ET Weather Stations
Evapotranspiration (ET) is regarded as water loss from the Earths surface from evaporation and plant transpiration. Evapotranspiration is typically expressed in mm/day or inches/day. Although all weather station parameters are required for accurate evapotranspiration monitoring, air temperature and humidity, solar radiation and windspeed and direction are required in the Penman Monteith method of computing the reference evapotranspiration (Eto). The Penman Monteith method of ETo computation is based on two equations: (i) an energy equation (solar radiation) and an aerodynamic equation (using wind and air humidity). Soil moisture probes and other sensors (like dendrometers) are also being used today to fine tune ETo. ETo stations are often used for predicting irrigation scheduling and disease monitoring in agriculture. A typical ETo station is therefore composed of the following components: A753 addWAVE RTU with solar panel SEN-R Combi sensor for air temperature and humidity SP-Lite Silicium-Pyranometer from Kipp&Zonen WIN Combi sensor for wind speed and direction RG Rain gauge Pole set to mount the station
A753 GSM GPRS Telemetry Data Logger
A GSM / GPRS telemetry datalogger for use in a wide variety of water monitoring and meteorological applications. With a range of power supplies including lithium battery, the A753 telemetry datalogger can go anywhere and also provide power to any attached instrumentation.
WIN Windspeed and Direction Sensor
The WIN Wind Speed and Direction sensor is constructed around an AC generator (without brushes) and a rectifier, and all external sensor parts are made of highly resistive plastics.
PR Pyranometer SP-LITE
Manufactured by Kipp & Zonen, the SP-Lite pyranometer is a silicium-pyranometer that can be used under all weather condition for solar radiation (sunshine) measurement.
