AERO 452-201-011 Remote Mount a Detector

• TSO Certified and designed for certified single and multi-engine piston engine aircraft.
• Dimensions: 3.35 in. L x 2.25 in. W x 1.50 in. H.
• Weight 4.0 oz.
• Input Power 14/28 VDC.
• RS-232 Serial Connection included for reporting on external systems (see list).
• Internal fan for optimum sensing.
• Shielded to prevent EMI (Electro-Magnetic Interference) with aircraft systems.
• Audible alarm with varying pitch at 85 dB.
• LED Red and Amber CO Alert lights. LED Green nominal indication light
• Temperature range 0 °F to 110 °F.
• Built-in Temperature compensating circuit.
• CO sensor tested up to 15,000 feet.

Approved PFD, MFD, and Engine Monitor Products that will display the Aero 452 data:

• Garmin: Garmin G3X, Garmin G3X Touch, Garmin GNS 480, Garmin G900 (Garmin G1000 reporting available with Aero 452-201-010 OEM unit only)
• J.P. Instruments (JPI):EDM 730, EDM 830, EDM 900 Primary, EDM 900 Experimental, EDM 930 Primary, EDM 930 Experimental, EDM 960 Twin
• Electronics Instruments (EI): MVP50P, MVP-50T, CGR-30P
• Advanced Flight System: AF2500/3500/4500/5000/5400/5500/5600/5800
• Grand Rapids Technologies (GRT): Sports SX, Horizon HX, and HXr EFIS Systems
• Ultra Electronics: AuRACLE CRM 2120
• MGL Avionics: XTreme EFIS

View all of our videos on our YouTube video channel.

• Information Sheet on CO Detector Products (PDF)
• AERO 452R User Manual (PDF)
• Guardian Avionics Aero 452R Installation Drawings (PDF)
• AERO 452R Panel Mount Airplane Flight Manual Supplement - AFM (PDF)
• AERO 452R Panel Mount Instruction of Continued Airworthiness -ICAW452 (PDF)
• AERO 452R Panel Mount STC452 cover sheet (PDF)
• AERO 452R TSO Approval - cover sheet for FAA certified aircraft
• 337 Approval Sample Letter 
• 452 FAA TSO Approval Letter

During the above warranty period, your product will be replaced with a comparable product if the defective product is returned, postage prepaid, to Guardian Avionics, Customer Service Department, 1840 E Valencia Rd, Suite 216, Tucson, AZ 85756, together with proof of purchase date. Please include a note describing the problem when you return the unit. The replacement product will be in warranty for the remainder of the original warranty period or for six months, whichever is longer. Other than the cost of postage, no charge will be made for replacement of the defective product.

Important: Do not attempt to open unit. If unit is opened, warranty will be void.

Your Carbon Monoxide Alarm is not a substitute for property, disability, life or other insurance of any kind. Appropriate insurance coverage is your responsibility. Consult your insurance agent.

Warranty Registration

Your unit is automatically registered for a 1-year limited warranty from date of purchase, provided you retain the proof of purchase (invoice). To ensure that you are informed of the latest updates and news on our products, please fill out the warranty card that comes with the product, and mail it to us at:

CO Guardian LLC dba Guardian Avionics.
1840 E Valencia Rd, Suite 216
Tucson, AZ 85706

Your unit has a Serial Number. Please check that the unit you receive has the same serial number as shown in your invoice.

For Warranty Service

In case you experience any problems with the unit, you may contact our customer service department at 520-889-1177 for assistance. Even if you have purchased the unit from one of our distributors, you can contact us directly at the following address for technical support or in case you have any problems with your unit:

Guardian Avionics
CO Guardian LLC.
1840 E Valencia Rd, Suite 216
Tucson, AZ 85706

Phone 520-889-1177
Fax 520-889-8249
Email support@guardianavionics.com

FAA TSO Letter of Approval

AERO 452 TSO Approval - cover sheet for FAA certified aircraft - visit Download page

AERO 454, AERO 455, AERO 551, AERO 553 TSO Approval letter - visit Download page

FAA Certification

When installed in accordance with this installation manual and the limitations, the installation of our TSO Approved models 452/454/455/551 and 553 is unlikely to have an appreciable effect on the weight, balance, structural strength, reliability, operational characteristics, or other characteristics affecting the airworthiness of the aircraft, and should therefore be eligible for installation as a minor alteration.

Please see the Instructions of continued Airworthiness for each model for limitations (available on downloads page). Most customers have been able to install these as Minor installation per AC 23.1309-IE and FAR 23.109. You must seek proper guidance prior to installation from you local FAA FISDO for clarification.

FAA Advisory Circular on CO

The above FAA circular provides information on the potential dangers of Carbon Monoxide contamination from faulty engine exhaust systems or cabin heaters of the exhaust gas heat exchange type. It also discusses means of detection and procedures to follow when contamination is suspected.

FAA Requirements for CO in Aircraft during Certification

FAR. 23.831 Ventilation in Aircraft

(a) Each passenger and crew compartment must be suitably ventilated. Carbon monoxide concentration
may not exceed one part in 20,000 parts of air (50 PPM).

All Panel mounted units are designed to alarm within 5 minutes if CO is between 50 PPM and 75 PPM to
meet the requirements of TSO C48.

AERO-152WD Warning Levels shown below. Note: (252,352's, 353's,452's and 552 all alarm with 5 minutes if CO is above 50PPM).

Caution - This product is intended to be used in aircraft enclosed cabins. Because of its super-sensitivity, it's not designed to be in compliance with UL2034, OSHA, and other industry standards.

National Transportation Safety Board Recommends CO Detectors to be installed in all General Aviation Aircraft.

FAA CERTIFICATION / STC

When installed in accordance with this installation manual and the limitations that follow, the installation of the model 452 is unlikely to have an appreciable effect on the weight, balance, structural strength, reliability, operational characteristics, or other characteristics affecting the airworthiness of the aircraft, and should therefore be eligible for installation as a minor alteration.

Model AERO 452 has TSO certification and is STC approved for installation on certified aircraft. Customers have three options depending on their relationship with their local FAA FISDO office (you must seek proper guidance prior to installation). 1) Install it as minor log book entry since the unit is TSO approved as non essential equipment. 2) Install it using FAA Form 337 as minor alternation. 3) Install it per supplied STC on a Cessna 172. Data shown in our Downloads section.

However, no approval exists for the other panel-mount models of CO Guardian (models AERO 252, 352's, 353's, 551 and 553). Acceptance for the installation and use of as a non-essential equipment (per AC 23-15, paragraph V, pg. 28), must be sought through your local FBO and the appropriate offices of the Federal Aviation Administration or other certifying agency.

452 Sample 337 FAA Form - please visit Downloads page
Sample 337 Model 552 - please visit Downloads page

View our installation examples.

Because of their sensitive nature, all carbon monoxide (CO) detector sensors require replacement after a period of time to remain accurate. All Guardian Avionics / CO Guardian aviation CO detectors feature a self-test at power on for each flight. If the unit shows a failure of the CO sensor upon power up, you must send the unit to Guardian Avionics for replacement or overhaul. Depending on level of use, storage environment, and flight environment, most CO sensors have a usable life of 5-7 years. Though our units have a required Time Before Overhaul (TBO) of Seven (7) years from point of installation regardless of self-test results, we recommend sending in your unit for replacement / recalibration every 5 years during your annual maintenance inspection to assure safety and accuracy of your unit.

The procedure for recalibration is as follows:

• Remove component and note full model number and unit serial number.
• Apply for an RMA Number at: https://www.guardianavionics.com/rma-request or call 520-889-1177 (M-F, 8am to 5pm MST) - the RMA number will be emailed back to you.
• Order a recalibration or new replacement at https://www.guardianavionics.com/recalibration.
• Send unit in under RMA number to: Guardian Avionics, Attn: RMA #___, 1840 E Valencia Rd, Suite 216, Tucson, AZ 85756
• Once unit is received by Guardian Avionics, the recalibrated or replaced
  unit will be shipped within 3-5 business days unless specified. Core charge will be refunded.
• Upon receipt of the recalibrated/replaced unit, a fresh 1 year limited warranty applies and the unit has a fresh 7 year TBO.