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SmartHomeScene tested 12 battery-powered Zigbee temperature and humidity sensors from Aqara, Sonoff, Tuya and other brands against a reference sensor, with an update adding fridge-temperature benchmarks. The report describes a controlled comparison, but its single calibration point was around 4°C, so the results do not establish how accurately every device measures typical room temperatures.
SmartHomeScene has updated its comparison of 12 best-selling Zigbee temperature and humidity sensors, adding measurements at fridge temperatures to its head-to-head tests. The report compares devices from Aqara, Sonoff, Tuya and other brands against a calibrated reference, offering smart-home buyers a common testing basis while warning that a calibration point near 4°C does not establish accuracy across normal room temperatures.
The lineup includes products from Aqara, Sonoff, Tuya, ThirdReality, Zemismart and Moes. All 12 are battery-powered Zigbee sensors without displays. The report says all cost less than $15 on AliExpress except ThirdReality’s Temperature and Humidity Sensor Lite, listed at $19.99. Prices are taken from the author’s purchases and may vary by region.
For the comparison, the author placed the sensors in an office beside a Xiaomi Miaomiaoce MHO-C401 reference unit, running custom firmware and communicating with Home Assistant over Bluetooth Low Energy. That reference was checked against a lab-certified thermometer used in a commercial refrigerator. The reference needed adjustments of minus 0.5°C for temperature and plus 4% for humidity to match that thermometer.
The Zigbee devices were tested using Zigbee2MQTT version 2.12.1-dev and an SMLight SLZB-06MG24 coordinator. Each sat about 3.5 metres from the coordinator, on a new network with no other paired devices. The report says it compares accuracy and other practical differences, including measurement range, build, size and battery type. The supplied material does not include the full results table or specific winner, so no model can be named here as the most accurate.
Choosing a Sensor Beyond Price
A side-by-side test can help buyers compare products that are often marketed with similar features but differ in price, battery format and reported performance. The included models span a wide price range: the listed AliExpress prices run from $4.60 for a Tuya TH01 to $14.89 for an Aqara sensor, while the ThirdReality unit costs more than the stated $15 threshold.
That comparison is relevant for households using temperature readings to automate heating, cooling or alerts, and for people monitoring refrigerators. But the test’s limits matter as much as its measurements. The report presents a consistent comparison under one setup, not proof that a result will hold in every home, at every temperature or with every Zigbee network. Buyers should weigh the test alongside their own use case and compatibility needs.
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How the Comparison Was Set Up
The author says the project was designed as a head-to-head alternative to reviewing sensors one at a time. The chosen products were described as best-selling or popular options found online, mainly on AliExpress, rather than an exhaustive survey of all Zigbee sensors. The brands include established smart-home names and Tuya devices sold under multiple white-label identities.
The report explains that many Tuya sensors may appear under different retailer or brand names, even when their Zigbee model identifiers are similar. It lists packaging names and identifiers detected by Zigbee2MQTT, while cautioning that regional prices vary. The author also notes that a fixed calibration point is not a guarantee of equivalent accuracy at other temperatures: sensors may not respond linearly across their measurement ranges. In Home Assistant, a user can apply an offset, but that does not by itself establish accuracy across conditions.
““Sensors do not always respond in a perfectly straight line across a wide temperature range.””
— SmartHomeScene report
Room-Temperature Accuracy Still Open
The source material does not provide the individual readings, full rankings or a clear winner. It is therefore not possible from the supplied details to say which sensor performed best, how large the differences were, or whether one model was consistently more accurate across the tests.
The reference was calibrated at approximately 4°C, a temperature more representative of refrigeration than a typical living space. The author explicitly says this fixed point does not guarantee the same accuracy at room temperature. The available account also does not specify the duration of each measurement, the number of repeated readings, or the full range of refrigerator temperatures used in the update.
Check the Full Test Results
The report’s August 14, 2026 update adds low-temperature benchmarks taken in a fridge. Readers comparing specific devices should consult the complete SmartHomeScene report for its detailed measurements and model-by-model findings, which are not present in the supplied source extract. Any purchase decision should also account for changing regional prices and confirm that the exact device identifier is supported by the reader’s Zigbee setup.
Key Questions
How many Zigbee sensors did SmartHomeScene test?
The report compares 12 battery-powered temperature and humidity sensors from Aqara, Sonoff, Tuya, ThirdReality, Zemismart and Moes.
Which sensor was the most accurate?
The source material supplied here does not include the full results or identify a winner, so it does not support naming the most accurate model.
Does the test show how accurately the sensors work at room temperature?
Not conclusively. The reference was calibrated at around 4°C, and the report cautions that sensor accuracy may vary across a wider temperature range.
How much did the tested sensors cost?
The listed AliExpress prices ranged from $4.60 to $14.89, with one exception: the ThirdReality Temperature and Humidity Sensor Lite was listed at $19.99. The report notes that prices vary by region.
What was new in the August 2026 update?
SmartHomeScene says it added low-temperature benchmarks in a refrigerator on August 14, 2026.
Source: hn
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