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READ THE MANUAL
 
In our effort to enhance safety in aviation, we've introduced the CO-USB Carbon Monoxide Alarm, a simple device that provides a brilliant and reliable indication of CO poisoning. Per FAA guidelines, it flashes bright RED at 41 PPM. For reference, see Carbon Monoxide, a Deadly Menace (faa.gov).
 
It features a breakthrough electrochemical sensor that provides excellent anti-interference from other gases.
 
Power it up from any USB port, even your Android or late-model iPhone (15 or later).  It's priced like a toy but is very serious in its specifications. With a 3-year warranty and low power consumption, you can depend on its reliability.
 
It's part of our commitment to prioritize affordability, ease of use, simplicity, and reliability—all crucial features for enhancing safety in aviation.
 
It also includes a serial port for easy OEM integration that can be programmed to any alarm value and offers continuous output of CO value via an always broadcasting serial line.
 
If you're looking for the best panel installation, check out the CO-USB-UP, which reverses the orientation of the LED to face upward.
 
Due to high demand, new orders on our website will start shipping mid-October. Order now to have yours for fall and winter flying adventures. CO-USB  with alarm and battery begins shipping in October.

CO-USB Carbon Monoxide Detector Alarm (Original)

SKU: RI-2025-2-COUSB
$29.95Price
Quantity
Due to high demand, new orders on our website will start shipping mid-October. Order now to have yours for fall and winter flying adventures.
    • Plugs into any USB port for power / charging
    • Low power consumption (30 milliamperes)
    • 3 year warranty
    • Excellent anti-interference from other gases
    • Temperature compensation; works across -10 to 40C
    • 3 minute warmup to first accurate result
    • 30 second response to first indication
    • 90 second recovery after removal of CO gas
    • Red LED flashes at 41PPM 
    • Digital output via serial data (0 to 1000ppm results @ 9600 baud) (via 5 pin port) (CO-USB Original only)
    • Digital Alarm signal output; provides a logic “1” (5 volts) whenever the red LED is flashing (via 5 pin port) (CO-USB Original only)
    • 8 hour battery life (CO-USB-Battery only)
    • LEDs face up (CO-USB-UP only)
    • 85 db alarm (CO-USB-Battery only)
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To Our Customers

The instruments from Radiant Technology are not designed to be used in applications where their failure would endanger safe flight or human life in any way. They are intended solely for use in VFR conditions. They are not certified to meet any Technical Standard Order, and are not produced under a Parts Manufacturing Authority (TSO / PMA). As a result, they are suitable only for use in experimental and ultralight aircraft, and in Light Sport Aircraft, if meeting the requirements of the respective manufacture.

Support

If you need support for your Radiant instrument purchase, please contact us by email at support@radiantinstruments.com. Because of our small staff, we do not have a direct phone number.  We do our best to respond to emails as soon as possible. If you do not hear from us within 48 hours, please try again. You may also try kathy@radiantinstruments.com. Please check our our Warranty Information here.

Shipping Information

We are in the business of offering innovative aircraft instruments for experimental aircraft flying, and backup / CO instruments for general aviation (non-TSO/non-PMA). As a result we often introduce new products for sale that are in the final engineering phase. Sometimes an engineering problem emerges in the final phase that delays our production runs. This means that if you are ordering a new product, we could be several weeks out from shipping. We try to keep our product pages up to date with shipping information.

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As of 2025, there are only two of us working Radiant instruments. We manufacture products in batches, and cycles take about a month. It is always best to order now and get on the list. We do charge your card at the time your order is placed.

 

We are now able to offer 2nd day UPS shipping on domestic orders, as well as USPS Ground Advantage. In some cases, we may need to revise you shipping amount, and will notify you by email of that change.

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