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Specification | Installation

Accurate - Reliable - Smart

It’s time for a little feedback from the roots. With the new SMRT-Y Soil Moisture Sensor Kit from Rain Bird, an irrigation controller is directly linked to the absolute moisture requirements of a site’s vegetation.

When the sensor detects dry conditions, the next scheduled watering cycle is allowed. If a site’s soil moisture level is above the threshold, the irrigation cycle is suspended. There are just two basic components: an in-ground sensor and a user interface at the controller.


  • Turns any controller into a water saving smart controller
  • Healthier landscapes less prone to nutrient depletion, fungus, and shallow root growth
  • Typical water savings exceed 40%
  • TDT digital sensor enables highly accurate readings that are independent of soil temperature and electrical conductivity (EC)
  • Displays soil moisture content, soil temperature and EC
  • Corrosion-resistant in-ground sensor made of high-grade 304 stainless steel

Operating Specifications

  • 25 Volts AC at 12W
  • Operating temperature: -4°F to 158°F (-20°C to 70°C)
  • Survival temperature: -40°F to 185°F (-40°C to 85°C)


  • cULus [US and Canada], FCC Part 15b [US], CE [European Union], Smart Approved WaterMark [Australia]

SMRT-Y Kit Includes

  • Controller Interface
  • In-Ground Soil Moisture Sensor
  • Anodized, rust-proof screws, 1.5" (two per package)
  • Wire nuts – 5 blue, 2 gray, 1 yellow
  • Multilingual instruction manual, “Quick Start” Guide, and Soil Moisture sticker

Controller Interface Dimensions

  • W: 3.0" (76mm); H: 3.0" (76mm); D: 0.75" (19mm)

In-Ground Soil Moisture Sensor Dimensions

  • W: 2.0" (50mm); L: 8.0" (200 mm); D: 0.5" (12mm)
  • 18 AWG wire leads @ 42 in. (106.7 cm) length

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