Product details
WeiguoIOT AT808 breathalyser – accurate home alcohol tester (blue)
If you’re after a reliable, pocket-sized breathalyser to check whether it’s sensible to drive or just to keep an eye on things after a night out, this one does the job with none of the faff. The AT808 uses a professional fuel-cell sensor — the same type found in many pro units — so its readings are far more dependable than the cheap semiconductor alternatives.
Key features and what they mean for you
The AT808 measures 0–0.40% BAC (that’s 0–2.0 mg/L or 0–4.00‰) with a fine 0.001% resolution and quoted accuracy of ±0.005% at 0.05% BAC. In plain terms: it gives quick, sensible results you can trust for personal use. Warm-up time is typically around 5 seconds, so there’s no hanging about.
- Fuel-cell sensor – delivers consistent, sensitive readings and better long-term stability.
- Multiple units – switch between %BAC, ‰BAC, mg/L, g/L or mg/100ml to suit your preference or local limits.
- Adjustable alarm – set the alert to match UK limits (or the lower Scottish thresholds) so it flags when you’re over your chosen point.
- Connectivity – pairs with the AlcoCHECK app via Bluetooth for unlimited history; the device itself stores up to 99 readings.
- Hygiene and portability – five replaceable mouthpieces are included and two AAA batteries power the unit, making it handy for home, the glovebox (not for use while driving), pubs or small workplaces.
Practical bits you might want to know
The device is compact (about 106 x 46 x 17 mm) and weighs roughly 53 g, so it slips into a pocket or glovebox without fuss. Calibration is recommended every 2,000 tests or roughly every six months depending on use — that’s standard for fuel-cell devices to keep accuracy where it should be. The app also shows colour-coded results (green for under limit, red for over), which is handy when you need to make a quick decision.
People often ask about battery life and calibration costs. Two AAA batteries run the unit and will last a fair while for occasional checks; if you’re testing every day you’ll need to replace them more often. Calibration is normal maintenance for accurate readings — if in doubt, check with a local calibration service or the manufacturer.
Who is this for and when to use it
- Anyone who wants a quick indication before setting off to reduce the risk of driving after drinking.
- Hosts or small businesses who need a simple, hygienic way to spot-check guests or staff.
- People who like to log readings over time — the device stores 99 entries and the app keeps unlimited history.
All told, the AT808 is a practical, straightforward breathalyser that strikes a good balance between accuracy, portability and easy data logging. It’s not a replacement for official roadside testing, but it’s a useful tool to help make better decisions and lower risk. If you’re unsure about specific situations — for example testing first thing on a cold morning or straight after using mouthwash — it’s sensible to follow the user manual or wait a short while after consuming anything that might affect the result.
Technical specifications
- Model: AT808
- Sensor type: Fuel cell
- Measurement range: 0–0.40% BAC (0–2.0 mg/L; 0–4.00‰; 0–4.00 g/L)
- Resolution: 0.001% BAC
- Accuracy: ±0.005% BAC at 0.05% BAC
- Warm-up time: ~5 seconds
- Display: LCD
- Units: %BAC, ‰BAC, mg/L, g/L, mg/100ml
- Records: 99 on device; unlimited on AlcoCHECK app
- Battery: 2 x 1.5V AAA (not included)
- Calibration: every 2,000 uses or approx. 6 months (recommended)
- Dimensions: 106 x 46 x 17 mm; Weight: ~53 g