Intuitive Human Interface Solutions


Grayhill's Hall Effect Joystick Joysticks and Rotary Switches were featured in Lift & Hoist International Magazine. These joysticks offer precise cursor...
Grayhill's 3D Displays were featured in the Autonomous Vehicle Technology magazine. The displays are built for the rugged conditions and harsh environments...
Grayhill's Touch Encoder was featured in the Highways Today magazine. This device combines touchscreens, pushbuttons, trackballs, and rotary switches in...
Series 77
Grayhill's 77 Series Rotary Switch was featured in Wireless Design and Development magazine. The 77 series switch is the smallest rotary switch in Grayhill's...
Grayhill's 20 Series Concentric Mechanical Encoder Switch was featured in Medical Design Technology. This rugged seal switch performs flawlessly in harsh...

Human Interface for Off-Highway Vehicles

Company Mission
To be instrumental to our customers’ success by delivering intuitive human interface solutions that help farmers feed the world and construction workers build a better world.

Market Focus
Grayhill understands the human interface requirements of farmers and construction workers. Because operators of off-highway vehicles spend long days in the driver’s seat, engineers at Grayhill look beyond basic functionality to improve operator efficiency and comfort.

Our products and solutions have been deployed on tractors, harvesters and sprayers in the agriculture industry. In construction, Grayhill provides the human interface on bulldozers, loaders, excavators, graders and paving equipment. In related fields, Grayhill's experience extends to material handling, skid steers, aerial platforms and cranes.

We specialize in creating user interface devices that communicate via CAN-bus (J1939 and CANopen protocol) to control on-board systems. A standard range of keypads, joystick/encoders and displays are offered as base products ready for quick, cost-effective customization. These products simplify mechanical installation into the vehicle cab and electrical integration with the vehicle’s control units.

Products and Solutions
Series 3K Can-bus Keypads come in five standard sizes that can be used in new designs or to replace rows of rocker switches. The Series 3J Vehicle Display Controller is an arm-rest mounted rotary encoder with integrated joystick and pushbuttons for intuitive control of on-screen software. Series 3D Vehicle Displays with embedded computers are capable of running many applications simultaneously, such as video systems or virtual gauges.


Starting with custom design services, Grayhill takes a proactive approach to help identify job specs. Our engineers look beyond basic functionality to improve operator efficiency and ergonomics. This approach yields more intuitive controls that reduce operator fatigue and increase productivity. They optimize product design to simplify installation into the vehicle cab which reduces the OEM’s assembly time. Further, these custom products are programmed for easy integration with the vehicle’s on-board control unit. 

Off-Highway Vehicle Custom Solution
Harvester Armrest mounted controls
Tractor A-Post mounted controls
Excavator Display interface
Snow Groomer Keypad
Loaders & Excavators Keypads
Garbage Truck Keypad
Control System  Display interface


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