: in the device database, listed as Zooz ZSE44 (Temperature Humidity XS Sensor) (github.com, checked Sep 10, 2026)
Why it stands out
tiny XS form factor with adhesive mount, so you can place it anywhere without bulk
reports both temperature and humidity as separate Home Assistant entities
configurable reporting thresholds so it only sends updates when values actually change
Reasons to hesitate
runs on a single user-replaceable CR2450 coin cell, so battery life is modest
no display, so you need Home Assistant or a dashboard to read the values
reporting intervals affect battery life, and aggressive reporting drains faster
Best for
monitoring temperature and humidity in wine cellars, server rooms, crawl spaces, or greenhouses
HVAC automation triggers, like turning on the dehumidifier when humidity passes a threshold
Avoid if
you want a sensor with a built-in display for at-a-glance readings
you need fast, frequent updates, since battery sensors have reporting intervals
Privacy and local-control notes
Battery-powered Z-Wave sensor. No cloud, no internet needed. Temperature and humidity data stays local.
Home Assistant support: supported · integration path: Z-Wave JS.
Buying reality check
Price notes: Cheap enough to put one in every room. Budget-friendly environmental monitoring for Z-Wave networks.
One verified price read so far: $44.95 at amazon on Sep 5, 2026.
CO2, PM2.5 and VOC with no cloud account: AirGradient ONE overall, Apollo AIR-1 for ESPHome, IKEA ALPSTUGA for the money. What each one actually measures.
Learn how to use Home Assistant locally to monitor humidity and temperature, spot mold-prone conditions, and set up alerts that keep your home healthy.
