Guardian Avionics Carbon Monoxide Detectors Model Aero-452

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Part# 13-07102
MFR Model# 452-101-011


AERO 452 is the first TSO certified carbon monoxide detector for use in general aviation. The 452 can be easily installed in appropriate 2 to 4 hours as log book entry or as a follow on installation from a sample on a STC on a Cessna 172 supplied for download.
Aero 452 is the first TSO certified Carbon Monoxide detector for use in General Aviation. This unit has passed all mandatory functional and quality checks as prescribed by the FAA and has been awarded TSO certification.

Aero 452 has also been approved by FAA for installation on certified aircraft. Shipping FAA approved paperwork along with the unit, which will authorize its installation on certified aircraft. Some FAA Fisdo have allowed it as a Log Book entry or we supply 337 STC installed on a Cessna 172.

This unit is FAA TSO approved for all part 23 certified aircraft weighing (12,500 lbs or less). There is a one model STC for the Cessna 172, so that the installation manual, the instructions for continued airworthiness and the flight manual can be FAA approved for any aircraft.

For other aircraft, it does need a major repair and alteration Form 337 using the 172 STC documentation as a reference.


The CO sensors in the detectors have a 5 to 7 year life under ideal conditions. Even if they are protected from all external contaminants, it is strongly recommend re-calibration of the units after 3 years. The CO sensor is extremely sensitive and certain substances in the ambient air may change its characteristics and affect reliability.

WARRANTY :The Aero 452 comes with a 1 year limited warranty. The warranty will be void if the unit has been opened or tampered with.

14 Volt
California Prop 65 Warning Symbol

WARNING: The product may contain and/or expose you to a chemical(s) or substance(s) which are known to the State of California to cause cancer and/or birth defects or other reproductive harm.


  • Input Power-14 / 28 V DC
  • Power Usage-Less than 1 Watt, 10 Watts with heater ON.
  • Temp Range - -20 deg C to 55 deg C
  • Inspection - Each Unit 100 % tested.
  • Humidity - 5 % to 95 % RH (non-condensating)
  • Circuit Breaker-2 Amp
  • Design-Meets TSO-C48A
  • Weight-3.5 Oz
  • Sensor-Tested to 25,000 Ft
  • Calibration-100 and 500 PPM
  • Ouput-Dual Relay Output for, Panel Warning light / Annunciator




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: Does this unit come with the wiring and circuit breaker for installation?

No, this will not come with the installation materials per the manufacturer.

Q: Regarding the CO Guardian Carbon Monoxide Detectors AERO-452: At the end of the 5-7 years does the unit need to be replaced, or is there a way to refresh it?

The CO Guardian can be re-calibrated by the manufacturer for a flat fee. Here is what their website states:

The CO sensors in our detectors have a 5 to 7 year life under ideal conditions. Even if they are protected from all external contaminants, we strongly recommend re-calibration of the units after 5 years. We will re-calibrate any of your Guardian Avionics models for a flat fee (Please contact Guardian Avionics for pricing information). This service includes the installation of a new CO sensor, re-calibration of the unit and a complete system check. In addition, you will receive a fresh 12 month warranty.

Q: Does it come with the mating connector?

Per the manufacturer, yes the connector is included.

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