Aviation's Panel Mount Avionics Installation Leader

This is EI's basic discounted CGR package for a 4- or 6-cylinder engine, designed to compete with plasma display bar graph units. This is a pre-built and configured package with no add-ons or exchanges.

Replace your Tachometer with EI’s CGR-30P, and bring glass panel technology to your panel today, without breaking the bank. The CGR-30P is a TSO’d, STC’d Primary Replacement engine instrument. What can it replace? The answer: most of the aircraft’s primary engine functions.

The Main Screen

The Main Screen displays the Tachometer and Manifold Pressure in large, beautiful analog arcs at the top of the instrument. Directly below the analog arcs, the respective digital values of each function are displayed. The analog display provides pilots with immediacy and quick reference values, while the digital display gives pilots the precision to accurately monitor their engine.

For aircraft without a constant speed prop, pilots may choose to display fuel flow instead of Manifold Pressure on one of the two arcs at the top of the instrument, which will free up another location on the Main Screen for another function.

In addition to the two arcs at the top of the Main Screen, the CGR also provides pilots with a complete, Primary Replacement EGT/CHT Bar Graph Analyzer. Each cylinder is monitored by the CGR, and if any engine temperature rises above or below programmed limits, the CGR will let you know immediately. The EGT/CHT Bar Graph Analyzer also has a Lean-of-Peak Mode and a Rich-of-Peak Mode for easy engine leaning. The CGR will let you know as each cylinder peaks, at what temperature each cylinder peaks, and how far below each cylinder is operating once they have peaked.

To the Right of the EGT/CHT Bar Graph Analyzer, the CGR contains three STC’d, Primary Replacement engine instruments. Choose between myriad options, including Fuel Pressure, Oil Pressure, Oil Temperature, TIT, Volts, Fuel Level(s), Vacuum, and more.

Bar Graph

  • Overview: The CGR-30P comes standard with a state-of-the-art, full-color bar graph which assists with ROP/LOP leaning. Additionally, the bar graph has both “normalized” and digital readout screens. No other bar graph in the industry comes close to providing the number of options the CGR-30P offers.
  • ROP Mode: The Rich-of-Peak mode on the CGR-30P informs the pilot when the first cylinder peaks, as well as how many degrees below peak the engine is operating.
  • LOP Mode: For Lean-of-Peak Operations, the CGR-30P informs the pilot as each cylinder peaks, at what temp each peaks, and how far from peak each is. For quick reference, every cylinder’s peak information is constantly displayed and “tattletale bars” are shown above each cylinder, indicating where each cylinder peaked the last time the engine was leaned.
  • Normalized Mode: The Bar Graph can easily be “Normalized,” creating a baseline from which to monitor in- flight engine temperature changes. When Normalized, all of the bars start off at the same height. If any cylinder’s column is not the same height as the others, than that cylinder’s Exhaust Gas Temperature has changed in relation to the other cylinders. These changes can be critical indicators to problems occurring within your engine.
  • Peak Markers: While other monitors don’t maintain your engine’s leaning history, The CGR-30P’s Bar Graph keeps track of exactly where the cylinders peaked during each leaning process. When leaning, the CGR-30P displays a peak marker indicating where each cylinder peaked during the last leaning process, providing visual assistance to pilots.


In addition to the Main Screen, the CGR-30P offers a Secondary Screen, a Fuel Quantity Screen and a GPS Data Screen. These additional screens give the CGR-30P flexibility not found in other engine instruments. Simply push the “S” or “Screen” button found on the front of the display to cycle between the CGR-30P’s four different screens. At any time you can push the “E” or “Exit” button to quickly return to the main screen. Any time the main screen is not being displayed you will have annunciators at the top of the screen to warn you if a primary function goes into caution or warning.

The Secondary Screen

The Secondary Screen displays the same two Primary Arcs as on the Primary Screen, plus six more instruments. One of the six instruments will be a Primary Instrument and can have redlines, while the other five of the six will simply indicate the title and value of each parameter being monitored.

For the one Primary Instrument, you can choose any Primary function that requires a redline to be monitored. For instance, pilots can choose one of the following: Fuel Flow, Fuel Pressure, Oil Pressure, Oil Temperature, TIT, Volts, Fuel Level(s), Vacuum, and more.

The remaining five instruments on the Secondary Page cannot be functions with redlines. For instance, some of the allowable functions include: OAT, Fuel Flow, G-Meter, Amps, Carb Temp and more. Note that for some functions on the Secondary Screen, additional charges may apply.

The Fuel Management Screen

One of the most powerful features of the CGR is the Fuel Management Screen. The Fuel Management Screen is actually a collection of several sub-screens, all designed to help you keep tabs on how much fuel is onboard at any given time, and in which tank.

The CGR will display: Fuel Flow, Fuel Remaining for each tank, Time to Empty, Distance to Empty, Fuel, Time and Distance in Reserve, Fuel Used for the Trip, Fuel Used since Last Fill Up and more. Telling your CGR that you’ve added gas is a simple step that requires just a few clicks of a button.

In addition to the many fuel management features the CGR offers, the Fuel Management Screen also graphically represents the amount of fuel on board, for quick and easy reference.

The Fuel GPS Data Screen

The Fuel GPS Data Screen on the CGR-30P gives you a plethora of additional Fuel data and Fuel GPS information. This screen can display; when you need to switch tanks based off fuel flow, estimated fuel level, fuel remaining, estimated time to empty, estimated fuel used, and more!


  • RPM
  • Fuel Flow
  • EGT/ CHT Bar Graph
  • Fuel Remaining
  • Volts
  • OAT
  • Tach Time
  • Local Time
  • Zulu Time
  • Flight Timer
  • Fuel Used for the Flight
  • Fuel Used Since Fill-up
  • All GPS/Fuel Flow Data

  • Dimensions: 3.25” x 3.25” x 4.45” depth
  • Weight: 1.1 Lbs.
  • FAA Certifications: STC’d, PMA’d and TSO’d
  • Environmental:  Designed and Tested to TSO (DO-160G)
  • Software:  Designed and Documented to TSO (DO-178B, Level C)
  • Minimum Performance Standards:  TSO-C43c, TSO-C44c, TSO-C45b, TSO-C47a, TSO-C48a, TSO-49b and TSO-C55a.
  • Power Requirements:  7.5 to 30 Volts, 0.1 amps @ 24V (Typ), 0.2 amps @ 12 Volts (Typ).
  • USB Port:  For USB Memory Stick use only.
  • Display:  Active Matrix TFT, 262,144 colors, Sunlight readable
  • Backlight:  External control line, programmable levels.
  • Display of Primary Gauges with Red and/or Yellow Ranges: Five on the Main Screen + EGT and CHT.  One on the Secondary Screen. 
  • Display of Primary and Non-Primary Gauges without Red and/or Yellow Ranges:  Five on the Main Screen + EGT and CHT.  Six on the Secondary Screen.

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Prop 65 Warning: This product may contain chemicals known to the State of California to cause cancer, and birth defects or other reproductive harm.