MD-644 - Breathalyzer Innoliving - Free user manual and instructions

Product Type	Breathalyzer (Alcohol tester)
Brand	Innoliving
Model	MD-644
Sensor Type	Semiconductor gas sensor
Measurement Range	0.0‰ to 4.0‰ BAC (Blood Alcohol Concentration)
Measurement Accuracy	±0.1‰ at 0.5‰
Measurement Time	Approx. 10 seconds
Warm-up Time	Approx. 10 seconds
Display	LED light indicator: Green (safe), Yellow (caution), Red (alert)
Power Supply	2 x AAA batteries (1.5V) (included)
Battery Life	Approx. 300 tests
Automatic Shut-off	Yes, after 30 seconds of inactivity
Dimensions	120 x 50 x 20 mm
Weight	50 g (including batteries)
Operating Temperature	10°C to 40°C
Storage Temperature	-10°C to 50°C
Certification	CE
Cleaning	Wipe mouthpiece with a soft cloth; do not use chemicals or immerse in water
Calibration	Factory calibrated; recommended recalibration every 6 months or after 1000 tests
Included Accessories	2 x AAA batteries, user manual
Warranty	1 year against manufacturing defects

Frequently Asked Questions - MD-644 Innoliving

How do I use the Innoliving MD-644 breathalyzer?

Turn on the device by pressing the power button. Wait for the warm-up indicator (usually a steady light). Blow steadily into the mouthpiece for about 5 seconds. The LED will indicate your alcohol level: green for safe, yellow for caution, red for alert. The result is displayed for a few seconds then the device shuts off automatically.

How accurate is the MD-644?

The MD-644 uses a semiconductor sensor and is accurate to within ±0.1‰ at 0.5‰ BAC. However, it is for personal reference only and not for legal purposes. Accuracy can be affected by environmental factors and improper use.

What do the different color lights mean?

Green indicates a BAC below 0.5‰ (safe). Yellow indicates between 0.5‰ and 1.2‰ (caution). Red indicates above 1.2‰ (alert). These thresholds may vary by country; refer to local laws.

How do I replace the batteries?

Open the battery compartment on the back of the device. Remove old batteries and insert two new AAA batteries following the polarity markings. Close the compartment securely.

How often should I calibrate the device?

The device is factory calibrated. For best performance, recalibrate every 6 months or after approximately 1000 tests. Contact Innoliving customer service for calibration services.

Can I use the device immediately after drinking alcohol?

No. Wait at least 20 minutes after consuming alcohol before testing, as alcohol needs time to be absorbed into the bloodstream. Testing too soon may give a falsely high reading from residual alcohol in the mouth.

How do I clean the mouthpiece?

Wipe the mouthpiece with a soft, dry cloth. Do not use water, chemicals, or immerse the device. For deep cleaning, use a slightly damp cloth and dry thoroughly. Avoid touching the sensor.

Is the MD-644 legally valid for court or law enforcement?

No. This device is for personal use only and does not have legal validity. Law enforcement uses evidential breathalyzers that meet specific standards. Do not rely on this device to determine if you are safe to drive.

Why does my device show an error message or blink?

Error blinking may indicate low battery, sensor malfunction, or improper blow. Replace batteries, ensure you blow steadily for the full duration, and avoid using near strong fumes. If error persists, contact support.

How long does the device last?

With proper care, the MD-644 can last several years. The sensor lifespan is typically around 1-2 years or 2000-3000 tests, depending on usage and storage conditions. Replace the device if readings become inconsistent.

USER MANUAL MD-644 Innoliving

USER MANUAL

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only in order to promote a responsible and safe setting. It provides a purely and selective measurement, it doesn't reduce or put out possible risks conducted by competent author ties, which can drive different readings. The faster meetings have no legal value and do not re leave any individual responsibility, improper damage of the product and/or improper use of the product may affect the security of the measurement. You should not rely upon it as the so basic to determine rates of challenge on whether it is safe to drive a vehicle, carer equipment, or engage in dangerous activities. Involving Sca is

not liable for the improper use of this product for any reason. • Before use, make sure that the applicable method without visible damage if in doubt, do not use the product and contact the author and other sales service. • After use, always store the product store from sources of level, sunlight, humidity, sharp objects and similar. • Do not use a control substances such as paint or plasticated near the basket. • Do not use chemicals to clean the basket. Never imports the product in water or other liquids. The sensor could be damaged.

- Do not attempt to repair the product yourself, under penalty of installation of the warranty, but always contact the authorities for your service. - It takes about 20 minutes for a control to be absorbed into the bloodstream by the digenerate writing, therefore, it is recommended to take the measurement 20 minutes after consuming alcoholic beverages. If the measurement is taken immediately after drinking, the results may reflect the concentration of alcohol in the drink and not the actual concentration in the class. - To order in more accurate measurement

results, the interval between two seconds: pulse measurements should be more than 2 minutes. PRODUCT DESCRIPTION

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Depending on the color detected, the light indicator taken on a different colour ● Color range from 0.5 μg to 3.7 μg ● White range from 0.5 μg to 3.7 μg ● Red range from 1.2 μg to 4.0 μg

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