Intelligent Cloud-Based Control Solutions

We Make Growing Easier

Backed by over fifteen years of service to growers around the world, Link4 Cloud-Based Environmental Controls are trusted by new and professional growers alike.

Indoors and Out

No matter where you grow, we’ve got an environmental control for you. Check out our latest controls today.

Do It Right the First Time

The most common mistakes can be avoided by involving a Link4 Controls Engineer early in the greenhouse design process.  Our FREE consultation makes the difference.
What Sets Us Apart From the Competition:

We Make Growing Easier

Web-Based Control

Access your system’s equipment and data from anywhere in the world at a moment’s notice.  Receive important messages, alerts, and alarms, as well as make changes via the Web on any mobile or desktop device.  We make your growing experience easier by making your equipment and data easier to access and use. LEARN MORE

Environmental Control Solutions

Whether you have a small commercial greenhouse or grow room or a large commercial thousand-acre greenhouse facility, Link4 has an environmental control solution for you.  We’ll make your growing experience easier by helping you get the right equipment and controls for your project. LEARN MORE

Outstanding Customer Support

Talk with real people with knowledge and interest in your specific grow operations. From electrical installation to cloud access and more, we are committed to making your growing experience easier. Our support doesn’t end after the sale.  CONTACT US

Electrical Installation Services

Link4’s installation teams know the greenhouse environment and have over 30 years of experience installing equipment and controls in greenhouses and grow rooms.  We make your growing experience easier by installing it right the first time. LEARN MORE

New Products

Link4 HE Anderson Integration

HE Anderson Integration

Our new automated fertigation solution combines H.E. Anderson Injectors and the Link4 iGrow 1800 controller.
1800 Cloud

Link4 Cloud 2.0

The latest innovation from Link4 is the Cloud 2.0 mobile application for web, Android, and iOS, giving you ultimate control over your crops.
Link4 iCloud 1.5

i-Series Cloud

i-Series Cloud brings the newest technology to cloud access and reporting.
Link4 RO Systems

Reverse Osmosis Systems

Link4 Corporation is partnering with AXEON to bring its customers the best reverse osmosis (RO) solutions for their growing projects.
Link4 Sapphire

Sapphire Commercial Irrigation / Mist Controller

The Sapphire is a commercial irrigation controller that is ideal for applications requiring misting, flood, drip or standard irrigation.

Our Product Categories

Link4 Pearl G-Series Controller

Greenhouse Controls

  • Advanced controllers at a variety of price points
  • Feel safe with control over your greenhouse operations
  • Remote access, networking & internet connectivity features
  • Increased profit with data tracking software
  • Reduce costs and save energy
Link4 Pearl G-Series

Indoor Controls

  • Link4 Cloud compatible for remote accessibility and advanced functionality.
  • Everything you need for optimal zone control
  • Use your smartphone to monitor and change settings
  • Get peace of mind with alerts for temperature, humidity, CO2, and more…
Link4 iDoser TS

Irrigation and Fertigation Controls

  • Built-in safety monitoring for crop protection
  • Select and customize your own alarms and triggers
  • Full control over dosing and nutrient system
  • Integrated irrigation scheduling and nutrient dosing
  • Improve costs, save time, and completely control your nutrient solutions
iPonic Cloud

Cloud Access & LinkConn

  • Smart layout saves time and makes optimization of growing conditions easy
  • Simple reviews of historical data
  • Increase growing efficiency
  • Successful in a variety of different zones
Link4 Digital Integrated Sensor Module


Link4 offers a variety of sensors to meet your specific project needs.

  • Advanced Digital Integrated Sensor Module
  • Digital Temp and Humidity Sensor
  • Digital Integrated Sensor Module
  • Weather Station
  • Anemometer
  • Solar Light Sensor
  • Temperature Probes
  • EC/Temp Sensor
  • pH Sensor (Flat Tip)
  • Room Pressure Sensor
  • Quantum (Par) Light Sensor
Link4 Gen-13 Panel

Lighting Panels

  • Custom grow light controls panels for HPS and LED
  • Cost-effective
  • 100+ light jobs for any size panel
  • Easy user interface using your Link4 iGrow Controller
  • Customizable to ensure your lighting control needs are met
Link4 iDrive 300

iDrive Motor Controllers

  • A simple and elegant solution for controlling your vents, curtains, and more
  • Compact design to save space in your greenhouse
  • Easy to install and wire
  • Works with any common greenhouse controller
  • UL and cUL approved
Link4 RO Systems

Reverse Osmosis Systems (RO)

Link4 Corporation is partnering with AXEON, a world leader with 30 years of experience in engineering and manufacturing innovative membrane and filtration systems, to bring its customers the best reverse osmosis (RO) solutions for their growing projects. The AXEON X- Series of Membrane Systems utilizes reverse osmosis technology to produce high purity water by reducing contaminants such as dissolved minerals, particulates, and organic impurities.

What We Do: The Link4 Story of Quality and Commitment