AlcoSense Lite 2 - User Manual

Questions and Answers

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ryanwillisJul 29, 2025
Why does my AlcoSense Lite 2 give different results?
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  greerscottJul 29, 2025
  If you've performed multiple breath tests with your AlcoSense Test Equipment and received different results, it's likely because the breath alcohol levels in your lungs haven't stabilized. This is expected behavior.
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Shannon SparksAug 6, 2025
What to do if AlcoSense Lite 2 Test Equipment gives strange result after many tests?
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  Mark BrownAug 6, 2025
  If you've conducted numerous tests in quick succession and obtained an unusual result with your AlcoSense Test Equipment, it could be caused by a build-up of breath condensation or alcohol vapor from previous tests within the breathalyser. To resolve this, allow a minimum of 5 minutes between tests, and avoid performing more than 5 tests in one hour or exceeding 20 tests in a 24-hour period. The condensation should evaporate within 2 hours at normal room temperature, and the breathalyser will return to normal operation.
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madisonharmonAug 17, 2025
Why does my AlcoSense Lite 2 show positive when I haven't had alcohol?
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  Nicole CannonAug 17, 2025
  If you've received a positive reading on your AlcoSense Test Equipment but haven't consumed any alcohol, it could be due to testing too soon (within 10 minutes) after eating strong foods, using dental products, chewing gum, or smoking. If this is the case, allow the unit to stand for a couple of hours and try again. Alternatively, it could be due to your body releasing acetone/ketones during the metabolism of acetoacetic acid. In this instance, consider using one of AlcoSense's Fuel Cell breathalysers.

Summary

Understanding Breathalyser Technology

Factors Affecting Breathalyser Readings

Guidelines on factors that impact breathalyser readings and correct usage.

Getting Started: Setup and Operation

First Time Setup

Step-by-step instructions for initial device configuration.

Setting the Blood Breath Ratio (BBR)

Configure the Blood Breath Ratio for your country of use.

Installing Batteries and Cleaning Sensor

Setting the Drink Drive Alert Level

How to Perform a Breath Test

Detailed steps on how to correctly conduct a breath test.

Understanding Test Results

Interpreting the different readings and error messages from the device.

Troubleshooting and Specifications

Troubleshooting Common Issues

Common problems and their solutions for the AlcoSense breathalyser.

The AlcoSense Lite 2 is a sensitive measurement device designed to provide an indication of blood alcohol levels through breath analysis. It is intended for personal use to help individuals make informed decisions about drinking and driving, particularly in the morning after consuming alcohol.

Function Description:

The device measures the concentration of alcohol vapor in a person's breath, which is then converted to an estimated blood alcohol concentration (BAC). It uses a semi-conductor sensor to detect alcohol. The AlcoSense Lite 2 displays readings in %BAC, and it can be configured to display different drink drive alert levels. The device performs a self-clean process upon startup to ensure accuracy. It also features a recalibration reminder to maintain its precision over time.

Important Technical Specifications:

Reading Range: 0.0‰BAC to 2.0‰BAC. Readings below 0.1‰BAC will display as "LO".
Accuracy: +/- 0.2‰BAC.
Operating Temperature: 5°C to 40°C.
Storage Temperatures: -10°C to 50°C.
Storage Conditions: Store in a cool, dry place out of direct sunlight.
Calibration Intervals: 12 months or 300 tests, whichever comes first.
Sensor: Semi-Conductor.
Power: Requires three AAA batteries.

Usage Features:

First Time Setup:
- Set the BBR (Blood Breath Ratio): The BBR must be set according to the user's country of use. This is done by opening the battery compartment and adjusting a small slide switch located in the top left-hand corner. The manual provides a table on the inside back cover for country-specific BBR settings (e.g., UK and Ireland use 2300:1).
- Install Batteries and Clean Sensor: Insert three AAA batteries. The device will perform a self-clean process lasting 1 to 2 minutes.
- Set the Drink Drive Alert Level: Users can set their preferred drink drive alert level (e.g., 0.2‰BAC, 0.3‰BAC, 0.5‰BAC, or OFF) by pressing and holding the power key and using a pen or thin object to press a button in a hole on the battery cover clip.
Performing a Breath Test:
- Insert a new blow tube into the blow hole on the left side of the breathalyser.
- Turn the unit on by pressing and holding the power key. The unit will display the number of days left until recalibration is due, then "Wait" while the sensor is heating.
- The AlcoSense will beep and the "blow" symbol will flash, indicating it's time to blow into the breathalyser using a pressure similar to a sigh for 6-7 seconds.
- The result will be displayed. If "FLO" or "ERR" appears, check the tips provided in the manual.
Important Usage Warnings:
- Do not perform a breath test less than 10 minutes after drinking, as high levels of alcohol directly from the mouth can permanently damage the sensor and cause inaccurate readings.
- Blood alcohol levels can continue to rise for up to 90 minutes after drinking; it is recommended to use the breathalyser after this time (and ideally the morning after) to ensure accurate readings.
- Do not blow directly into the blow hole without a blow tube to prevent sensor damage and reduced unit lifetime.
- Wait a minimum of 5 minutes between tests. Do not perform more than 5 tests in one hour and no more than 20 tests in 24 hours. Frequent testing can cause a build-up of breath condensation or alcohol vapor, affecting accuracy.
- Avoid testing after using mouthwash, breath spray, cough medicine, or anything else that may contain alcohol.
- Avoid testing after eating ripe fruit.
- Avoid testing in dirty air, e.g., a smoky room or pub.
- If you are breathing quickly (e.g., after running up stairs) or holding your breath, this can falsely lower or raise the reading.
- Perform two tests sequentially to get a variation between readings.
Understanding Results:
- "LO": Less than 0.1‰BAC.
- Alcohol present, but under the limit you set: Displays the BAC.
- Close to or above the limit set in the breathalyser: Displays the BAC with a "DO NOT DRIVE" symbol.
- "HI": Above 2.0‰BAC.
- "FLO": Breath flow error (pressure too low or too high).
- "Err": Error in reading (pressure too low or too high, or other issues).

Maintenance Features:

Recalibration: The breathalyser requires recalibration every 12 months or 300 tests. The unit will display "RECALIBRATE" on the screen when recalibration is due. Information on arranging recalibration is available on www.alcosense.co.uk.
Keep it Clean: Clean the AlcoSense with a soft dry cloth. A carry case is sold separately for protection.
Clean the Sensor Every 4-6 Weeks: Perform a sensor clean every 4-6 weeks. This involves removing the batteries, then re-inserting them. "Clean" will flash on the screen, and it will count down for a few seconds. This process removes oxidation or contaminants. If replacing batteries after a recent clean, double-click the power button to skip the process.
Battery Replacement: Use new, good quality branded AAA batteries. Avoid mixing new and used batteries or different types. Low battery voltage can cause inaccurate readings.
Careful Handling: Avoid dropping the AlcoSense, as sudden knocks can affect accuracy. If the unit is not reading correctly after a drop, contact customer support for servicing.
Accessories: Protective carry cases and packs of 20 spare blow tubes are available for purchase.