Interested in reviews of RETLUX RSH 309 Smart temperature sensor? It got 4.4 out of 5 stars from our customers. Find specific customer reviews of RETLUX RSH 309 Smart temperature sensor below. We will appreciate if you also share your experiences with RETLUX RSH 309 Smart temperature sensor after purchasing.
Rated 10/02/2026, variant RETLUX RSH 309 Smart temperature sensor
Verified purchase
I have to return, unusably large measurement deviation
ease of connection to the central unit
communication in the TUYA system
very inaccurate temperature measurement (compared on verified gauges)
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Reply from Alza
21/02/2026
Hello, thank you for your suggestion, on the basis of which the supplier contacted us and would like to respond below.
"We are sorry that your RSH 309 piece does not measure accurately. Our engineers have tested this model thoroughly and such deviations should not occur as standard. If the measured values are significantly off even after changing the sensor location away from drafts or heat sources, it looks like a defective piece. We're sorry, but we'll be happy to work it out with you. Please send it to us for complaint or contact us directly at support. We'll get you a working replacement in no time. Thank you for your understanding and we will try to fix everything as soon as possible. "
Please do not hesitate to contact us in case of need. Thank you and have a nice day, Ondřej - Alza expert
Jana, Olomouc
Rated 19/01/2026, variant RETLUX RSH 309 Smart temperature sensor
Verified purchase
I can definitely recommend it, for the price it's unreal
I can't fault anything
price
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Radek, Brno
Rated 12/01/2026, variant RETLUX RSH 309 Smart temperature sensor
Verified purchase
The sensor works reliably, we know immediately what the temperature and humidity is at home. The great thing is that it sends an alert when something changes, so we have peace of mind even when we're not at home: -)
reliable piece
a lot of music for little money
I don't know about anything
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Pavlína, Praha 4 - Braník
Rated 10/01/2026, variant RETLUX RSH 309 Smart temperature sensor
Verified purchase - review from a price comparison website
It works exactly.
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Jan, Liberec
Rated 14/12/2025, variant RETLUX RSH 309 Smart temperature sensor
Verified purchase
Full support in HA
Large battery
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