Introduction
This manual provides essential information for the proper setup, operation, and maintenance of your BACtrack C8 Breathalyzer. The BACtrack C8 is a professional-grade breath alcohol tester designed for personal use, utilizing BluFire Fuel Cell Sensor technology for accurate blood alcohol content (BAC) estimations.
Please read this manual thoroughly before using the device to ensure optimal performance and safety.

Image: Two BACtrack C8 Breathalyzers displaying 0.046% BAC, alongside a box of 50 disposable mouthpieces. This bundle includes two devices and a supply of mouthpieces for multiple uses.
Package Contents
- BACtrack C8 Breathalyzer (2 units)
- Disposable Mouthpieces (50 units)
- USB Charging Cable
- User Manual (this document)
Setup
1. Charging the Device
Before first use, fully charge your BACtrack C8. Connect the provided USB charging cable to the device's charging port and plug the other end into a USB power source (e.g., computer, wall adapter). The charging indicator will show progress and turn off when fully charged.
2. Attaching a Mouthpiece
Firmly insert a mouthpiece into the designated slot on the BACtrack C8 until it clicks into place. Ensure it is securely attached to prevent air leakage during testing.

Image: A BACtrack C8 Breathalyzer shown with a mouthpiece correctly inserted. The mouthpiece ensures hygienic and accurate testing.
3. Optional: Connecting to the BACtrack App
The BACtrack C8 can be used in "Standalone Mode" or "App Mode." For "App Mode," download the BACtrack App from your smartphone's app store. Enable Bluetooth on your phone and follow the in-app instructions to pair your device.

Image: A BACtrack C8 Breathalyzer showing a BAC reading, alongside a smartphone displaying the BACtrack app interface with historical BAC results and the ZeroLine feature. This illustrates the device's connectivity with the mobile application.
Operating Instructions
1. Powering On
Press and hold the power button until the device powers on and displays a countdown.
2. Performing a Test
- Wait at least 15 minutes after eating, drinking, or smoking before testing. This allows residual alcohol in the mouth to dissipate, ensuring accurate results.
- Once the device indicates it is ready (e.g., "BLOW" prompt), take a deep breath.
- Blow steadily and continuously into the mouthpiece for approximately 5 seconds until the device beeps or indicates the sample is complete.
- The BAC result will be displayed on the device screen. If in "App Mode," the result will also appear in the BACtrack App.

Image: A person demonstrating the correct way to blow into the BACtrack C8 Breathalyzer. Proper technique is crucial for accurate readings.
3. Understanding ZeroLine Technology
The BACtrack C8, especially when used with the app, features ZeroLine technology. This estimates the time until your Blood Alcohol Content (BAC) is expected to return to 0.00%. This feature is an estimate and should not be used as a definitive guide for driving or other activities requiring sobriety.
Maintenance
Cleaning the Device
Wipe the exterior of the BACtrack C8 with a soft, damp cloth. Do not use abrasive cleaners or submerge the device in water. Ensure no liquid enters the mouthpiece slot or sensor opening.
Mouthpiece Replacement
Always use a new, clean mouthpiece for each test to ensure hygiene and accuracy. Dispose of used mouthpieces properly.

Image: A box containing 50 disposable BACtrack mouthpieces, emphasizing the importance of using fresh mouthpieces for each test.
Recalibration
All breathalyzers, including BACtrack devices, require periodic recalibration to maintain accuracy. Refer to the BACtrack website or contact customer support for information on recalibration services and recommended intervals.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on. | Low battery. | Charge the device fully using the provided USB cable. |
| Inaccurate readings. |
|
|
| Cannot connect to BACtrack App. |
|
|
Specifications
- Sensor Technology: BluFire Fuel Cell Sensor
- Detection Range: 0.000 - 0.400% BAC
- Power Source: Rechargeable Lithium-ion Battery
- Connectivity: Bluetooth (for App Mode)
- Dimensions: (Refer to product packaging for exact dimensions)
- Weight: (Refer to product packaging for exact weight)
- Operating Temperature: 32-104°F (0-40°C)
Warranty and Support
Warranty Information
The BACtrack C8 Breathalyzer comes with a one-year warranty. If your device ceases to function properly during the first year of operation due to a manufacturing defect, BACtrack will repair or replace the defective product. This warranty does not cover damage caused by misuse, accidents, or unauthorized modifications.
Customer Support
For technical assistance, recalibration services, or warranty claims, please visit the official BACtrack website or contact their customer support team.
Website: www.BACtrack.com





