SMRT-Y Soil Moisture Sensor

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

Model Comparison

  • SMRT-Y: Soil Moisture Sensor Kit
  • SMRT-YI: International Soil Moisture Sensor Kit