Turf Weather Station

Automated water management depends on precision climate measurements.


High-quality ET Weather Stations measure conditions that affect evaporation and transpiration.  Turf Weather Station sensors measure; solar energy, wind, humidity, temperature and rainfall. 








Overview

Turf Weather Stations are a solar powered station with replaceable sensors. Electronics are housed in a plastic UV resistant outdoor enclosure mounted to a 3-meter pole. These weather stations feature:
  • Mechanical sensors for a cost-effective solution
  • Industrial-grade design
  • Easy installation and maintenance
  • High reliability

Communication Options
Weather Reach Servers retrieve weather data stored in the station's datalogger. 

  • Cellular IP – A cellular modem enables communication via the Internet.
  • Spread Spectrum - Enables wireless point-to-point communications to a computer.
  • Network - Internet connection via TCP/IP.

Models

Models Description
WR-TW-W Turf Weather* Wireless Weather Station w/ Solar Power 
WR-TW-CDMA Turf Weather* Cellular IP Weather Station w/ Solar Power - CDMA
WR-TW-GPRS Turf Weather* Cellular IP Weather Station w/ Solar Power - GPRS
WR-TW-W-N Turf Weather* Station - Solar Power w/ Spread Spectrum Radio & Network Link

Contact us for custom configurations.

* Turf Weather is a Trademark of Campbell Scientific. Inc. 


Specifications

  • Wind Speed is measured by a three cup rotating anemometer.  The rotating component of the sensor spins in response to the wind and turns a magnet within a coil to generate a sine wave output proportional to velocity.  This technique is well proven and reliable under normal conditions, but the rotating component can lock up in freezing or icy conditions.
  • Wind Direction is measured by a sensor consisting of a vane connected to a wire wound resistor.  As the vane turns on its pivot point the resistance increases or decreases with respect to wind direction. This is translated by the weather station into a measurement in degrees with respect to a datum, typically magnetic North, which is physically established when the weather station is installed.
  • Rainfall is measured with a tipping bucket rain gauge.  During a rain event drops are captured in a funnel of a know size and directed through an orifice to form a drip stream. This drip stream flows into a volumetric measurement device (a tipping bucket or spoon), which fills with a calibrated amount and then tips.  The tipping motion dumps the water and activates a switch which produces an electrical pulse.  The water then drains from the bottom of the rain gauge and the mechanism returns to its “catch” location to fill again. The pulses are counted by the weather station and multiplied by the known volume of the tipping bucket to produce a rainfall amount, and when compared to time, a rainfall rate.
  • Air temperature and relative humidity (RH) sensors are combined in an integrated, user replaceable unit that requires no calibration.  The RH sensor is a thin polymer, resistive sensor that degrades with exposure due to age and airborne contaminates. It should be user replaced every 18-24 months to maintain accuracy, and at a shorter interval if the location is subject to high levels of air pollution or is subject to airborne chemical spraying.  The air temperature sensor is a fine wire thermistor, with a rapid response, and it is typically not subject to environmental degradation.
  • Barometric pressure is measured with a capacitive silicon temperature corrected strain gauge device that is typically not degraded by environmental exposure and does not require calibration after manufacture.
  • Solar Radiation is measured by a scientific grade silicon pyranometer with a cut filter limiting the spectral exposure to the 300-1100 nm wavelength.  This device typically degrades at a rate of 2% of the full scale value each year and should be recalibrated, or replaced every 3-5 years, depending on the application.