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  Hunter ET-System ET Sensor with Outdoor Interface ET Module
Hunter ET System - ET Sensor with Outdoor Interface ET Module

Our Price: $257.77

Product Code: ET-SYSTEM

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Automatically shuts down irrigation system if an overflow condition occurs.

A ruptured pipe or broken sprinkler that is left undetected can result in a substantial amount of damage. Plants and ground cover can be flooded; a slope can be eroded; even solid surfaces such as sidewalks or driveways can be undercut. The installation of a Flow-Clik can help identify a break before any damage can occur. The Flow-Clik is user-set to activate at a specified level of flow; once that level is exceeded; the electrical circuit is broken and the valves are shut off. As a result; the amount of water loss in the event of high external leakage would be substantially reduced.








Hunter ET System - ET Sensor with Outdoor Interface ET Module

with Outdoor Interface Module


Manual (455.9 KB)



  • Calculates Evapotranspiration (ET) for your local microclimate
    Automatically creates a scientific program and downloads it to your standard sprinkler 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 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

  • 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

  • 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)


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

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 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.

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.

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.


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