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ETo & Weather Monitoring
Measurement Instrumentation for Real-time ETo Calculations
Campbell Scientific measurement and control systems are used worldwide for climatological, agricultural, and
meteorological monitoring. Our evapotranspiration monitoring stations provide an accurate method of identifying
crop water needs, helping to eliminate under- and over-watering mistakes, which in turn saves money and improves
quality of turf grass and other crops. Our stations are used by golf courses, commercial farms, municipalities,
utilities, and home-owner associations to help manage irrigation scheduling while promoting sound water and
groundwater management.
Station Benefits
- Accurate hourly and daily summaries of water needs are provided.
- Stations calculate ETo on-board using Penman-Monteith equation.
- Data can be transmitted to a computer and/or a voice-message can be sent to a phone.
- Stations are easy to install and maintain.
- Software facilitates programming, data retrieval, and data display.
- Preconfigured or custom stations are available.
- Stations operate reliably in harsh environments.
- Low current drain allows long-term operation using batteries and solar panels; the stations can also use ac power.
Evapotranspiration
Our ET stations provide continuous monitoring of temperature, solar radiation, rainfall, relative humidity, and
wind speed and direction. Using these measurements, an on-board program calculates potential evapotranspiration
ETo using the Penman-Monteith equation. The resulting output provides hourly and daily assessments of water needs.
ETo estimates are based on turf grass, but crop coefficients can be used by the station to estimate the water needs
of other crops.
We also offer a low-cost, station that calculates ETo from a reduced set of sensors and a modified Penman Monteith
equation.
Weather
ET stations can also provide information for other uses. Data relevant to integrated pest management, disease prediction,
growing degree days, and frost forecasting are easily obtained. Stations can also report general weather data such as
average wind speed and direction, maximum wind gusts (useful for fungicide, pesticide, and fertilizer applications),
maximum and minimum temperatures, and total solar radiation.
We offer both preconfigured and custom ET stations. Our preconfigured stations feature a standard suite of pre-wired
sensors, quick-and-easy installation, and simplified programming. While these stations are preconfigured, they are
flexible enough to accommodate additional sensors or other ETo calculation algorithms. For example, soil moisture
sensors can be added to provide additional water management information, or soil temperature sensors can be used to
estimate pest emergence.
Custom stations, typically used for research, are configured from a wider selection of components, allowing greater
flexibility. These stations can be configured to measure almost any number or type of sensor and can use many different
types of communications options.
Communications
Data from our stations can be transmitted to and displayed on a computer using a variety of options
including:
- Telephone
- Cellphone
- Voice-synthesized phone
- Radio
- Short haul
- Satellite
- Internet connection
- Storage modules
Voice-synthesized phone modems that can give you a verbal report of conditions are commonly used with our ET stations.
For example, stations at golf courses can be used not only for water management, but to allow customers to call for a
real-time verbal report of weather conditions at the course. These stations can also transmit data to a computer.
Software
Our PC-based support software simplifies the entire weather monitoring process,
from programming to data retrieval to data display and analysis. Our software can automatically manage data collection
from station networks or individual stations. Robust error-checking ensures that your data arrives uncorrupted. We can
even help you post your data to the Internet.
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Phone: (780) 454 2505