I'm planning on making a wireless weather station with a sensor node and a master to display the sensor data. The sensor node would be placed outside and measure temperature, humidity, and air pressure. As I'm living in Finland, the weather can vary quite much with temperatures between +30 to -30 °C and humidity up to 100%. This brings some challenges to the design and component choices.
The temperature sensor and the pressure sensor can both be placed inside a water-proof enclosure without it affecting the measured values. The humidity sensor would need to be placed outside of the water-proof part of the enclosure, ensuring correct measurements. Therefore, I'm wondering how weather-proof humidity sensors like the HS3004 are. The datasheets often recommend using the sensor in some temperature range that is above 0°C. Where can I look for components which can handle this environment? Is there some standard I should look for?