Temperature & Humidity
Temperature & Humidity for Australian smart-home installs, selected for protocol-clean setups across Matter, Zigbee, Thread and Wi-Fi.
Sensors · 7 products Temperature & Humidity at Synced Australian stock
Filter guide
Which protocol should I pick?
Protocols are the wireless languages smart devices use to talk to each other. Some need a hub, some run straight off your Wi-Fi. Here's what each one means for your setup.
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Zigbee
Low-power meshThe cleanest mesh for a bigger setup. Every mains-powered device repeats the signal, so coverage grows as you add more. Needs a hub like a Hue Bridge or SmartThings.
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Bluetooth
Direct, short-rangeGood for setup and close-range control from your phone. Range is short with no remote access on its own, so it's often paired with a hub or bridge.
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Compatibility guide
Which platforms does it work with?
Works with shows the smart home platforms a device pairs with, so you can control it from the app and voice assistant you already have. Here's what each one is.
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Apple Home
Apple ecosystemPairs with Apple Home, so you control it from the Home app and Siri across your Apple devices. Look for this if your household runs on iPhones.
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Google Home
Google ecosystemWorks with the Google Home app and Google Assistant, for voice control through Nest speakers and displays or your Android phone.
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Amazon Alexa
Alexa voicePairs with Amazon Alexa, so you can control it by voice through any Echo speaker or display and the Alexa app.
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Samsung SmartThings
SmartThings hubWorks with Samsung SmartThings, controlled from the SmartThings app. Handy if you've already built your setup around Samsung phones or appliances.
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Home Assistant
Open-source hubWorks with Home Assistant, the open-source platform for people who want full local control and custom automations. More hands-on, very flexible.
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Power guide
How is it powered?
Battery-powered devices go anywhere. Anything that needs a cable has to sit within reach of a power point.
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Battery
No wiringRuns on its own batteries, so it mounts anywhere without a cable or a power point. You change the battery every year or more, depending on the model.
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Battery guide
Which battery does it take?
Most sensors run for a year or more before the battery needs changing. The size decides where you can buy a spare.
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AA
Standard sizeThe standard cylindrical battery, and the easiest size to find a spare for.
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AAA
Slim sizeThe slimmer cylindrical battery, used where a sensor needs to stay small. Just as easy to find as AA.
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IP rating guide
What does the IP rating mean?
An IP rating tells you how well a light is sealed against dust and water. The first number covers dust, the second covers water, and higher is better on both. Here's what each one can handle.
- IP54 Dust-protected · splashproof
IP54
Dust-protected · splashproofKeeps most dust out and shrugs off splashes, a good all-rounder for covered patios, alfresco areas and sheds. Not built for direct water jets.
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More about Synced temperature & humidity
Smart temperature & humidity for Australian homes.
Temperature & Humidity, curated
Every temperature & humidity product here is chosen for protocol-clean Australian installs. What stayed after real use, ships.
Matter, Zigbee, Thread, Wi-Fi
Everything here works with Apple Home, Google Home, Alexa and SmartThings. Read the protocol guide before you buy.
Free shipping over $150
Free Australian shipping on orders over $150.
Two-year cover
Two-year warranty, and 30-day returns on unused items.
What you can do with them
Lights that come on as you walk in, softer late at night
A sensor turns the bedroom or hallway light on as you walk in, at full brightness in the evening and a low glow at 2am. Fit Philips Hue bulbs and a motion sensor, or keep your lights and add a Shelly dimmer and presence sensor. Control with any of
A roof-space fan that runs when the roof gets hot
A temperature probe in the roof space switches the exhaust fan on when the air up there gets hot, and off again once it cools. It runs on the relay itself, so it keeps working without the internet. Control with any of 
Run the pool pump when it costs less
The pool pump is one of the hungriest circuits in most houses, so schedule its runs into off-peak windows and see what each one uses. Changing the season's run times happens from the couch, not the pump shed. Control with any of 
A warm towel rail on winter mornings
Schedule the rail for weekday mornings and it's warm when you step out of the shower, off again before you leave. No more discovering it's been heating an empty house all day. Control with any of 
Bathroom fan that clears the steam, then turns itself off
The exhaust fan keeps running after the light goes off, long enough to clear the steam, then shuts itself down. Add a humidity sensor and it only runs when the room needs it. Control with any of 
Outdoor lights on at sunset, off at midnight
Porch, path and garden lights follow the sun through the year without you touching a switch. Run the lights you have from a Shelly relay, or fit Philips Hue outdoor lights, and set it up in their app or Home Assistant. Control with any of 
Water the garden on a schedule
The relay's dry contact drives standard irrigation solenoids, so beds and lawn water on a schedule without a dedicated controller. Rain coming? Skip the next run from your phone. Control with any of