Why is my NObreath showing incorrect readings?
If your device is reading incorrectly or showing 0ppb then this could be the result of a few things. Firstly, check that the mouthpiece is connected properly and that you are not covering any vent holes during the test.
Alcohol contaminations will affect the Nitric Oxide electro chemical sensor inside the device. Ensure no VOC's and alcohol based products are used on the device and accessories related to the device, along with no room sprays or aerosols being sprayed in the presence of the device.
This could also happen if the pump is not running correctly, if so, you will need to charge your device fully.
If the problem persists or has not been resolved by the information provided above, please contact Bedfont or your local distributor for more advice.