Humidity sensor for wet environment I've had a bit of experience with DHT11/DHT22 sensors in a greenhouse environment, and believe that when they get wet they stop working altogether.

Are there any low cost humidity sensors that I can hook up to an Arduino that don't suffer from this problem, or is there a way to protect these sensors from damage when near water? (I'm not talking about immersing them in water - but do expect condensation to get sprayed with water and/or get condensation on them from time-to-time).

Am I correct that the SHTxx sensors are able to withstand this kind of abuse, and that these sensors are about 5-10 times the cost of DHT sensors?  (I did not want to spend that much, but if it's the only possibility I might consider it).
I'd consider using Bosch BME280 digital sensor. Although it's a bit expensive, it has very good sensitivity, precision and amazingly fast response for humidity changes (for ex. in my project it detects dry human hand lying in 2" away within a 1-2 seconds).

So its features make possible to put it into an enclosure to avoid direct water contact with water spays and it'll still be very responsive for greenhouse needs, I suppose.
Datasheet warns:


  Liquids shall not come into direct contact with the device. 


Also, I'd use electronic-friendly protective acrylic lacquer (Plasticote 70 for instance) and put two layers to sensor's PCB, avoiding small black tiny vent hole on the chip itself:


UPD: Here's DHT11 with cover removed:


It might be the easiest and cheapest solution to cover all internal contacts and IC (avoiding humidity sensor's stripes) of DHT11 with Plasticote 70.