No Data Storage Fees for 5 Years! Then $2.99/Month. No App Subscription Fees.

A4 Wifi Soil Moisture Sensor with Irrigation App

$1,349

Free Shipping

Know when, where, and how much to irrigate. EarthScout with Wifi helps you irrigate in a greenhouse or nursery with confidence.

  • 3-IN-1 WIFI DATA LOGGER: Receive real time soil moisture, soil temp, and soil EC on your phone/laptop via Wifi. Add an air temp & humidity sensor for $82
  • 2 “PLUG & PLAY” DATA PORTS: Plug in up to 2 TDR Soil Moisture Sensors at one time to monitor at two soil depths
  • IRRIGATION APP: Includes interactive graphs, compare sensor data, set notifications, export data into CSV file, and more (see videos)
  • QUICK & EASY INSTALL: Installs in minutes. Includes free phone support (see install video)
  • RESEARCH-GRADE TDR SENSOR: Considered the gold standard for accuracy. Installs in undisturbed soil. No calibration or slurry required. No risk of soil dry back issues
  • CUSTOMIZABLE: Use up to 2 TDR soil sensors at once
  • FLEXIBLE DATA COLLECTION: Place TDR sensors at the soil depths you choose. Cables available in 6’ or 30’ lengths for specialty growing, research, or education
  • IDEAL FOR ANY CROP: Including peppers, potatoes, tomatoes, chilies, sweetcorn, lettuce, peas, brussels sprouts, strawberries, herbs, spices, and cannabis, shrubs and flowers
  • MADE IN USA: Proudly designed and manufactured in the USA
  • FREE PHONE SUPPORT: Our customer support team is based in Minnesota
  • 3 YEAR WARRANTY

PRICE INCLUDES:  Wifi Data Logger with 2 Plug & Play TDR Sensor Ports, Mounting Stake, 1 TDR Soil Sensor (measures soil moisture, temp and EC) with 6’ cable, Battery, 120V AC Adapter, EarthScout Irrigation App, Free Phone Support, 3-Year Warranty. To learn more, call us at 1-877-443-7632.

    A4 Accessories:

    • *

      Air Temperature/Humidity Sensor

      Plug-in this sensor to monitor air temperature and humidity. Also useful for calculating growing degree units for estimating the growth and development of crops and pests.

      $82.00 each   |  

      AddRemove

      Burial Tube (16″ x 10″)

      Once installed in the soil, quickly install or remove TDR Soil Moisture Sensors at various depths without digging another hole.

      $80.00 each   |  

      AddRemove

    $1,349.00

    Standard production time is 1-2 weeks and will be shipped via FedEx Ground. For expedited production or shipping options, please contact our sales team at 877-443-7632.

    • Features and Benefits

      A4 Wifi Soil Moisture Sensor is loaded with great benefits:

      • 10″ tall installed
      • Easy to use and install
      • Customize A4 Wifi Soil Moisture Sensor to operate up to 3 different sensors at one time (Example: 1 plug-in Air Temperature & Humidity Sensor, and 2 plug-in TDR Soil Moisture Sensors for monitoring the soil at 2 depths)
      • Connects with your Wifi to send real time soil & environment data to the EarthScout app
      • Cellular version available. Call us for details.
      • Research-grade sensors used by scientists at leading universities
      • Portable & compact
      • Power management (battery, 120V AC adapter) allows for flexible placement and redundancy
      • Mobile and desktop app is intuitive, easy-to-use, and includes the irrigation module
      • Data is stored inside the product as a backup in case of temporary outages
      • 1 year limited warranty
    • TDR Sensors

      The EarthScout TDR (SDI-12) Soil Moisture Sensor is a precision Time Domain Reflectometer (TDR) that provides highly accurate volumetric water content (VWC) measurements in soils and other porous media. Trusted by leading researchers, it offers the same TDR technology found in high-end instruments that cost thousands of dollars more. Compact yet powerful, it integrates precision TDR components and a 15 cm waveguide within a small enclosure.

      Key Advantages:

      • High-Resolution TDR Technology: Delivers 5ps resolution for precise water content measurements (up to 1.00 m³/m³), using advanced waveform digitizing and analyzing firmware for precise time-domain analysis.
      • Improved Sensitivity: Direct coupling of the TDR function to the waveguide eliminates coax cables, enhancing bandwidth, resolution, and measurement sensitivity.
      • Fast Performance: Ultra-fast rise time (150ps), rapid response (<0.25 sec), and low power consumption (0.09 J per reading) make it ideal for both field and laboratory use.
      • Robust and Reliable: VWC readings are unaffected by bulk electrical conductivity (under 1.8 dS/m) and soil compaction, eliminating the need for soil-specific calibration.
      • Durable and Energy-Efficient: Low sleep current (<10 µA) supports long battery life.

      Key Features:

      • Waveform Digitizing TDR with 5ps Resolution
      • Measures Water Content: 0% to 100% VWC
      • Reads Bulk EC: 0 to 2000 µS/cm
      • Accurate Soil Temperature: ±0.25°C
      • Supports Time Domain Waveform Download
      • Ultra-Fast Incident Wave Rise Time: 150ps
      • Fast Measurement Response: <0.25 sec
      • Low Power Usage: 0.09 J per Reading
      • SDI-12 Interface

      Measurement Functions:

      • Volumetric Water Content (VWC): 0% to 100%
      • Medium Permittivity: 1 to 80
      • Medium Bulk Electrical Conductivity (EC): 0 to 2000 µS/cm
      • Medium Temperature: -40°C to +60°C
      • Pore Water EC (Hilhorst Model): 0 to 55,000 µS/cm

      Applications:

      • Agriculture, Turf, Landscaping, Orchards, Greenhouses, Golf Courses, and Nurseries
      • In-Situ Soil Water Monitoring for Agriculture
      • High Credibility Data for CloudBased Analysis
      • Gold Standard VWC Reference
      • Replacement for Neutron Probes
      • Portable Measurements
      • Laboratory and Field Research Instrumentation

      The EarthScout TDR Soil Moisture Sensor is the gold standard for reliable, high-accuracy soil moisture measurement, offering fast, energy-efficient readings for a wide range of agricultural and scientific applications.

    • Specifications

      Weight & Dimensions:

      • Weight: 4 lbs.
      • Dimensions: 5.625”H x 5.625”W x 3.625”D.

      Electronics Case:

      • Type 4X polycarbonate water & corrosion resistant (non-submersible), UV rated case
      • Rechargeable, sealed, lead-acid battery for extended use
      • Stainless steel hardware & brackets
      • All fittings and hardware are water and corrosion resistant

      Battery:

      • Absorbent Glass Mat (AGM) technology for superior performance
      • Valve regulated, spill proof construction allows safe operation in any position
      • Power/volume ratio yielding unrivaled energy density
      • Rugged impact resistant ABS case and cover (UL94-HB)
      • Approved for transport by air. D.O.T., I.A.T.A., F.A.A. and C.A.B. certified
      • U.L. recognized under file number MH 20845
      • Nominal Voltage: 4 volts (2 cells)
      • Battery Dimensions: 1.89″L x 2.09″W x 3.70″ H
      • Weight: 1.30lbs.

      TDR Soil Moisture Sensor:

      • Sensor Dimensions: 8″L x 2″W x 0.5″D.
      • Monitors soil moisture, soil temperature, and soil electroconductivity (EC)
      • Durable, research grade sensors for use in harsh environments
      • Cables are waterproof sealed for outdoor use
      • Ground level sensors protected with abrasion and rodent resistant braiding

      Mounting Stake:

      • Plastic mount with steel rod
    • Installation

      A-Series Installation Manual:
      Learn how to install and uninstall EarthScout in a greenhouse: A-Series Installation Manual.PDF

      Battery Removal & Charging:
      Reference the following PDF for instructions on how to remove and charge your EarthScout battery:  Battery Removal & Charging.PDF

      More Questions?
      Visit earthscout.com/education-center for videos about how to install the EarthScout app, and more! Or, contact us at 1 (877) 443-7632.

    • Warranty

      What Is Covered By This Warranty?
      EarthScout warrants the EarthScout-branded product and the EarthScout-branded accessories contained in the original packaging (“EarthScout Product”) against defects in materials and workmanship when used normally in accordance with EarthScout’s published guidelines, and a period of ONE (1) YEAR from the date of original retail purchase by the end-user purchaser (“Warranty Period”). EarthScout’s published guidelines include but are not limited to information contained in technical specifications, user manuals and service communications.

      What Is Not Covered By This Warranty?
      This Warranty does not apply to any non-EarthScout branded hardware products or any software, even if packaged or sold with EarthScout hardware. Manufacturers, suppliers, or publishers, other than EarthScout, may provide their own warranties to you – please contact them for further information. Software distributed by EarthScout with or without the EarthScout brand (including, but not limited to system software) is not covered by this Warranty. Please refer to the licensing agreement accompanying the software for details of your rights with respect to its use. EarthScout does not warrant that the operation of the EarthScout Product will be uninterrupted or error-free. EarthScout is not responsible for damage arising from failure to follow instructions relating to the EarthScout Product’s use.

      EarthScout Purchase Terms
      When you purchase EarthScout there is a 1 year warranty.

    • Return Policy

      EarthScout A4 has a 10 day return policy. The 10 day return policy is void if the plastic shrink wrap around any of the sensors are torn, removed, or there are signs of product use. The customer will be charged a 15% restocking fee for any returned products, and responsible for return shipping costs.

    Features and Benefits

    A4 Wifi Soil Moisture Sensor is loaded with great benefits:

    • 10″ tall installed
    • Easy to use and install
    • Customize A4 Wifi Soil Moisture Sensor to operate up to 3 different sensors at one time (Example: 1 plug-in Air Temperature & Humidity Sensor, and 2 plug-in TDR Soil Moisture Sensors for monitoring the soil at 2 depths)
    • Connects with your Wifi to send real time soil & environment data to the EarthScout app
    • Cellular version available. Call us for details.
    • Research-grade sensors used by scientists at leading universities
    • Portable & compact
    • Power management (battery, 120V AC adapter) allows for flexible placement and redundancy
    • Mobile and desktop app is intuitive, easy-to-use, and includes the irrigation module
    • Data is stored inside the product as a backup in case of temporary outages
    • 1 year limited warranty
    TDR Sensors

    The EarthScout TDR (SDI-12) Soil Moisture Sensor is a precision Time Domain Reflectometer (TDR) that provides highly accurate volumetric water content (VWC) measurements in soils and other porous media. Trusted by leading researchers, it offers the same TDR technology found in high-end instruments that cost thousands of dollars more. Compact yet powerful, it integrates precision TDR components and a 15 cm waveguide within a small enclosure.

    Key Advantages:

    • High-Resolution TDR Technology: Delivers 5ps resolution for precise water content measurements (up to 1.00 m³/m³), using advanced waveform digitizing and analyzing firmware for precise time-domain analysis.
    • Improved Sensitivity: Direct coupling of the TDR function to the waveguide eliminates coax cables, enhancing bandwidth, resolution, and measurement sensitivity.
    • Fast Performance: Ultra-fast rise time (150ps), rapid response (<0.25 sec), and low power consumption (0.09 J per reading) make it ideal for both field and laboratory use.
    • Robust and Reliable: VWC readings are unaffected by bulk electrical conductivity (under 1.8 dS/m) and soil compaction, eliminating the need for soil-specific calibration.
    • Durable and Energy-Efficient: Low sleep current (<10 µA) supports long battery life.

    Key Features:

    • Waveform Digitizing TDR with 5ps Resolution
    • Measures Water Content: 0% to 100% VWC
    • Reads Bulk EC: 0 to 2000 µS/cm
    • Accurate Soil Temperature: ±0.25°C
    • Supports Time Domain Waveform Download
    • Ultra-Fast Incident Wave Rise Time: 150ps
    • Fast Measurement Response: <0.25 sec
    • Low Power Usage: 0.09 J per Reading
    • SDI-12 Interface

    Measurement Functions:

    • Volumetric Water Content (VWC): 0% to 100%
    • Medium Permittivity: 1 to 80
    • Medium Bulk Electrical Conductivity (EC): 0 to 2000 µS/cm
    • Medium Temperature: -40°C to +60°C
    • Pore Water EC (Hilhorst Model): 0 to 55,000 µS/cm

    Applications:

    • Agriculture, Turf, Landscaping, Orchards, Greenhouses, Golf Courses, and Nurseries
    • In-Situ Soil Water Monitoring for Agriculture
    • High Credibility Data for CloudBased Analysis
    • Gold Standard VWC Reference
    • Replacement for Neutron Probes
    • Portable Measurements
    • Laboratory and Field Research Instrumentation

    The EarthScout TDR Soil Moisture Sensor is the gold standard for reliable, high-accuracy soil moisture measurement, offering fast, energy-efficient readings for a wide range of agricultural and scientific applications.

    Specifications

    Weight & Dimensions:

    • Weight: 4 lbs.
    • Dimensions: 5.625”H x 5.625”W x 3.625”D.

    Electronics Case:

    • Type 4X polycarbonate water & corrosion resistant (non-submersible), UV rated case
    • Rechargeable, sealed, lead-acid battery for extended use
    • Stainless steel hardware & brackets
    • All fittings and hardware are water and corrosion resistant

    Battery:

    • Absorbent Glass Mat (AGM) technology for superior performance
    • Valve regulated, spill proof construction allows safe operation in any position
    • Power/volume ratio yielding unrivaled energy density
    • Rugged impact resistant ABS case and cover (UL94-HB)
    • Approved for transport by air. D.O.T., I.A.T.A., F.A.A. and C.A.B. certified
    • U.L. recognized under file number MH 20845
    • Nominal Voltage: 4 volts (2 cells)
    • Battery Dimensions: 1.89″L x 2.09″W x 3.70″ H
    • Weight: 1.30lbs.

    TDR Soil Moisture Sensor:

    • Sensor Dimensions: 8″L x 2″W x 0.5″D.
    • Monitors soil moisture, soil temperature, and soil electroconductivity (EC)
    • Durable, research grade sensors for use in harsh environments
    • Cables are waterproof sealed for outdoor use
    • Ground level sensors protected with abrasion and rodent resistant braiding

    Mounting Stake:

    • Plastic mount with steel rod
    Installation

    A-Series Installation Manual:
    Learn how to install and uninstall EarthScout in a greenhouse: A-Series Installation Manual.PDF

    Battery Removal & Charging:
    Reference the following PDF for instructions on how to remove and charge your EarthScout battery:  Battery Removal & Charging.PDF

    More Questions?
    Visit earthscout.com/education-center for videos about how to install the EarthScout app, and more! Or, contact us at 1 (877) 443-7632.

    Warranty

    What Is Covered By This Warranty?
    EarthScout warrants the EarthScout-branded product and the EarthScout-branded accessories contained in the original packaging (“EarthScout Product”) against defects in materials and workmanship when used normally in accordance with EarthScout’s published guidelines, and a period of ONE (1) YEAR from the date of original retail purchase by the end-user purchaser (“Warranty Period”). EarthScout’s published guidelines include but are not limited to information contained in technical specifications, user manuals and service communications.

    What Is Not Covered By This Warranty?
    This Warranty does not apply to any non-EarthScout branded hardware products or any software, even if packaged or sold with EarthScout hardware. Manufacturers, suppliers, or publishers, other than EarthScout, may provide their own warranties to you – please contact them for further information. Software distributed by EarthScout with or without the EarthScout brand (including, but not limited to system software) is not covered by this Warranty. Please refer to the licensing agreement accompanying the software for details of your rights with respect to its use. EarthScout does not warrant that the operation of the EarthScout Product will be uninterrupted or error-free. EarthScout is not responsible for damage arising from failure to follow instructions relating to the EarthScout Product’s use.

    EarthScout Purchase Terms
    When you purchase EarthScout there is a 1 year warranty.

    Return Policy

    EarthScout A4 has a 10 day return policy. The 10 day return policy is void if the plastic shrink wrap around any of the sensors are torn, removed, or there are signs of product use. The customer will be charged a 15% restocking fee for any returned products, and responsible for return shipping costs.