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Weathermatic SLW1 wired on-site weather station mounted on adjustable aluminum arm showing white solar shields and rain disk.

Weathermatic SLW1 Wired SmartLine Weather Station Sensor

Brand: Weathermatic
Save 27%
$290.99
$210.97
SKU SLW1

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The Weathermatic SLW1 is a wired on‑site weather station designed for SmartLine irrigation controllers. It records and processes local temperature and rainfall to enable ET-based watering and automatic Smart mode adjustments, preventing irrigation during rain or freezing conditions.

  • Adjustable rain shutoff: factory 1/8" setting; selectable from 1/8" to 3/8" (3–19 mm) to stop irrigation after the specified precipitation.
  • Freeze protection: activates at 37°F (1.5°C) to pause irrigation and notify the controller until temperatures recover.
  • Reliable operation: microprocessor-driven with onboard diagnostics; no onboard batteries—operational power is provided by the controller.
  • Easy installation: supplied with 35 ft (10.7 m) UV-stable cable and adjustable aluminum mounting arm for gutter or surface mounting; maximum controller distance 200 ft.
  • Daily ET calculations: computes evapotranspiration on-site and transfers daily deficit values to SmartLine controllers to optimize run times and conserve water.
  • Serviceable design & warranty: replaceable rain disk assembly and a two-year manufacturer limited warranty for peace of mind.

Compatible with SmartLine controllers and intended for commercial or residential outdoor installation, the SLW1 simplifies irrigation management by delivering on-site weather intelligence that protects landscapes and reduces water waste.

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Frequently Asked Questions

What does the SLW1 measure and how does it help irrigation?
Measures on-site temperature and rainfall; computes daily ET deficits and signals controllers to pause watering during rain or freeze.
How is the SLW1 wired to SmartLine controllers?
Connects via the supplied 35 ft 2‑conductor cable to the SLHUB1 communication hub; power and data are provided by the controller.
Does the SLW1 require batteries or regular maintenance?
No onboard batteries; it's powered by the controller. The rain disk is replaceable; routine cleaning is minimal.