More Choice than
anywhere, from the
UK's Largest Specialist Retailer
® =
Recommended
Sensor
- the type of sensor used in manufacture. For a detailed
explanation, see "Sensor Types" under
FAQ
Display Method
- from the 5x LED's of
the CA1000 that light up to indicate a range (eg. >0.02% <0.05%) to the
multi-line, full menu display of the 6510.
Units
- how the reading is displayed (like a scale displaying Kilos vs Pounds vs
Stones etc). For a list of the UK limits in each category, see the
FAQ
Steps to UK Drink Drive -
starting at a reading of zero, how many increments the unit displays before
indicating the UK drink drive limit. For example, the UK limit in BAC% is 0.08%
- so on a 3 digit LED display (eg. CA2000), there will be 8 "steps" between zero
(0.00) and the limit (0.08). The AL5000 & AL6000 Pro models on the other
hand display mg/L, where the UK limit is 0.40mg/L, so there would be 40 "steps"
from zero (0.00) to the limit (0.40). For more info see our
FAQ
Approval Level - in the UK, only Fuel
Cell devices are type approved - in the US these are known as EBT's (Evidential
Breath Testers). There is also a lower classification in the US (ASD) which
certifies that a device is able to DETECT alcohol, but does NOT certify the
detectors ability to accurately display a specific reading. These are good
devices for home and personal use, but should not be considered accurate enough
for professional or company use - see
Employee
Testing and
FAQ.
Sampling Method - from a simple static
sensor which the user blows towards, to the physical relief valve on a
professional device that measures an exact volume of air before diverting excess
air out of the unit. The consistency of the sample is key to an accurate reading
- see "Sampling Methods" under
FAQ
Sample Time - to SOME extent, the longer the sample time, the
more accurate the sample, although tests with our professional Dräeger devices
has shown that most people will achieve a full breath sample in around 3-4
seconds. Most of the Premiere models incorporate a pressure sensor of some
description to ensure a MINIMUM blow pressure, and the new J4x varies the blow
time dependant upon pressure but only the use of a relief
valve can ensure an exact volumetric comparison for evidential use.
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