The information about time related sensors precision and the need for calibration can be found in this application note Sensor accuracy over time.
You can also get a sensor with protocol of calibration.
HTemp-485 T3419
Temperature and humidity sensor HTemp-485 T3419. IP40 allows outdoor usage. Measured values are shown on a display and transmitted to the system over RS-485. Based on temperature and humidity measured, sensor calculate dew point, absolute humidity or specific humidity. Temperature range -30°C to +105°C. The sensor can be used alone or with Poseidon units.
Features:
- Temperature and humidity probe with RS-485 connectivity and a display showing actual values
- Display on the sensor body, showing actual measured values
- Easy wall mounting
- IP65/40 protection for outdoor use
Applications and usage:
- Outdoor temperature monitoring
- Wide-range monitoring systems with number of measurement points
- Independent monitoring of food and crop stores, food manufacturing and processing
- Temperature and humidity monitoring of medical material and pharmaceutical stores
- Environmental monitoring of residential areas