If you want to make your own system for doing so, Instructables user ICStation shows off how to use an Arduino to do it. The system here monitors temperature, humidity, and smoke levels and alerts ...

The Anavi Thermometer Development board is fully compatible with the Arduino IDE ... It comes with a built-in DHT22/AM2302 temperature and humidity sensor and has slots for a mini OLED display ...

Texas Instruments has introduced a low-drift humidity sensor, the first in a family ... of 1.62 to 5.5V and the widest temperature and humidity range at ±1.5% relative humidity”. Taking a look at the ...