| Display: | 3 digits (0.00 ‰) |
| Size: | W x l x h: 65/125/35 mm |
| Weight: | Approx. 160 grammes incl. batteries |
| Batteries: | 4 batteries AAA - 1,5 volt alkaline |
| Measuring principle: | Semiconductor Sensor |
| Accuracy: | Maximum measuring error below 0,08 ‰ at 1.00 ‰ |
| Measuring range: | 0.00 to 5 ‰ (0.00 to 2,50 mg/l) |
The device should be re-calibrated every six months.
The accuracy of the testing pipes used for years now amounts to only about 20-25% (also due to reading difficulties).
The Measuring principle
There is a strong connection between blood and breath alcohol. Deep inside the lungs, in the alveolic space, blood and breath are separated by a thin, gas-permeable membrane. It is here that the exchange of gas takes place
Oxygen is absorbed by the blood, carbon dioxide and, where present, alcohol are released into the exhaled air.
To obtain this kind of air from the depth of the lungs (air from the alveolic space) for analysis a certain minimum amount of breath has to be exhaled.
(1.2 litres of breath = 4 seconds of strong blowing)
The correct testing results can be achieved only if you blow hard and the sufficient amount of breath is exhaled.