The BACtrack Select S50 comes with 6 individually wrapped replaceable mouthpieces. Simply attach a mouthpiece, press power, and begin testing in a matter of seconds.
The S50's proprietary FlowCheck™ feature ensures that a continuous deep lung air sample is taken every test. This maximizes accuracy and reliability.
When the countdown approaches 10, begin to inhale a deep breath. When the countdown reaches zero, the READY light will flash and two beeps will sound. Blow hard, continuously, for five full seconds. While a user is blowing, the BACtrack will sound a continuous tone.
Keep blowing until two beeps are heard. Once the sensor technology has analyzed the breath sample, the estimated BAC (Blood Alcohol Content) value is flashed on the screen.
| | Professional Series | Consumer Series | Disposable Units |
| Model |

S80 Pro |

S75 Pro |
Element |

S70 |

B70 White Black |

S50 |

S30 |  SingleShot 0.02%BAC 5-pack 10-pack 50-pack 100-pack SingleShot 0.05%BAC 5-pack 10-pack 50-pack 100-pack SingleShot 0.08%BAC 5-pack 10-pack 50-pack 100-pack
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| Sensor Technology | Xtend™ ElectroChemical Fuel Cell Sensor | Xtend™ ElectroChemical Fuel Cell Sensor | Xtend™ ElectroChemical Fuel Cell Sensor | Advanced Semiconductor | Advanced BluFire Semiconductor | Advanced Semiconductor | Advanced MicroCheck™ Semiconductor | Reactive Crystal Particle (RCP™) Technology |
| Sensor Accuracy | +/-0.005 @ 0.050, 0.100, and 0.150 %BAC | +/-0.005 @ 0.050, 0.100, and 0.150 %BAC | +/- 0.005 at 0.050, 0.100, and 0.150 %BAC | +/-0.01 @ 0.05 %BAC | +/-0.01 @ 0.05 %BAC | +/-0.01 @ 0.05 %BAC | +/-0.01 @ 0.05 %BAC | Clinically proven to be over 99% accurate |
| Key Features | Police-grade fuel cell sensor with internal pump system. The most accurate fuel cell sensor breathalyzer from BACtrack. | Police-grade fuel cell sensor with internal pump system, and a unique front-facing mouthpiece for ease of use. | Police-grade fuel cell sensor with internal pump system. The World's Smallest Full-Feature Fuel Cell Breathalyzer. | Compact size; on-screen menu for customizing testing options. | Easy testing by exhaling into the dual flow breath chamber, so mouthpieces are not necessary. Compact size and sleek design. | Rugged design, included ruby-red LED for low light situations; affordable price. | Very small size; affordable price. | Miniature size, low cost, and disposable. |
| Appropriate Users | • Law Enforcement • Corrections • DOT Alcohol Screening • Military • Hospitals | • Clinics • Businesses • Schools • Personal Use | | • Businesses • Schools • Clinics performing Alcohol Screening • Personal Use |
| • Personal Use | • Law Enforcement • Corrections • DOT Alcohol Screening • Military • Hospitals • Clinics • Businesses • Schools • Personal Use |
| Automatic Internal Breath Pump |  |  |  | | | | | |
| Takes Deep Lung Air Sample |  |  |  |  |  |  |  |  |
| Number of Decimal Places Displayed in Test Result | Three Example: 0.084 %BAC | Three Example: 0.084 %BAC | Three Example: 0.084 %BAC | Three Example: 0.084 %BAC | Two Example: 0.08 %BAC | Two Example: 0.08 %BAC | Two Example: 0.08 %BAC | Change in color indicates results (no digits displayed) |
| Dimensions | 2.3 x 4.8 x 0.8 inches | 2.3 x 4.8 x 1.0 inches | 2.0 x 4.75 x 0.75 inches | 2.3 x 4.8 x 0.8 inches | 4.25 x 1.63 x 0.81 inches | 2.3 x 4.5 x 1.0 inches | 1.33 x 4.05 x 0.98 inches | 2.75 x .375 x .375 inches |
| Weight | 4.8 oz (136g) | 4.4 oz (125g) | 4.4 oz (125g) | 4.2 oz (119g) | 1.4 oz (39.7g) | 3.88 oz (110g) | 1.87 oz (53g) | 0.2 oz (5.7 grams) |
| Mouthpiece Used | Standard BACtrack Series Mouthpiece | Standard BACtrack Series Mouthpiece | Standard BACtrack Series Mouthpiece | Standard BACtrack Series Mouthpiece | No Mouthpiece Needed or Used | Standard BACtrack Series Mouthpiece | Standard BACtrack Series Mouthpiece | No Mouthpiece Needed or Used |
| Mouthpiece Included | 6 | 6 | 5 | 6 | 6 | 2 |
| Power Source | 2 AA Batteries included | 2 AA Batteries included | 2 AA Batteries included | 2 AA Batteries included | 2 AA Batteries not included | 2 AA Batteries included | 2 AAA Batteries included | |
| Warranty | Full One-year Warranty | Full One-year Warranty | Full One-year Warranty | Full One-year Warranty | Full One-year Warranty | Full One-year Warranty | Full One-year Warranty | Shelf life: 18 months |