Does It Really Measure Humidity?

Plenty of Z-Wave devices list “temperature” but skip humidity. If you want to drive a bathroom fan or dehumidifier, confirm the RH sensor is there. Dew point and mold-risk reports (aërQ, Door Window Sensor 8, Water Sensor 8) are a useful bonus for basements.

Z-Wave Generation & Long Range

800 Series sensors bring S2, SmartStart, better battery life and optional Long Range for garages, sheds and attics. 700 Series and Z-Wave Plus units still work on any modern hub but stay on the regular mesh.

Power & Reporting Interval

Coin-cell sensors report on a timer or after a threshold change to save battery. USB or mains-powered models (MultiSensor 7, Q Sensor, Water Sensor 8, HSM200) can report more often and the mains-powered ones also repeat your mesh.

Size & Operating Range

Tiny sensors like the ZSE44 and aërQ hide on a shelf or door frame. Check the rated operating range too: the ZSE44 is specified for about 40-90 °F, so a freezer or unheated garage in winter needs a different pick.

Hub Support

Home Assistant (Z-Wave JS), Hubitat, Z-Box, HomeSeer and Homey support nearly everything here. SmartThings sometimes needs an Edge driver, alarm panels often ignore humidity, and the Trane sensor only pairs with Trane systems.

The aërQ is Aeotec’s dedicated climate sensor and the only pick here built around dew point. Alongside temperature (rated -10 to 65 °C at ±1 °C) and relative humidity (0-80% at ±3%), it reports dew point so your hub, or Aeotec-aware software, can warn when a room sits in mold-friendly conditions. That makes it a smart choice for basements, closets on exterior walls and bathrooms without good ventilation. It’s tiny at 1.38 in square, mounts with tape (on top of a door frame is a favorite spot), runs on a CR2477 coin cell and uses a 700 Series radio with S2 and SmartStart. Aeotec’s store quotes two years of battery life, while the Amazon listing says a year or more. Amazon reviews are mixed, with most complaints about pairing on older hubs, so it’s best on a current Home Assistant, Hubitat or SmartThings setup.

Aeotec’s newest contact sensor quietly makes a strong case as a climate sensor. The Door Window Sensor 8 detects open, closed and tilt positions with a 3-axis sensor (handy for tilt-and-turn windows and skylights), and adds built-in temperature and humidity sensing with mold-hazard and dew point reports. That combination enables one of the most useful automations in the house: pause the heating or AC when a window opens, and log the room’s climate while you ventilate. It’s an 800 Series device with Z-Wave Long Range, and Aeotec lists SmartThings and other certified Z-Wave hubs as compatible. It is new on Amazon with only a small number of reviews so far, and a sensor on a window frame will read slightly cooler in winter than one in the middle of the room, so treat it as a window-zone reading.

Bathrooms need two things from a sensor: humidity to run the exhaust fan after a shower, and motion so the lights don’t switch off while you’re in there. Zooz’s Q Sensor covers both. It reports temperature, humidity (0-100%) and light, plus motion up to 20 ft, all on an 800 Series radio with Long Range support. It runs on two CR123A cells or micro-USB (one source at a time), and on USB it reports instantly and repeats the mesh, which is ideal near a bathroom outlet. The small multi-angle bracket makes corner mounting easy. Zooz publishes a specific list of supported hubs, SmartThings needs a custom Edge driver, and Amazon ratings trail the rest of the Zooz line, so check your hub before buying.

Basements, utility rooms and the space under a water heater are exactly where you want both leak detection and humidity data, and the Water Sensor 8 delivers both. Aeotec’s newest leak sensor detects water instantly while also reporting temperature, humidity and mold risk, so one device warns you about a burst hose and about a damp crawlspace. The 800 Series radio supports Long Range (Aeotec quotes up to a mile line of sight with a compatible hub). Power is flexible: the included battery is rated up to four years, or you can run it from USB-C for continuous power. A 2.5 mm input also lets you wire in dry-contact sensors such as reed switches. It’s a new listing with only a handful of reviews, so early buyers should expect the occasional firmware update.

The Water Sensor 7 Pro is the predecessor to pick #6 and still a solid buy, with a much longer track record on Amazon. It alerts your hub when it detects as little as 0.02 in of water and reports temperature and humidity, which Aeotec pitches for managing heating, cooling and bathroom ventilation. It uses Aeotec’s Gen7 (700 Series) radio with S2 and works with certified Z-Wave gateways including Hubitat, Home Assistant and Fibaro. Choose it over the Water Sensor 8 if you value a proven product with lots of reviews and don’t need Long Range; choose the 8 for the newer radio, USB-C power and dry-contact input.

Sometimes you don’t need a temperature graph, you need a loud warning before pipes freeze. The Ecolink FLF-ZWAVE5-ECO is built for that. It triggers a freeze alert at 41 °F (5 °C), early enough to act before a crawlspace or unheated garage pipe bursts, and doubles as a leak detector with a 36 in probe you can run under a sink or behind a washer. One CR123A lithium cell is rated for five years, which is ideal for a vacation home you rarely visit. It’s the highest-rated pick here on Amazon by review count. Understand what it is, though: a threshold alarm, not a thermometer that reports continuous readings or humidity, and it uses an older Z-Wave Plus radio without Long Range.

Most climate sensors here are indoor-only. If you want an outdoor temperature reading on your Z-Wave network, the Zooz ZSE70 is the weatherproof option: it carries an IP66 rating and reports temperature and light alongside motion up to 30 ft. That’s useful for logic like “close the shades when it’s hot and sunny” or “turn on the heat tape below freezing.” The 800 Series radio supports Long Range for detached garages and gates, and you can run it on two CR123A lithium cells (better in the cold than alkaline) or wire 12-24 V AC/DC for constant power. It does not measure humidity, and like any outdoor sensor it needs shade to avoid inflated readings in direct sun.

The TriSensor 8 is for rooms where you want temperature for your thermostat plus motion and light for lighting, but don’t care about humidity: bedrooms, offices and living rooms in a dry climate. It combines temperature (±1 °C), light (up to 30,000 lux) and motion on Aeotec’s 800 Series platform with S2, SmartStart and Long Range. It runs on one CR123A; Aeotec quotes up to 2.5 years, while the Amazon listing is more conservative. Mount it with the arm bracket, tape or screws, or flush with Aeotec’s Recessor. If humidity matters, step up to the MultiSensor 7 or Q Sensor instead.

Tired of coin cells? The HSM200 plugs straight into a standard US outlet, so it never needs batteries and can report as often as your hub likes. It measures temperature, motion and light, and because it’s mains powered it also acts as a Z-Wave repeater, strengthening your mesh. A programmable RGB LED (seven colors) can double as a status light, for example glowing blue when a room is too cold or red when the alarm is armed. HomeSeer lists support for HomeSeer, Hubitat, Home Assistant and SmartThings. The downsides: no humidity sensor, an older Z-Wave Plus radio, a reading taken near the floor at outlet height, and Amazon ratings that are the weakest in this guide.

This one is for a specific audience. The ZSENS930AW00MA is Trane’s own wireless Z-Wave remote sensor, and the Amazon listing is clear that it only pairs with Trane ComfortLink and AccuLink systems. If you have one of those communicating thermostats, this is the official way to add room-level temperature and humidity readings so your system can average or prioritize rooms, and it supersedes the older ZSENS930 part numbers. Published specs for this part list about ±1 °F temperature accuracy and a 10-90% humidity range. Do not buy it for Home Assistant, Hubitat or SmartThings, and note that the listing marks it non-returnable.

Want a sensor in every room?

Standardize on the Zooz ZSE44 800LR: tiny, Long Range ready and focused on temperature and humidity.

Want one device per room?

The Aeotec MultiSensor 7 adds motion, light and UV, and runs on USB for frequent climate reports.

Worried about mold?

Use the Aeotec aërQ for dew point, or the Water Sensor 8 to add leak alerts in a basement.

Automating a bathroom fan?

The Zooz Q Sensor pairs humidity with motion so the fan and lights follow the same logic.

Protecting pipes from freezing?

The Ecolink FLF-ZWAVE5-ECO alerts at 41 °F with a five-year battery; add the ZSE70 for outdoor readings.

Already adding window sensors?

Pick the Aeotec Door Window Sensor 8 and get temperature and humidity with every window you secure.

Do Z-Wave temperature and humidity sensors need a hub?

Yes. Z-Wave sensors have no Wi-Fi, so they report to a Z-Wave controller such as Home Assistant with a Z-Wave USB stick, Hubitat, SmartThings, Zooz Z-Box, HomeSeer or Homey, which stores the readings and runs your automations. The Trane sensor is the exception in that it pairs only with a Trane ComfortLink or AccuLink system. If you still need a controller, see our guide to the best Z-Wave hubs and USB sticks.

Where should I mount a temperature and humidity sensor?

Mount it on an interior wall at roughly chest height (about 4-5 ft), away from direct sunlight, HVAC vents, radiators, lamps, TVs and kitchen appliances. Exterior walls and window frames read cooler in winter and warmer in summer. In bathrooms, keep it out of direct shower spray but in the same room so humidity spikes register quickly. Give a new sensor an hour to settle before comparing it with another thermometer.

Why do my readings update so slowly?

Battery sensors sleep most of the time and only report on a timer or when the value changes by a set threshold. Most let you shorten the interval or lower the threshold in your hub’s device settings, at the cost of battery life; on coin-cell sensors you may need to wake the device with its button for new settings to apply. If you need near real-time data, choose a USB or mains-powered model such as the MultiSensor 7, Q Sensor, Water Sensor 8 or HSM200.

Can these sensors control my thermostat or dehumidifier?

Indirectly, through your hub. A common setup is to average several room sensors in Home Assistant or Hubitat and adjust a Z-Wave thermostat’s setpoint, or to switch a dehumidifier, humidifier or exhaust fan through a Z-Wave smart plug or switch when humidity crosses a threshold. Our guides to the best Z-Wave thermostats and best Z-Wave smart plugs cover the hardware on the other end.

Can I use these sensors outdoors, in a garage or in a freezer?

Check the operating range first. The Zooz ZSE44 is rated for about 40-90 °F and can sit on a covered porch in mild weather, while the IP66 Zooz ZSE70 is built for outdoor use (temperature only). For unheated garages and crawlspaces where freezing is the concern, the Ecolink flood/freeze sensor alerts at 41 °F. None of these picks is designed to sit inside a freezer; for that, use a dedicated probe-style sensor and keep the radio outside the metal box.