Aeotec aërQ Temperature and Humidity Sensor 8 (Z-Wave LR)

Product detailed description

Smart Temperature and Humidity Sensor with Z-Wave Long Range That Warns You About Mold

Aeotec aërQ 8 is a small Z-Wave temperature and humidity sensor for your apartment, house, office, basement or cabin. It continuously measures temperature and relative humidity and sends the results to your smart home hub. On top of that, it keeps calculating the dew point from the measured values and notifies you when it is time to ventilate.

It is the successor to the popular aërQ sensor. It is built on the Z-Wave 800 platform with Z-Wave Long Range technology, so it connects reliably even in a larger house, across several floors or in an outbuilding.

Most thermometers just show you a number. aërQ 8 tells you what to do with it: when a bedroom is too warm for sleeping, when frost threatens in the basement, or when water starts to condense on a cold exterior wall. This smart hygrometer monitors temperature from -10 to 60 °C with ±1 °C accuracy and relative humidity from 0 to 80 % with ±3 % accuracy.

Dew point and mold warning. Mold forms where warm, humid air meets a cold wall. The sensor therefore constantly compares temperature with humidity and calculates the real risk of condensation. When conditions become critical, the hub receives a notification about mold risk. You can get it on your phone or use it to trigger ventilation, heat recovery or a dehumidifier right away. Place the sensor near the critical spot, for example by an exterior wall, in a corner behind a wardrobe, in the bathroom or in the basement.

Bedroom comfort and frost protection. The temperature sensor alerts you to an overheated bedroom on summer nights, but also to dangerously low temperatures in winter. This prevents frozen pipes at your cabin, in the garage or in an unheated basement. Once you connect it with air conditioning or heating, your home reacts on its own.

Battery or USB-C, your choice. This smart hygrometer runs on one CR14250 lithium battery (3 V, 1500 mAh), which according to the manufacturer lasts up to 4 years (with factory settings the technical specification states about 2 years; battery life depends on how often the sensor sends reports). If you have a USB charger at hand, you can power it permanently via USB-C 5 V and forget about the battery.

Z-Wave 800 a Long Range. The 800 series chip (EFR32ZG23) supports the classic Z-Wave mesh network as well as Z-Wave Long Range, where the sensor connects directly to the hub over a much greater distance. Communication is encrypted via S2 and you add it to the network using SmartStart by scanning the QR code. Model ZWA057-C (also written as ZWA057C) is the European version for the 868.4 MHz frequency. If you are still choosing a hub, check out our smart home controllers, or browse our smart home sensors.

Tamper protection. The sensor has a tamper contact. If someone opens it or removes it, the hub finds out, which you will appreciate for example in a rented apartment or an office.

Who is the aërQ 8 for

• Households struggling with damp walls, condensation on windows or mold in corners.
• Owners of cabins, cottages and holiday homes who want to monitor temperature and frost remotely.
• Users of Home Assistant, Homey, SmartThings or Fibaro who want to automate ventilation and heating.
• Larger houses and properties where an ordinary Z-Wave sensor cannot reach the basement, garage or workshop.
• Owners of the older aërQ sensor who want a newer chip, Long Range and USB-C power.

Use cases

• Automatic bathroom ventilation: when humidity rises after a shower, the sensor turns on the fan and turns it off once the air is dry.
• Mold warning in the bedroom: when there is a risk of condensation on a cold wall, you get a notification to ventilate.
• Basement humidity control: when the limit is exceeded, a dehumidifier switches on automatically via a smart plug.
• Protecting your cabin from frost: when the temperature drops below the set threshold, the hub turns on heating or sends you a message.
• Comfortable sleep in summer ❄️: when the bedroom overheats, the air conditioning or ceiling fan switches on.
• Heating control by room: every room has its own measurement, so thermostatic valve heads regulate according to the real temperature.

Key features

• Temperature measurement: range -10 to 60 °C with ±1 °C accuracy.
• Humidity measurement: relative humidity 0 to 80 % with ±3 % accuracy.
• Dew point calculation: the sensor calculates it by itself and sends it to the hub.
• Mold risk notification: warns you before water starts to condense on the walls.
• Z-Wave 800 s Long Range: stable connection over long distances and low power consumption.
• Dual power options: CR14250 battery or permanent USB-C 5 V power.
• S2 security and SmartStart: encrypted communication and easy pairing via QR code.
• Tamper protection: the hub learns when someone tampers with the sensor.
• Compact size: only 69.9 × 17.8 × 19.6 mm and 21 g, unobtrusive in any room.

Technical specifications

Protocols and compatibility

• Z-Wave Plus (800 series): certified sensor with S2 security and SmartStart pairing. Works with any EU Z-Wave hub (868.4 MHz).
• Z-Wave Long Range: works only with a hub that supports Long Range (Z-Wave 800 with LR). With an older hub the sensor connects in regular mesh mode.
• Home Assistant: via Z-Wave JS with a USB controller, for example Aeotec Z-Stick 10 Pro, which also handles Long Range.
• SmartThings, Homey, Fibaro: the manufacturer states compatibility with these Z-Wave platforms. The scope of support (e.g. dew point display) depends on the hub driver.
• Signal repeater: the sensor is not a repeater (even when powered via USB-C), so it does not extend your Z-Wave network.
• Zigbee, Wi-Fi, Matter: not supported, it is strictly a Z-Wave device.

Why choose the Aeotec aërQ 8

• It does not just measure, it evaluates: dew point and mold warning are built into the sensor.
• Long Range reach that covers the basement, garage or garden house as well.
• Flexible power: years on a battery or permanently via USB-C.
• Trusted Aeotec brand supported by the most widespread Z-Wave systems.

Compared with its predecessor Aeotec Water Leak Sensor 8 a Aeotec Door and Window Sensor 8.

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