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Part# 13-05755


Carbon Monoxide (CO) is a toxic, odorless, and tasteless gas produced by the incomplete combustion of gasoline, kerosene, natural gas, butane, propane, fuel oil, wood, coal, and other fossil fuels. Dangerous levels of CO can be produced by internal combustion engines or from any poorly vented or improperly adjusted fuel-burning appliance. Exposure to CO may cause sickness, headaches, or even death.

This Carbon Monoxide Detector can save a pilot’s life, especially when flying with the heater on, by warning of the presence of CO in the cockpit—the spot will turn gray/black when CO is in the air. The spot on the detector returns to normal color after it is exposed to fresh air.

You can use this CO-DETECTOR as your personal and portable CO detection device. With the adhesive back, stick it on the panel or dash for a semi-permanent installation, or wear it on an ID badge or on a lanyard. Unopened CO-Detectors have a shelf life of 3 years, indicated by the expiration date on the package. Once removed from the packaging, the CO-Detector will last for 12 months.

Uses include:
  • Airplanes
  • Cars
  • Fuel Trucks
  • Grass Cutting Equipment
  • Tugs
  • Campers
  • And More!

CAUTION: Detector will be damaged by the presence of halogens (iodine, chlorine, bromine), ammoniac and nitrous gases. Do not use near diesel engines. Harsh direct sunlight will tend to bleach out indicator spot and shorten useful life

CO Exposure Levels


I purchased one of these for my Toyota SUV that has over 400K miles on it. Weve been using these in our airplanes over the years. They used to be the primary CO detector, now we use them as a backup to the CO Detector on the Sentrys. The Toyota still runs good as ever and I like to have this in the cabin with our two year old daughter riding in there now. It gives me peace of mind.

March 16, 2021

This is a great device, especially in areas where its sometimes too cold for the electronic ones to work. I remember years ago they had similar ones in the school buses. They shipped it first class mail, so the shipping rate was reasonable. Thank you very much Aircraft Spruce and Specialty Co.

Kenneth D
February 24, 2021

good product

February 22, 2021

Great product in its own sealed packaging so it doesn’t accidentally come open during shipping.

Scott N
January 28, 2021

It’s a simple easy to use safety device, to alert you of a silent killer!

December 29, 2020

I have had these on my Cardinal. Im no longer flying, but put one on my Toyota.

Mike W
December 16, 2020

just what I wanted.

October 5, 2020

Product as shown and described, fast shipping and well packaged. Would buy again.

Joseph H
October 5, 2020


Kent I
September 24, 2020

I use this in addition to having a battery operated Foreflight Sentry CO detector. Just in case the battery dies I then have a simple backup. Make sure you integrate looking at this detector as part of your instrument scan!

Pascal F
July 16, 2020


Q: What is the threshold in PPM for this detector to turn to black?

100 PPM 15-45 minutes / 200 PPM 4-5 minutes / 300 PPM 2-4 minutes / 400 PPM 1-4 minutes

Q: What are the dimensions of the ASA Carbon Monoxide Tester Part# 13-05755?

Approx 2-1/8" square.

Q: Does this product detects Carbon Dioxide? CO2?

No just carbon monoxide.

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