Firstly, what is your breathalyser going to be used for? Is it purely for personal use while out and about? Or are you buying a breathalyzer for sale and use in the workplace? A workplace may buy breathalyzers for sale that are stronger, more expensive, and more reliable. Personal users may buy breathalysers that are smaller and more portable. Think about whether it needs to be compact and lightweight for carrying with you all the time. Maybe it can be a sturdier, larger model that can live in a desk drawer until needed.

Budget will probably be the next deciding factor when buying a breathalyzer for sale. The best bet is to buy the best one you can afford. Generally speaking, the more expensive models are more reliable, last longer, and are more accurate. This is mainly due to the technology and design built into them. Cheaper is usually not better, and in some cases, they are no more than toys.

It is also important to ensure that the device can be recalibrated (except for disposable versions). The recalibration should always be done by a trained professional, not with a take-home recalibration pack. This is essential for maintaining your device’s accuracy and lifespan. This should be an easy and affordable process for the purchaser as well.

Look for a breathalyzer for sale that has an accuracy rating of +/- 0.01%. If a company offers 100% accuracy, don’t buy it as that is impossible, the item is also likely to be a novelty item. Do not purchase breathalysers that are really cheap either. These are generally novelties as well and are best avoided as they will not be accurate.

Buy breathalyzers for sale that have an attached mouthpiece to blow into instead of a “passive” breathalyser that analyses your breath as you speak over it. The mouthpiece helps eliminate smoke, dust, and other impurities that may affect the reading accuracy. Mouthpieces can be removable or permanently attached depending on the model. Replaceable mouthpieces are great for hygienic sharing of your device at a workplace or party.

The next decision to make when you get a breathalyzer for sale will be between a semi-conductor model or a fuel cell model. Semi-conductors use a reaction between the ethyl alcohol breathed into the acetic acid and water within the device to determine a reading. The reaction creates an electrical current which is small or large depending on the amount of alcohol the person has consumed.

Semi-conductor models are often cheaper but are not as reliable or as accurate as a fuel cell model. If you buy a semi-conductor breathalyser, make sure it is a Silicon oxide-based model as they are more accurate. Semi-conductor models generally have a shorter lifespan and lose accuracy over time. Semi-conductor models can also give false-positive readings for people with diabetes. Their readings can be affected by the extra acetone found in their breath. Fuel cell breathalysers do not have this issue.

Fuel Cell models produce an electrical charge when exposed to alcohol that can be more accurately measured than the semi-conductor reaction. All Police grade breathalysers and those used in medical environments are Fuel Cell technology. If you rely on an accurate reading every time over a long time, then always buy a breathalyzer for sale with Fuel cell technology. This is especially important for workplaces, hospitals and the like who may need a legally admissible result.

In the end, the decision comes down to what you need out of your breathalyser. Most people want a small device to take with them when out to monitor their approximate Blood Alcohol content. All devices available will do this in varying degrees (except for novelty devices that are little more than toys).