Weather-based controllers make watering adjustments based on local weather conditions. They adjust the irrigation schedule to deliver only enough water to meet the lawn needs.
With programming for each zone's plant type, soil, slope, and shade or sun exposure, these controllers promote a healthier landscape that uses less water.
How Weather Data is Obtained
On-Site Weather Monitors
Sensor-based controllers use an onsite weather monitor to calculate real-time factors and adjust irrigation timing. The factors include temperature, rainfall, humidity, solar radiation, and soil moisture. These controllers often rely on historic weather information programmed for that site’s location in the memory and modify daily irrigation requirements based on its sensor’s readings.
Signal Based Off-Site Weather Data
A signal-based controller receives regular updates via radio, telephone, cable, cellular, web, or pager signal from a local weather station or a network of weather stations. Sometimes, a monthly or yearly subscription fee covers the cost of servicing the evapotranspiration data transmitted to the controller.
On-Site Soil Moisture Sensor
Moisture-based controllers use a moisture sensor to measure the water content of the soil. This measurement determines the amount of water necessary to replenish the soil. The sensor typically is wired electronically from the sensor to the controller.
According to SWAT, controllers for smaller applications have become available more recently, and field testing has proven they can successfully reduce outdoor water use - by as much as 20%-40% annually - while maintaining, and often enhancing, the health and beauty of the landscape.
Questions or Concerns
If you have any questions or concerns about finding the right controller technology for you, please contact us by email or by calling 972-292-5800.