The Mr-Black-03 is a high-performance, portable breath alcohol tester designed for both professional and personal use. Built with a high-performance 32-bit embedded processor and a reliable imported electrochemical fuel cell sensor, it delivers fast, accurate, and stable alcohol concentration measurements.
With its compact gas circuit design, high-precision sampling system, and advanced algorithm, the Mr-Black-03 ensures professional-grade accuracy in a pocket-sized device. The entire testing process is simplified to a single-button operation, with an intuitive on-screen display guiding the user through the blowing process.

Key Features
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Professional-Grade Sensor: Imported electrochemical fuel cell alcohol sensor for high reliability and accuracy.
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Dual Test Modes: Quick checking and accurate checking modes for flexible testing scenarios.
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Four International Units: Switch between %-US, g/L-EU, mg/L-JP, and mg/100ml-CN.
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One-Key Operation: Complete the entire test with a single button press — intuitive and user-friendly.
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Dual Detection: Supports both contact (with mouthpiece) and non-contact testing.
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Data Storage: Automatically stores up to 10 test records for easy review.
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Compact & Portable: Pocket-sized design (138mm × 68mm × 30mm) weighing only ~140g.
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Rechargeable Battery: Built-in lithium battery with Android charging port for convenience.
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Bilingual Interface: Switch between Chinese and English languages.
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Certified Quality: Manufactured in strict accordance with GB/T 21254-2017 and JJG657-2006 standards.
Technical Specifications
| Project |
Indicators & Parameters |
| Alcohol Sensor Type |
Electrochemical fuel cell alcohol sensor |
| Measurement Range |
0 – 630 mg/100ml (breath alcohol concentration) |
| Resolution |
0.1 mg/100ml |
| Display |
128 × 160 color screen |
| Machine Size |
~138mm (L) × 68mm (W) × 30mm (H) |
| Instrument Weight |
~140g (including battery) |
| Battery |
Rechargeable lithium battery |
| Charging Port |
Android charging port |
| Operating Temperature |
-5°C ~ 40°C |
| Storage Temperature |
-20°C ~ 70°C |
| Blowing Continuity Detection |
2.5 seconds (flow: ≥ 20L/min) |
| Calibration Cycle |
6 months |
| Test Records |
10 stored records |
| Detection Modes |
Contact + Non-contact |
| Language Setting |
Chinese / English |
| Test Units |
%-US, g/L-EU, mg/L-JP, mg/100ml-CN |
Accuracy & Repeatability
Indication Error
| Alcohol Concentration Range (C) |
Error |
| C < 0.400 mg/100ml |
±0.020 mg/100ml |
| 0.400 ≤ C < 1.000 mg/100ml |
±5% |
| C ≥ 1.000 mg/100ml |
±20% |
Indication Repeatability
| Alcohol Concentration Range (C) |
Error |
| C < 0.400 mg/100ml |
0.06 mg/100ml |
| 0.400 ≤ C < 1.000 mg/100ml |
0.06 mg/100ml |
| C ≥ 1.000 mg/100ml |
6% |

What's Included
- 1 × Mr-Black-03 Alcohol Tester
- 5 × Disposable Blowpipes (mouthpieces)
- 1 × USB Charging Cable (Android port)
- 1 × User Manual
- 1 × Carrying Case
Six Core Technologies
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Imported Sensor — High-reliability electrochemical fuel cell sensor.
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Quick Testing — Rapid response time for instant screening.
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Multi-Person Continuous Test — Supports back-to-back testing for multiple users.
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Instant Results — Real-time display with no waiting.
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Data Automatic Storage — Saves the last 10 test records automatically.
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Strong Battery Life — Rechargeable lithium battery for extended use.

Ideal Applications
- Police & Law Enforcement
- Fleet Management
- Express & Logistics
- Corporate & Industrial
- Construction Sites
- Coal Mining & Heavy Industry
- Personal Use
- Workplace Safety Compliance
Frequently Asked Questions
How accurate is the Mr-Black-03?
The device uses an imported electrochemical fuel cell sensor, the same technology used in professional law enforcement breathalyzers. It meets GB/T 21254-2017 and JJG657-2006 standards with a resolution of 0.1 mg/100ml.
What is the difference between Quick Checking and Accurate Checking modes?
Quick checking provides a rapid screening result, ideal for high-volume testing. Accurate checking performs a more thorough analysis for precise measurement, suitable for official or compliance testing.
Can I use the device without a mouthpiece?
Yes. The Mr-Black-03 supports both contact (with a mouthpiece) and non-contact testing modes, making it hygienic for multi-person use.
How many test results can the device store?
The device automatically stores up to 10 test records, which can be reviewed directly on the color screen.
What measurement units are available?
You can switch between four units: %-US, g/L-EU, mg/L-JP, and mg/100ml-CN.
How do I charge the device?
The Mr-Black-03 features a rechargeable lithium battery and charges via a standard Android (micro-USB) charging port.
What is the operating temperature range?
The device operates safely between -5°C and 40°C. For storage, keep it between -20°C and 70°C.
Is this device suitable for professional/law enforcement use?
While the Mr-Black-03 is manufactured to professional standards and holds relevant certifications, it is positioned as a high-performance civilian device
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