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Replace your Tachometer with EI’s CGR-30P, and bring glass panel technology to your panel today, without breaking the bank.


  • STC’d & TSO’d
  • 3 ⅛ “
  • Flush Mount
  • Four Screens
  • Over Twenty Functions


CGR-30P Overview

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 beauty of the CGR-30P is that YOU get to choose many of the functions the CGR-30P replaces.  Designed as a Cluster Gauge Replacement (CGR), the CGR will replace your Tachometer, Manifold Pressure, Fuel Flow Totalizer, EGT/CHT Bar Graph Analyzer, and more!

The CGR is divided into three separate screens.  The three screens are the Main Screen, Secondary Screen, and the Fuel Management Screen.



Frequently Asked Questions

Does the CGR-30P show total AMPS load or AMPS charge/discharge?

Both the CGR-30P and CGR-30C measure AMPS by using an external shunt. Depending on where the shunt is located will determine what you are measuring, and it’s possible to measure more than one shunt. For example; if you put a shunt between the battery and bus you will measure current draw and charge current from the battery. If you put a shunt between the alternator and the bus you will see total alternator output. It is possible to do both on either instrument.

Will the CGR-30P track and store a running total Tach Time even if it is not selected to be one of the selected primary or non-primary functions?

Yes it does.

If I don’t hook the CGR-30P up to any fuel level sensors it will only get its fuel quantity information by me adding fuel and by burning fuel, right?


Are the AL-1R and AL-1Y mandatory? Can I supply my own Lights or interface to the existing or external annunciators?

Our STC says that the AL-1 lights should be installed if the CGR will be installed more than 8″ from the pilot’s visual centerline. If you are installing the CGR within that 8″ then the AL-1 lights would not be required. Using lights other than our supplied AL-1 lights would probably be a very minor alteration that your installer would have to approve.

Which probes are better? Magnetic float probes, or capacitive probes? What do they cost?

Capacitive Vs. Magnetic really comes down to the ease of installation. Both will output a stable, repeatable signal with no moving parts that can get corroded. The Capacitive Probe is a long pipe, so special accommodations need to be made to mount that in the tank. In an experimental plane that is being built, this is typically not an issue. In a certified plane it can become very time consuming and difficult to make the probe fit.

The Magnetic Probe is a float style probe. It was specifically designed to replace other float style (resistive) probes that were installed in planes from the 1930’s until today. They are custom manufactured to physically match the mounting and geometry of your previous resistive probe. This is a plug and play replacement when in use with our system.

The P-300C (Capacitive Probe) is $249.00 each The P-300M (Magnetic Probe) is $349.00 each

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