Customer:
I purchased items from you about six months ago and decided to provide feedback. I noticed an error in a product description: the product is labeled as a humidity sensor, but it is not a humidity sensor—it is a rain sensor. The sensor does not respond to humidity levels at all.
I conducted a test by connecting the sensor to a comparator at 5V. I heated water in a kettle and placed the sensor inside it, closing the lid (above the water). Humidity was at maximum but the voltage did not change. The voltage only changes when the sensor gets wet, when a sufficiently large drop lands on it, or when it is literally submerged in water. The droplets that formed on the sensor while inside the kettle were too small for the sensor to respond.
Even searching “rain sensor” on Google returns results for this same sensor labeled as a humidity sensor (which it is not).
Also, since we are discussing rain sensors, it would be good if the dimensions were larger.
Original message (Croatian)
Poštovani, prije cca pola godine sam od Vas naručio hrpu stvari, pa reko, idem napisat koji review. No odlučio sam se da je možda ipak bolje ovako Vam ukazat na grešku u opisu proizvoda. Naime radi se o proizvodu (Soldered: Open-Source Electronics, Boards, Sensors & Modules – Soldered Electronics U opisu piše da je to senzor vlage, no, to nije senzor vlage. Prije senzor kiše. Senzor uopće ne reagira na količinu vlage.
Napravio sam pokus. spojio sam senzor sa komparatorom na 5V. Zagrijao vodu u kuhalu za vodu i doslovno stavio senzor u kuhalo i zatvorio (iznad vode). Vlažnost je bila maksimalna no napon se nije promijenio. Napon se mijenja tek kada se senzor namoči, kada na njega dođe dovoljno velika kap, ili kad ga se doslovno uroni u vodu. Kapi koje su se stvarale na senzoru dok je bio unutar kuhala za vodu su bila previše mala da bi senzor reagirao.
Čak i kada se googla “rain sensor”, dobivaju se rezultati ovog istog senzora za vlagu (koji to nije).
A kad smo već kod senzora za kišu, nebi bilo loše da bude malo većih dimenzija.
Nadam se da sam bio koristan i želim reći da mi je baš drago da u hrvatskoj postoji jedna ovakva firma.
Originally submitted via email support on 17 August 2020. Migrated to the forum for community visibility.