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Part# 10-05171
MFR Model# ECT204


Aerospace Logic AOG Expedite Available, additional charges will apply.

Four Cylinder EGT and CHT Combination Kit with Probes

The ECT204 is a full color EGT and CHT combination instrument that provides simultaneous, real-time display of all four cylinders. This kit includes four Type-K ungrounded, EGT thermocouple probes of your choice, four Type-J ungrounded, CHT thermocouple probes of your choice and , all connectors and installation hardware.

Both Cylinder head and Exhaust gas temperature functionality is TSO'd and meets the temperature accuracy requirements of SAE AS8005 for a Class IIa (+/- 1%) instrument. Functional displays include:

Real-time four cylinder temperature display:
Menu select option for fast selection of display type
Automated rich-of-peak (ROP) leaning function for EGT
Automated lean-of-peak (LOP) leaning function for EGT
Automated shock cooling monitoring for CHT
Single cylinder temperature monitoring while retaining graphic indications for all cylinders (Both CHT and EGT simultaneously)
Graphic trend analysis and viewing of all cylinders simultaneously (selectable for EGT or CHT)
The ECT204 kits are TSO'd and STC'd as a primary replacement instruments under all flight conditions (day/night VFR and IFR).


    Certification / Compliance:
    TSO C43cCanadian STCFAA STCCertified as primary replacement
    DC Power Source
    Input voltage 6 to 36 VDCPower consumption 100mALoad dump tolerance +60VDirect spike tolerance +/- 60VCable spike tolerance > +/- 1KV
    Operating Temperature
    Constant operating -15ºC to +55ºCShort term operating (1hr) -40ºC to +70ºCStorage -55ºC to +85ºC
    Signal Input
    CHT - 0.0V to 20.255mV, ungrounded Type-J thermocoupleEGT - 0.0V to 44.866mV, ungrounded Type-K thermocouple
    Display Temperature Range
    CHT - 100ºF to 700ºF EGT - 200ºF to 2000ºF
    Temperature SAE AS8005 Class IIa +/- 1% FS
    Display Units
    ºF or ºC, user selectable
    Sunlight readable LCD176 X 192 display pixels65,535 colors
    Annunciator Output
    100mA sink with reverse EMF protection
    RS-232 Data
    Output 1 second per full sequence at 57.6K bps (8/N/2/N)
    Interface Connector
    Software Functionality
    Primary: All cylinders with Min and Max temperaturesMenu: Function selectionROP Leaning: Lean engine rich-of-peak (EGT)LOP Leaning: Lean engine lean-of-peak (EGT)Shock Cooling: User selectable rate (CHT)Single Cylinder: Display all cylinders, but monitor one (Both CHT and EGT simultaneously)Trend Graph: Graphic display of temperatures (CHT or EGT)


  • Dimensions: 2.45” X 2.45” X 0.9”
  • Weight (excluding harness and probes): 4.05 oz
  • Finish: Black anodized 6061 aluminum



Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: Can this instrument be configered for centigrade temp display. Also are the norm, warning and alarm temps programmable.

Yes, this instrument can display temperature in centigrade, and all limits are programmable.

Q: I have the AEROSPACE LOGIC 6 cyl CHT instrument on a jabiru 3300. I want to replace some of the probes due to damage at the spark plug ring. Please advise if universal probes will do or do you recommend other provider? thanks

Yes, universal probes will work as long as you use Type J wire for CHT and Type K for EGT.

Q: Can I use the Aerospace Logic four cylinder in the rotax 912 engine?

Yes, this will work on the Rotax 912.

Q: Is there a alarm trigger outlet for a voice announciator?

Per the installation manual, yes, this unit does have an annunciator output.

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