What Customers are Saying

“The Link4 support staff has made the installation and programming a painless process for us. I am pleased with the almost seamless transition from our old equipment to the new system.”

Louisiana Tech University

“We recommend Link4 controllers to all our professional growers.”

Grower's House

“Link4 provides exceptional control for our research and educational facilities.”

State University of New York

Integrated Contactor Panels

To reduce installation costs and facilitate easier installations, Link4 has introduced a line of Integrated Contactor Panels for our full line of environmental controllers. To eliminate the need of mounting two separate boxes with conduits in-between, UL and cUL approved contactor panels include pre-mounted Link4 environmental controllers.

Custom Contactor Panel

Link4 Greenhouse Controls has created the perfect customizable solutions for managing a grow room’s electrical system with their Custom Contactor Panels. There are several standard configurations to choose from or we will custom-build your panel to specifically meet the needs of your crop. Every panel is UL508a rated and includes NEMA4 enclosures. Unlike other “custom” panels, Link4’s Custom Contactor Panels have a multitude of optional components, including integrated load center, cooling fans, integrated greenhouse controllers, integrated motor controls, and hands off auto (HOA) switches. These panels also include thermal overload protection when required. Link4’s truly customizable contactor panels are the most comprehensive contactor panel available to horticulturists.

Custom Load Center

In order to ensure your equipment remains in its best and safest working conditions, Link4’s custom load centers are designed and manufactured to provide effective, reliable power/main breaking and circuit protection.

  • Reliable overcurrent and surge protection
  • NEMA compliant
  • NEC compliant
  • Commercial Applications


To ensure that our panel retains the coveted UL approval and to keep installation costs to a minimum, the iGrow integrated relay contractor panel comes pre-mounted with an iGrow 1000 series or iPonic series environmental controller.


The best part about pre-mounting the iGrow 1000 series environmental controllers in-house is that we can make the wiring connections for you as well. With a pre-wired system, the integrated panel really works right out of the box.

Why being UL Listed is important for your safety

In the United States and Canada, this product is Listed by UL. Representative samples of this product have been evaluated by UL and meet applicable safety standards.

Don't see what you're looking for? We do custom controls.

We do custom controls for large industrial projects. Contact us and let's talk about your next project.
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