AlcoDigital AL7000 Pro Breathalyzer with replaceable Sensor - FASTcar Best Breathalyzer under £100

Bought this for the odd occasion when I drink in the evening then drive the next morning. I don't suffer from post session grogginess or hangovers so purely from a social responsibility perspective I wanted to be sure I was fit to drive i.e. well under the legal limit before starting the engine.I couldn't really justify £300 for a fuel cell sensor models used by the police, but a good semiconductor oxide model has an accuracy of +-10%. I considered the Alcosense Elite, but the construction of this product seemed far better and from reports the accuracy is in the same ball park as other quality semiconductor oxide sensor units and it's used by the Army. From what I can tell it is accurate, recommended.

As a professional driver i never take a risk with my licence. However i am becoming increasingly sceptical that alcohol stays in your system longer than what most people think. I bought this just to make absolutely certain that i have no alcohol in my system before i start my duty. I have heard of people being stopped whilst over the limit at 1400 in the afternoon after drinking the previous night. This breathaliser is very very easy to use and comes in its own protective box.You do not have to send it back to have it calibrated but replace the sensor in it yourself. Much easier and it wont get lost in the post. Talking of post i am absolutely astounded that Amazon delivered this 18 hours after ordering it at xmas from the other end of the country. Well done your customer service is second to none.

After searching for an accurate/reliable breathalyser at a reasonable price I bought the AL7000. Understanding that I would not drive until I had reached "zero" level I wanted a unit that provided confidence that the recorded levels were accurate and hence would reduce (if not 0 at first blow) over time to allow monitoring. I have used the unit over several weeks and have found that in situations when I know I would most likely be over the driving limit (but having slept for a number of hours) the unit is providing a wider range of measurements even when taken one after the other (allowing for the unit to warm up again). I believe I am blowing consistently into the unit but cannot produce consistent readings (I would expect very minor variations). The readings do appear to be "pot luck" which puts doubt in my mind that a zero reading after a "night out" is accurate. Potentially making several blows and taking the average may be Ok - but surely this is no basis to say that the unit is accurate or even fit for purpose?

Confusion as to what this device actually measures:According to the manufacturer's instructions,"The AlcoScan Model AL7000 analyzes a breath sample to detect alcohol in the lungs. This reading is then converted to blood alcohol concentration (BAC)."According to the instructions supplied by the seller (breathalyserdirect), the reading given by the device is milligrams per litre of breath.Breath alcohol concentration (BrAC) is not the same as blood alcohol concentration (BAC). The UK driving limit is 35 micrograms (µg) of alcohol per 100 millilitres (ml) of breath. The UK driving limit is also 80 milligrams (mg) of alcohol per 100 ml of blood.In terms of milligrams per litre (mg/L), the UK driving alcohol limit is 0.35 mg/L of breath or 800 mg/L of blood.From the readings I've got from the unit, it does indeed measure breath alcohol concentration, (it reads e.g. 0.17 mg/L), in which case the manufacturer's instructions are wrong!Confidence in "zero" reading, driving in Europe:According to the seller's instructions, "If you have only consumed a small amount of alcohol (less than 0.10 mg/l), or it is some time since your last alcoholic drink, it is likely that the unit will register 0.00".In Sweden, the driving limit is 0.2 mg/L BAC which equates to 0.088 mg/L BrAC assuming a blood to breath ratio of 2,300:1 which is the ratio used for the UK limit.This breathalyzer is apparently not sensitive enough to tell you if you are over the limit in Nordic countries with a 0.2 mg/L BAC limit or indeed in countries that have a zero limit (e.g. Czech Republic). When it reads zero, is it actually zero or just below its reliability threshold of 0.1 mg/L BrAC? Getting it wrong could have nasty consequences!12 V in-car adapter:The same unit is available elsewhere on Amazon at a slightly lower price including a 12 V DC in-car power adapterSellers' instructions say sensor should be replaced after six months:Really? Six months isn't long...

Wanted to be sure with the new lower Scottish drink law that I never had any alcohol in my system the morning after so purchased this Breathalyser. After trying it over the new year period on my self and family I was just so disappointed in the random results most of which were 0000 only a couple of times did it read anything like I would have expected but then on a second test 20/30 minutes later would read 0000 no matter how many times you try it .New Years ev we were out drinking till 2am my wife tried it at 9am and it read 0000 3 times even though see felt horrible and looked greener than normal ( she'll never read this) I would not trust this item. Two stars as the casing is well made and looks the part, honest officer!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!