(Inc. 20% VAT)
(£3,298.56 Exc. VAT)
Electronics International

FAA-Approved Monitor

  • FAA-Approved
  • Primary Replacement STC’d, TSO’d & PMA’d
  • Remove your old engine instruments, including RPM, Manifold, EGT/CHT, Fuel Level, Oil Pressure and more!
  • Upgrade your aircraft panel with the best engine analyzer available.

Easy To Install Instrument

  • CGR-30P fits into your existing 3 1/8″ hole (remove your old tach).
  • Engine Data Converter (EDC) accepts all inputs. Only 2 wires run to the back of the instrument.

Accurate, Dependable & Easy To Use

  • Electronics International consistently has been a leader in digital engine instrumentation since 1979.

Data Recording of Every Flight

  • All monitored functions are stored up to three times per second.
  • Up to 1,500 most recent flights stored, downloaded via a USB port.
Electronics International

CGR-30P Main Screen

CGR Main Screen Diagram

The CGR-30P Premium Engine Monitor’s Main Screen displays the Tachometer and Fuel Flow in large analog arcs at the top of the instrument, providing immediate and quick reference values. The digital display provides accuracy in monitoring engine functions. The CGR Main Screen also features a complete, primary replacement EGT/CHT Bar Graph Engine Analyzer. Each cylinder is monitored by the CGR. If any EGT or CHT temperature rises above or below-programmed limits, the CGR provides an immediate alert. The EGT/CHT Bar Graph Analyzer features both Lean-of-Peak and Rich-of-Peak Modes for easy engine leaning. The CGR-30P will let you know as each cylinder peaks, at what temperature each cylinder peaks, and how far below Peak Temperature each cylinder is operating. To the right of the EGT/CHT Bar Graph Analyzer, the CGR-30P displays Fuel Remaining, Volts, and OAT.


EGT/CHT Bar Graph


The CGR-30P Engine Monitor features a state-of-the-art, full-color bar graph to assist with ROP/LOP leaning. Additionally, the bar graph provides 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.

CGR EGT & CHT Bar Graph
CGR Standard Bar Graph

Standard Bar Graph

CGR Normalized Screen

Normalized Mode

CGR With Abnormal EGT

Normalized Mode

(showing abnormal EGT #5)


The CGR-30P Premium Engine Monitor’s Bar Graph can be easily “Normalized” to create a baseline from which to monitor in-flight engine temperature changes. When Normalized, all EGT or CHT bars will be displayed as equal in height. If any cylinder’s EGT or CHT changes in relation to the other cylinders, that cylinder’s bar height will no longer be shown at the same height as the others. Such information can be an essential indicator of engine problems.

CGR-30P Premium Engine Monitor Digital EGT View

Digital EGT View


It’s easy to switch from the Bar Graph Display to the Digital View of your engine, which shows either all of your engine’s Cylinder Head Temperatures or all of its Exhaust Gas Temperatures.

CGR-30P Premium Engine Monitor Digital CHT View

Digital CHT View


Easy To Use Leaning Mode

CGR-30P Premium Engine Monitor Lean-of-Peak Mode

Monitor: Lean-of-Peak Mode

For Lean-of-Peak Operations, the CGR-30P Premium Engine Monitor informs the pilot as each cylinder peaks, at what temp each cylinder peaks, and how far from peak temp each cylinder 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.

Fuel Flow is displayed during the entire leaning process to assist in finding the optimal fuel-to-air mixture.

Detonation Margin Graph
CGR-30P Premium Engine Monitor Rich-of-Peak Mode

Monitor: Rich-of-Peak Mode

The number of degrees below Peak EGT is displayed on the first cylinder to Peak. Fuel Flow is displayed during the entire leaning process to assist in finding the optimal fuel-to-air mixture.


Secondary Screen

CGR-30P Premium Engine Monitor Secondary Screen

The Secondary Screen, on the CGR-30P Premium Engine Monitor, is intended to display functions which do not need to be displayed continuously. This Screen will display a red (warning) and/or yellow (caution) numerical value for a Primary Function of your choice. This function will also annunciate between the arcs on whichever Screen you’re viewing if a limit is violated. The red and/or yellow range annunciators directly under the arcs on the Secondary Screen will blink to alert the pilot of any potential problem with a primary function on the Main Screen.


Fuel Management & GPS Interface

CGR-30P Basic Engine Monitor Fuel Screen Estimated Used

Fuel Screen
Estimated Used

CGR-30P Fuel Screen Estimated Time

Fuel Screen
Estimated Time

CGR-30P Fuel Screen Estimated At Destination

Fuel Screen
Estimated at Destination

CGR-30P Monitor Fuel Screen Fuel Flow

Fuel Screen
Fuel Flow


CGR-30P Premium Engine Monitor’s Fuel Management

  • Displays ‘Estimated Fuel Remaining Based on Fuel Flow’.
  • Displays ‘Fuel Used for Flight’ and ‘Since Last Fill-Up’.
  • May enable you to extend your flight time using a number of fuel management tools.

GPS Interface

  • Ties into panel or yoke-mounted GPS.
  • Displays distance and time to empty.
  • Stores GPS data in its recorded flight log.

The Fuel Data Screens, on the CGR-30P Premium Engine Monitor, provide six sets of data based on Fuel Flow and GPS information. This data includes Range, Distance to Destination, Range After Reaching Destination, Fuel Remaining, Fuel to Destination, Fuel Reserve, Time to Empty, Time to Destination, Time Reserve, Fuel Used for the Flight, Fuel Used Since Fuel Was Added, Economy (MPGs) and Total Fuel Onboard. Much of this data depends on an RS232 connection to your GPS.


Data Recording

CGR-30P Engine Monitor Data Recording
  • Records all functions, every flight, up to 3 times per second.
  • See potential issues before they become major problems.
  • Quickly download data with a USB flash drive.
Engine Monitor Graphing and Analysis Flight Chart

This screen, on the CGR-30P Premium Engine Monitor, allows you to download Flight Data to a USB flash drive and set the Data Sample Rate. The Data Sample Rate is the time interval between recorded data. The CGR-30P can record up to 1500 flights before it records over the oldest flight first. The USB port may be found mounted in the instrument panel or hanging under it. Flight Data is recorded and downloaded in a comma delimited format. This allows the file to be ported directly into Excel.


CGR-30P Twin Package

CGR-30P Twin Package

Easily replace several of your aircraft’s primary and non-primary engine instruments with the Twin CGR-30P Package. The STC’d and TSO’d CGR-30Ps can replace and consolidate many of your existing primary and non-primary instruments. Each CGR will mount flush through a 3 and 1/8 inch hole and will not protrude from your panel.



CGR-30P Premium Engine Monitor

3.25” x 3.25” x 4.45” Deep, 3 1/8” Flush Mount

Monitor Weight
1.1 Pounds (Instrument Only)

CGR Power Requirements
7.5 to 30 Volts
Typical: 0.2 amps @ 12 Volts, 0.1 amps @ 24 Volts

Monitor Display
Active Matrix, Sunlight Readable

Fully Dimmable for Night Flights

USB Port
Data Download and Software Updates

Monitor Internal Storage
Up to 1,500 most recent flights stored. All monitored functions are stored up to three times per second. Recorded flight data can be easily downloaded via USB port.

CGR-30P Certifications
• FAA STC’d as Primary Replacement
FAA TSO’d to DO-160G
• FAA DO-178 Level C
• Transport Canada Civil Aviation (TCCA) Validated STC
• European Aviation Safety Agency (EASA) Validated STC

CGR-30P Basic Engine Monitor Specifications

Engine Data Converter (EDC-33P) Specifications


5.85” x 3.71” x 2.35” Deep

1 Pound

Power Requirements
7.5 to 30 Volts, Typical: 0.1 Amps

FAA TSO’d to DO-160G and DO-178 Level C

1 Volt Channel, 1 Amp Channel, 1 Fuel Flow Channel, 6 Pressure Channels, 17 Temp Channels, 4 Resistive Fuel Level Channels, 4 Capacitive Fuel Level Channels and 2 RPM Channels

EDC-33P Specifications


CGR-30P Videos