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The iCO has been tested with a number of devices on the market, however there are new devices being introduced often and operating systems are also regularly updated so there could be some exceptions these devices do not work on. When using the iCO we recommend you use with the device’s VOLUME turned up full. If you device does not have a headphone jack these have been tested to work through the adapters that come with most devices too. If your device does not work and your volume is on full, please contact us for technical support.

Fully Compatible with:

  • Samsung (requires Android 5 or later)
  • Iphone (requires iOS 9 or later)
  • Ipad
  • Sony Xperian Z5
  • LG G2 & G4

The iCO™ Smokerlyzer® has free UK Delivery.

Yes we have full after sales and technical support.

iCO Smokerlyzers are personal breath CO monitors and testers which measure the small amounts of CO in exhaled breath. The more you smoke, the higher your CO reading will be. These readings can be used as a tool and education to assist someone to quit smoking, however this still requires ‘will power’ and the ‘want’ to quit!

CO is eliminated through the lungs and has a half-life of approximately 4 hours (5). Therefore you must not leave it too much longer than 20-30 minutes after having a cigarette to take a CO reading as it leaves the body relatively quickly. A smoker can blow non-smoker readings approximately 24 hours from going ‘cold turkey’ and quitting smoking completely.
5. Carbon Monoxide Toxicity in Emergency Medicine. Available at: http://emedicine.medscape.com/article/819987-overview#a0104

Smoking – as you would expect, smoking is the main reason for a high CO breath reading and for that reason the CO breath test is seen as the overall best way to validate smoking status and track progress during a quit attempt.

Cannabis/marijuana – regardless of the THC (delta-9-tetrahydrocannabinol) level the levels of carbon monoxide absorbed are three to five times greater than among tobacco smokers (6). This may be due to the marijuana users inhaling more deeply and holding the smoke in the lungs and because marijuana has a very high burning temperature compared to tobacco.

Hydrogen – all electrochemical sensors for CO have a certain amount of cross-sensitivity with hydrogen, this means that if there is hydrogen in the breath sample the sensor will see this as CO therefore increasing the reading. Hydrogen is produced in the gut normally in very low concentrations (5-25ppm), but if you have an intolerance to sugars such as lactose or fructose you will produce higher levels of hydrogen after eating one of these sugars. Bedfont have spent years working with our sensor partners to ensure the lowest possible cross-sensitivity to hydrogen and as a result the iCO has a cross-sensitivity of less than 10%. Therefore even for a very unusually high level of hydrogen on the breath such as 100ppm, the maximum level of ppm added to the reading would be 10ppm on the iCO.

Alcohol – electrochemical sensors are affected by alcohol in high concentrations therefore cleaning wipes or hand gels containing alcohol cannot be used to clean the monitors. Alcohol can permanently damage the CO sensor but usually the sensor will recover from being saturated by alcohol after 24-48 hours left in an alcohol free environment. A paper conducted by Daniela Galeone et al in 2006 concluded that CO readings can be affected by the level of alcohol on the breath after drinking but found this was on a very small level after consuming 6 drinks containing 40% alcohol (7). Therefore we have to conclude that alcohol on the breath has negligible bearing on the CO breath test.

Atmospheric CO – after all the above aspects have been considered, atmospheric CO should be investigated. Vast amounts of CO are released into the atmosphere by burning fossil fuels (forest fires, car exhaust emissions, and burning natural gas). People may be chronically exposed to CO as a result of smoking or from the atmosphere (8).

CO Poisoning

6. Marijuana Information. Available at: http://www.narconon.org/drug-information/marijuana-pot.html

7.D Galeone et all 2006. Can Carbon Monoxide be Fuelled by Alcohol Intake. Tobacco Control 2006 volume 15, pp143.

8. J Wright 2002. Chronic and occult carbon monoxide poisoning: we don’t know what we’re missing. Journal of Emergency Medicine 2002 volume 19 pp386-390

The answer to this question is subject of some debate, but from over 25 years of experience in breath CO monitoring Bedfont recommend waiting at least 10 minutes after a cigarette to take a breath CO reading. This is to avoid a higher CO reading than is accurate due to CO being left in the lung from the cigarette rather than CO that has been metabolized and secreted back into the lung.

In short… NO!

E-Cigarette’s (unless quite unique) do not cause combustion to happen, which generally happens when burning a substance, therefore the levels of CO produced are too low to affect an iCO Smokerlyzer. Therefore E-Cigarette users would blow the reading of an non-smoker on these devices.

Breath CO readings are displayed in ‘Parts Per Million’ (ppm), which is the number of CO molecules in a million parts of air. Therefore 1ppm of CO denotes 1 part CO for every 1,000,000 parts air, illustrating just how accurate and sensitive the Smokerlyzer® breath CO monitors are. The ppm reading can also tell you how much CO is in the blood (%COHb) using a conversion table.

%COHb is the percentage of red blood cells carrying CO instead of oxygen in the blood. When you inhale smoke from a cigarette, CO is absorbed into your blood through the lungs, Oxygen (O2) is carried around the body by red blood cells. CO binds with haemoglobin in the red blood cells to form carboxyhaemoglobin, otherwise known as ‘blood CO’ or %COHb preventing red blood cells from carrying oxygen. CO binds with haemoglobin 200 times more readily than oxygen and a very heavy smoker may have 10% of their blood cells taken up by CO, depriving the body of oxygen.

When testing breath CO a breath hold need to be performed in order for the CO level in your blood to equilibrate to the level of CO on your breath. This was clinically evaluated in 1984 by Robert West where he found that ‘CO increased systematically up to 25 seconds of breath holding, with the curve beginning to flatten off at 15 seconds’ (9). This was supported in 1986 when Anthony Biglan et al writes that the use of 15 second breath hold is acceptable for discriminating between smoker and non-smokers (10).

Therefore the manufacturers, Bedfont have adopted 15 seconds as our recommended breath hold time period as this appears to be both clinically correct as well as most acceptable for patients using the device.

9. R West 1984. The Effect of Breath-Holding on Expired Air Carbon Monoxide Concentration in Cigarette Smokers. Addictive Behaviors, Vol. 9, pp. 307-309.

10.A Biglan et al 1986. First Versus Second Portion of Expired Air and Duration of Breath Holding in the Sample of Expired Air Carbon Monoxide.

No, the device is not Bluetooth compatible and you will need a headphone jack or adapter to operate the iCO Smokerlyzer.

The iCO Smokerlyzer® CO monitors use electrochemical sensors which can be affected by some substances such as alcohol, bleach etc therefore only non-alcohol cleaning wipes should be used to clean the device. Using wipes that contain alcohol or bleaches could damage the sensor and/or cause false positive/negative readings.

A common issue is caused by using the iCO with the volume on your phone turned down too low.

When using the iCO we recommend you use with the device’s VOLUME turned up full. If you device does not have a headphone jack these have been tested to work through the adapters that come with most devices too. If your device does not work and your volume is on full, please contact us for technical support.