Hunter ET System
Hunter Product Manual

Gathers weather data on site, continuously calculates the ideal program for your landscape

Take the guesswork out of irrigation scheduling; by tracking your local microclimate and automatically calculating a scientific irrigation program! The Hunter ET System is an easy-to-add-on accessory (for any Hunter controller that operates with a SmartPort® system) that measures key climatic conditions; and uses them to calculate your local Evapotranspiration (ET) factor. The ET is then downloaded into your irrigation controller to create an irrigation program that is just right for your sprinkler system; plants; and soil conditions. By taking into account the rate at which water is consumed by weather conditions; the ET System will initiate a new schedule to replenish only the water that is actually needed. And our WiltGard™ technology can intervene to trigger protective watering when extreme conditions threaten your plants. The result is a dramatic savings in your water bill (about 30%; on average); healthier root zones; and your participation in conserving our precious natural resources.

Features and Benefits

Calculates Evapotranspiration (ET) for your local microclimate Automatically creates a scientific program and downloads it to your standard irrigation controller Saves water and money Minimizes water waste; applies just the water your plants need WiltGard™ technology Enables it to trigger protective watering when extreme conditions threaten your plants True station-specific database determines appropriate watering ET information combines with each zone’s particular plant; soil; sun; and sprinkler data Easily upgrades most Hunter irrigation controllers to weather–based control No high voltage AC wiring required Non-volatile memory Retains your program and site information in event of a power failure

Weather Data at Your Site (Not from Somewhere Else) Hunter's ET System requires no subscription fees; and is not based on any form of broadcast or other distant weather data. Your irriga­tion schedule is based on actual conditions in your landscape. The ET System was designed to exceed standards developed by the Irrigation Association and government agen­cies; using Smart Water Application Technology to minimize waste; while creating healthier landscapes.

No More Sprinklers Running in the Rain! Each ET System has a simple user interface; so you can select from a menu of common sprinkler; plant; and soil types; or create your own custom factors. The irrigation system’s sensor array includes solar radiation; relative humid­ity; temperature; a rain gauge that tracks precipitation; plus an optional anemometer for wind speed. The ET System stops wasteful irrigation after naturally occurring rainfall; and automatically resumes sprinkler operation when conditions return to dry.		Upgrade any of These Standard Hunter Controllers to Weather-based Control SRC/SRC Plus Controllers Pro-C Controllers ICC Controllers ACC Controllers
	ET and Irrigation: Working with Climate Plants evaporate moisture through their leaves; and replenish it through their roots. In turn; conditions such as temperature; humidity; and wind dictate the rate at which the plants lose their moisture. ET-based irriga­tion measures these conditions and replenishes only the amount of water lost to plant evaporation. Factors such as the precipitation rate of your sprinklers; the crop coeficient of your plant types; and the infiltration rate and holding capacity of your soils are taken into account with simple menu
Evapotranspiration and Hunter: Leading the Way Evapotranspiration is a formula; based on weather conditions; which has been created through exhaustive research and experimen­tation by irrigation professionals. ET has come to symbolize the “best practice” for determining landscape watering needs. Hunter helped to pioneer this field of auto­matic irrigation, and has ofered ET-capable irrigation controllers for over 15 years. Now; the ET System brings this proven technology to a simple; afordable package that lets all of us irrigate responsibly.

Models

ET SYSTEM – ET Sensor with outdoor interface ET Module
ET WIND – Optional anemometer for wind speed

Dimensions

• ET Module – 6" H x 4" W x 1.75" D (153 mm H x 102 mm W x 45 mm D)
• ET Sensor – 10 1/2" H x 7 1/4" W x 12 1/8" D (26.7 mm H x 18.4 mm W x 30.8 mm D)
• ET Sensor with pole brackets – 10 1/2" H x 7 1/4" W x 13" D (26.7 mm H x 18.4 mm W x 33.0 mm D)
• ET Sensor with ET Wind – 11 1/2" H x 7 1/4" W x 19 7/8" D (29.2 mm H x 18.4 mm W x 50.5 mm D)
• ET Sensor and ET Wind with pole brackets – 11 1/2" H x 7 1/4" W x 20 3/4" D (29.2 mm H x 18.4 mm W x 52.7 mm D)

Specifications

• Power Input: 24 VAC; 50/60Hz (from host controller)
• Current draw: 20 ma; max
• Non-volatile memory
• Replaceable 10-year lithium battery
• Wiring:
  ET Module power; SmartPort
  ET Sensor; 2 x 18 AWG/1 mm
• Max distance; ET Module from controller: 6 ft./2 m
• Max distance; ET Sensor from module: 100 ft./30 m