ET Weather Stations

Evapotranspiration (ET) is regarded as water loss from the Earth's 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

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.

RG1 Tipping Bucket Rain Gauge

RG1 Tipping Bucket Rain Gauge

The Standard RG1 Rain Gauge was designed as a universal rain gauge, that is suitable for most applications. There are two versions of the RG1 available: 0.2mm and 0.1mm.

TR1 SEN-R Temperature and Relative Humidity Sensor (Discontinued)

TR1 SEN-R Temperature and Relative Humidity Sensor (Discontinued)

The new TR1 temperature and relative humidity (RH) sensor is a highly accurate sensor with excellent long-term stability for a very competitive price.

WIN Windspeed and Direction Sensor

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.

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