LEIT-2 ET Weather Based System

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weather-based, ambient light (solar) powered wireless irrigation controller

The LEIT-2ET is a weather-based, wireless irrigation controller that adjusts daily irrigation programming according to real time weather information provided locally by the LEIT WWS or LEIT WWSE wireless weather stations. The LEIT-2ET weather based wireless irrigation control system comprises the LEIT-2ET weather based two-station ambient light (solar) powered irrigation controller with a rain sensor connection, the LEIT RC2ET handset, and the LEIT WWS or LEIT WWSE ambient light (solar) powered weather station. The LEIT-2ET controller can receive and store weather information data from a LEIT weather station every hour during daytime hours from a distance of up to 350' (100 m) line of sight. Site information, provided by the LEIT RC2ET handset, is combined with the weather station data to calculate the daily local microclimate evapotranspiration (ET) and automatically adjust the daily irrigation schedule.

LEIT-2 ET System Overview

See Detail on LEIT RC2 ET handset
See Detail on the LEIT WWS - Wireless Weather Station

How much light is needed?

The LEIT controllers are unique to all other water management and irrigation control systems because of their ability to harness ambient light to generate electricity. The electricity is stored in a long life non-battery based Super capacitors and used to power the controller. This feature allows the LEIT 2 system to operate day and night in any area, in any weather conditions, 7 days a week, 24 hours a day. On a normal day with direct sunlight, an average range of 5,000 - 100,000 lux can be measured. The LEIT 2 controller requires an average of 3,000 lux for normal operation.

Light illumination is measured in terms of lux (lx) or foot-candles (fc). A lux is equal to the total intensity of light that falls on a 3.5 square feet (one square meter) surface that is one foot away from the point source of light.

Made in California, U.S.A.

LEIT-2ET

Two station wireless controller with 18" (45 cm) valve and sensor wires


Features:

  • Power is provided by an efficient photovoltaic module (PVM) and microelectronic management system fueled by ambient light (solar)
  • Operates up to two (2) stations and a sensor without AC power hookup, batteries, or conventional solar panels
  • Two (2) independent programs with four (4) start times per program
  • Used with Unimax S-305DC solenoids, which mount on most brand name valves using one (1) of seven (7) valve adapters
  • Client ID enables the user to assign a unique identity code to the controller and handset; this is a security feature, which locks out unauthorized users
  • The LEIT-2ET controller uses information transmitted from the weather station sensors and the LEIT RC2ET handset to override or adjust the daily scheduled irrigation program by adjusting the valve time duration in percents to compensate for evapotranspiration (ET)
  • The LEIT-2ET can monitor and receive signals from one (1) to five (5) weather stations every hour and uses the daily average data for evapotranspiration (ET) calculation
  • The LEIT-2ET controller can monitor the weather stations and when ET is set to active will alert the user via the handset if information has not been received or how often the controller has received ET information that day along with the last time information was received
  • The LEIT-2ET controller can receive information from the weather station(s) to completely stop irrigation if it is raining, freezing or too windy. This information is provided daily, every hour, during daylight hours only
  • Environmentally friendly, utilizes RoHS compliant components
  • The LEIT-2ET controller utilizes radio frequency in the ISM band 902-928 MHz (866 Hong Kong, 868 International) CE, IC, FCC certified, Australia and Hong Kong compliant
  • The LEIT-2ET controller communicates with LEIT RC2ET handsets and weather stations at a distance of up to 350 feet (100 m) line of site by way of radio communication
  • The LEIT-2ET controller functions both day and night in any weather and in most outdoor locations
  • Default program: five (5) minutes per day with a start time of 9 AM on valve one (1) with no previous programming, if ID has been assigned
  • Non-volatile memory retains program and controller integrity (excluding time)
  • Program stacking feature prevents hydraulic overload
  • Custom grouping of the two (2) stations allows the controller to operate the two (2) valves at the same time if hydraulic limitations are not exceeded
  • Available with 18" (45 cm) color-coded 16 gauge wires for each valve and rain sensor
  • Built from tough, rugged material and is resistant to harsh environmental conditions
  • Completely waterproof, complies with IP68 requirements
  • The LEIT-2ET has three (3) mounting configurations including green, tan and purple valve box mounts, direct-to-valve clip mounting and column mounting with 25" (63 cm) or 50" (127 cm) mounting columns
  • Three-year manufacturer's warranty


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