Description
The CO Guardian 353D-101 panel mounted Carbon Monoxide (CO) detector is designed especially for the Dynon SkyView line of experimental and homebuilt aircraft displays. A compact and lightweight unit meant to use as little panel space as possible, the 353D-101 combines highly accurate CO detection for the cockpit and the ability to display on an external Dynon unit. This CO detection unit is perfect for builders and pilots looking for protection from the dangers of carbon monoxide in their experimental, homebuilt, or non-certified aircraft.
The 353D-101 is specifically designed to integrate with and report on the Dynon SkyView line of PFD and MFD displays for homebuilt aircraft. Both alerts and CO levels can be displayed.
The sensitive onboard CO sensor alarms when carbon monoxide levels measure greater than 50 parts-per-million (PPM). A loud 85db aural warning will sound and an amber warning LED will flash when CO measures 50 to 99 PPM over a 3-5 minute span. An aural warning and a red LED flashing warning will trigger when levels climb above 99 PPM immediately when detected.
The built-in pressure sensor indicates altitude warnings at 10,000 feet, 12,500 feet, and 14,000 feet as a reminder to the pilot that supplemental oxygen should be used. These warnings are displayed on an optional annunciator light.
The compact and lightweight CO Guardian 353D-101 will fit into a small 2.25 in by 1.5 in instrument position and weighs only 3.5 oz. Installation is very simple and takes only 2-4 hours on average. The 353D-101 accommodates a connection to an external annunciator light (sold separately) to add an additional level of safety when the unit is out of view.
How It Displays on Dynon SkyView

353D-101 CO Guardian Remote Mount CO detector display on Dynon HDX
*Note: These units come with solder cup dsub connector. We recommend purchasing a crimp-style dsub connector: SA-1012
All products come with a 60-day money back guarantee and a one (1) year limited warranty. The warranty will be void if the unit has been opened or tampered with. If you experience any problems with the unit, please call 520-889-1177 or email us at support@guardianavionics.com and we will gladly assist you and have the problem rectified.
WARRANTY COVERAGE
GUARDIAN AVIONICS/CO GUARDIAN LLC. WARRANTS TO THE ORIGINAL CONSUMER PURCHASER, THAT THIS DETECTOR WILL BE FREE OF DEFECTS IN MATERIAL AND WORKMANSHIP FOR A TO REPLACEMENT OF THE PRODUCT, REPAIR OF THE PRODUCT OR REPLACEMENT OF THE PRODUCT WITH REPAIRED PRODUCT AT THE DISCRETION OF THE MANUFACTURER. THIS WARRANTY IS VOID IF THE PRODUCT HAS BEEN DAMAGED BY ACCIDENT, UNREASONABLE USE, NEGLECT, TAMPERING OR OTHER CAUSES NOT ARISING FROM DEFECTS IN MATERIAL OR WORKMANSHIP. THIS WARRANTY EXTENDS TO THE ORIGINAL CONSUMER PURCHASER OF THE PRODUCT ONLY.
Warranty Disclaimers
Any implied warranties arising out of this sale, including but not limited to the implied warranties of description, merchantability and fitness for a particular purpose, are limited in duration to the above warranty period. In no event shall the Manufacturer be liable for loss of use of this product or for any indirect, special, incidental or consequential damages, or costs, or expenses incurred by the consumer or any other user of this product, whether due to a breach of contract, negligence, strict liability in tort or otherwise. The manufacturer shall have no liability for any personal injury, property damage or any special, incidental, contingent or consequential damage of any kind resulting from gas leakage, fire or explosion.
Some states do not allow limitations on how long an implied warranty lasts, so the above limitation may not apply to you. Some states do not allow the exclusion or limitation of consequential or incidental damages, so the above limitations or exclusions may not apply to you.
Please note that Guardian Avionics is not responsible for loss and/or damages resulting from installation or soldering errors.
Legal Remedies
This warranty gives you specific legal rights and you may also have other rights that vary from state to state.
Warranty Performance
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 85706, 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
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 East Valencia Rd, Suite 216, Tucson, AZ 85706
- 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.