Relative Humidity, Barometric Pressure, Air Temperature, and Vapor Pressure
Use the rugged VP-4 sensor with soil moisture probes in microclimate and evapotranspiration studies.
Integrate into non-Decagon data loggers with the easy-to-use SDI-12 communication protocol.
This 5 cm x 2 cm sensor is able to fit into the smallest of spaces.
Thanks to its unique Teflon screen, the relative humidity sensor can
survive a deluge. Naturally, it won't be transmitting accurately while
waterlogged; but as soon as it has dried out, it's back in the game.
The Teflon screen protects the sensor from liquid water and dust
without limiting diffusion of water vapor. The protected sensor is still
able to quickly respond to changes in humidity.
Integrated Temperature for Accuracy
Accurate relative humidity readings require accurate air temperature
readings taken at the same place and time. This sensor takes both
measurements simultaneously for the best possible accuracy.
Radiation Shield Included
The included radiation shield is designed to improve air temperature
readings by minimizing radiation and maximizing airflow over the surface
of the sensor. Specially designed to preserve the correlation between
actual air temperature and sensor air temperature while keeping the
shield size small.