How to Kill Humidity Sensors With Humidity
The article discusses how common humidity sensors like the BME280 and DHT22 can fail in high-humidity, condensing environments, as learned by [Mellow Labs] through firsthand experience in a steamy bathroom. It highlights the SHT40 sensor by Sensirion as a more suitable alternative, featuring a built-in heater to handle condensation, though with trade-offs in power use and measurement timing. The piece emphasizes the importance of reading datasheets carefully when selecting sensors for demanding conditions.
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How To Kill Humidity Sensors With Humidity 1 Comment by: Maya Posch April 29, 2026 Title: Copy Short Link: Copy An often overlooked section in the datasheets for popular humidity sensors like the BME280 and DHT22 is the ‘non-condensing humidity’ bit, which puts an important constraint on which environments you can use this sensor in. This was the painful lesson that [Mellow Labs] recently had to learn when multiple of such sensors had kicked the bucket after being used in a nicely steamed-up bathroom. Fortunately, it introduced him to sensors that are rated for use in condensing humidity environments, such as the SHT40 that’s demonstrated in the video.
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Excerpt limited to ~120 words for fair-use compliance. The full article is at Hackaday.
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