I need a temperature/humidity sensor that will have high reliability and high accuracy for continuous use of weeks at a time. I have a test build right now that uses the AM2302 sensor from Adafruit, but the sensor failed the other day during testing (at least, as far as I can tell it failed. Any script that I run that uses the DHT read_retry command will never return a value, and it won't crash, it seemingly just keeps retrying over and over again). Additionally, before it failed, when I compared the temperature results it was relaying compared to a high accuracy probe thermometer from Thermoworks (calibrated at 0 C and 100 C), it was usually off by several degrees. I'm not sure if this was because of lag time in the readings or just plain inaccuracy.
I'm looking for recommendations for sensors that are high accuracy, fast response (preferably on the order of seconds), and will be reliable over the course of weeks when used in high humidity (>50%) conditions. The accuracy and response rate of the temperature sensor is more important the humidity sensor. The humidty sensor can be anything +/-5% and a response time on the order of minutes would be ok, as long as it is similarly reliable.