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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


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

Good tool to have in the cockpit.

Ravinder D
June 23, 2020

Great product

Michael N
April 9, 2020

As with all products I have purchased from Aircraft Spruce, they are great quality at a very good price. I will keep buying from them.

David R
February 29, 2020

Twice in my flying experience one of these has saved the day, both times due to an exhaust leak brought in through the cabin heater. Smelled nothing, felt no symptoms, just noticed the dot was turning black. I immediately shut off the heater, opened the cold air vents and landed ASAP. Both times the dot had resumed its normal color by the time I had landed.

December 19, 2019


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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