Grand Rapids Technologies, Inc.

Automated engine monitoring for all aircraft engines.

EFIS - Electronic Flight Information Systems for Experimental Aircraft

The Model 4000 pictured with a few of its sensors, and the new Horizon EFIS.

New! Add Color Graphical Engine Monitoring to
your Model 4000/6000/9000 EIS for $1995.

See Horizon EFIS below for more details.

Proven & Affordable Engine Monitoring.

• Analog gauges leave you unprotected with their low accuracy, hard to read scales, and short life. The EIS provides outstanding accuracy, a large, backlit, high-contrast LCD display readable under all lighting conditions, and a lifetime warranty for manufacturer defects. But that is not the best part...
• Alarms! The EIS is always watching your engine. The moment a limit is exceeded, the external warning light flashes to get your attention, and the display changes to a labeled screen to identify the problem. No longer are you a slave to your engine instruments.
• User programmable limits, and user-definable auxiliary inputs allow you to customize the EIS to meet your needs.
• Models for all types of engines.

This site is a backup to the main site. Please click here to go to our new web site.

Model 2002  EIS
Ideal for Two Stroke Engines

Model 2004   EIS
Ideal For Four Stroke Engines

Model 4000 & 6000
Complete Monitoring for 4 and 6 Cyl. Engines

Mounting Dimensions

Pricing & Shipping Information

Image Gallery

Recommended Configuration for Lycoming
and Continental Engines

                New...

Revised Pricing...new low-cost options!

The Horizon EFIS Series I - Affordable, High Integrity EFIS for Experimental Aircraft

• Sunlight Readable, wide temperature range, flat panel display.
• High Integrity Attitude/Heading Reference System - built to aerospace standards - not GPS dependent
• Primary Flight Display, Moving Map, and Graphical Engine Monitor
• Click below to read more!

EFIS  Horizon  --- Click Here!