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disposable portable Breath-type alcohol tester that can clearly see the numbers

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Quick Details

Brand Name: greattop
Function: Breath Alcohol Tester Safety
Usage: Personal Testing
Type: Blood & Gas Analysis System
Place of Origin: Guangdong China
performance: SMD assembling, stable performance
color: black
mouthpiece: 5pcs
backlight: blue color
sensor: Advanced NM Hot-wire alcohol sensor
control: Smart MCU control
Model Number: AT 818
LCD indication: Direct testing process LCD indication
Packaging Detail: each gift box for each product,each product with one cloth bag and with 5pcs mouthpieces,60pcs/carton.
Selling Units: Single item
Single package size: 17X12X4.5 cm
Single gross weight: 0.2 KG
Package Preview: https://sc04.alicdn.com/kf/H731d658581324797ab2fe7a2d8adef8ex.jpg_640x640.jpg,https://sc04.alicdn.com/kf/Hef6caf3d6438476195558f4da1b60a20w.jpg_640x640.jpg
Greattop Electronic Company Limited
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US$ 30,000+
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disposable alcohol breath tester     


Reminding Before your testing.

Alco Smart Breath tester should be used only to give an indication of the possible presence of alcohol in the breath/blood. You should not rely upon it as the sole basis to determine intoxication or whether it is safe to drive a vehicle, operate equipment, or engage in dangerous activities.

Everyone has different body responds to alcohol consumption and his testing result only as reference, not a subject standard for consequent decision.

The manufacture, importer or distributor takes no responsibility whatsoever for the use of this product for any reason. This product must not be used as a tool for determining whether a person is able to operate a motor vehicle or device legally or safely. The intake of any alcohol will impair reflexes and judgment to operate motor vehicle.

Before your testing, please view the manual carefully and follow the instruction strictly.

General Introduction

GT-ALT-11 breath alcohol tester is kind of tester designed to measure concentration result of the breathed alcohol in the human body. This device adopts advanced NM Hot-wire alcohol sensor which has excellent sensitivity and reproducibility, fashion and portable design make it more convenient for personal use. When the alcohol content exceeds the preset limited level, this device would send an audio and video warning to remind your safety. 

Main Feature:

 Advanced NM Hot-wire alcohol sensor 


Quick response


SMD assembling, stable performance 


Smart MCU control


 Direct testing process LCD indication 


Digital LCD display with light blue backup 


Portable and fashion design


Audio warning beyond pre-set limit 


Sensor Fault Self checking 


Battery saved design, low voltage indication


Technical Data

Sensor type: NM Hot-wire alcohol sensor 

Detection Range: 0.000~0.199%BAC; 0.00~1.99‰BAC; 0.00~0.99mg/L 

Alarming Level: 05%BAC, 0.25mg/L; 0.5‰BAC

Accuracy: ±10% F.S

Response Time: <5s     Warm-up Time: <20s

Resume Time: ≤20s

Working Voltage: DC4.5V(3×AAA)Batteries; Working Current: ≤120mA

Working Environment: Temperature -10°C~50°C Relative Humidity ≤95% No Dews

Display: 3 digitals LCD display with blue backlight

Dimension:103×65×27mm (L×W×H), ≤64 g Battery excluded 

1. Structure and Function Guide

1.1 Structure Guide picture: 

01.jpg       02.jpg




Buzzer hole


Switch Button


Input for external power


LCD Screen


Vent hole














1.2. Function Guide











2. Operation Instruction


2.1. Slide down the battery compartment on the back side, insert 3pcs AAA 1.5V batteries inside according to battery polarity indication and close it.


2.2. Press the power button for 1S, after 1 beep sound, “ warm up “ will be displayed on LCD , after 20 second with 1 “beep“ sound, “ blow” will be displayed on LCD and start to countdown and inform for testing.


2.3. Blow directly to the mouthpiece, after 4 seconds with 1 ”beep” sound to inform to stop blowing and the test result will be displayed on LCD. 


2.4. Unit switch: On test result mode, press “power“ button to change the unit (% BAC-‰BAC -mg/l) the final unit will be displayed for next test. 


2.5. Auto Power off: tester will auto power off after test result show on LCD for 20 Seconds. 


2.6. The LCD flickering indicates low power of batteries, please replace two “AAA” alkaline batteries 


2.7. Sensor fault self checking : when turn on , tester will check sensor’s mode is normal or abnormal, if some abnormal thing is found which can auto repair ( about 10 seconds), if can not be repaired, LCD will display “ ER”.


2.8. If a new testing needed, press the switch button again and repeat the above step 4.2~


3. Notification 

3.1. Avoid any fall or strong shock. 

3.2. If noise gas with high concentration existed, may the tester won’t work normally. 

3.3. If testing is done under low voltage, certain error will be existed between the real value. 

3.4. To ensure the testing result, please wait 10 min to take the testing after your drinking. 

3.5. Please operate it strictly according to this instruction. If long time not use, when you first begin a new testing, the first two times testing result may be unreliable, just begin testing from the third time, otherwise the result will also not be accurate. 

3.6. Do not keep the tester in the environment of Corrosive gas (Chlorine etc) for use or deposit, also in other bad surroundings. 

3.7. Under normal detections, sensor life could be more than two years.

3.8. After Long time use, there may be dirt on the tester, please use clean cloth to wipe off. Do not use any hard object or the solvent with any Corrosive ingredient. 

Remarks: Common Fault and Solving solutions 


Possible reason


NO display on LCD

Incorrect battery installation

Insert battery correctly according to polarity

Low battery seriously

New battery replacement

Circuit fault

Contact distributor

No response to

detection gas

not complete Warm-up

Waiting complete Warm-up

Circuit fault

Contact distributor

FFF display then power off

Sensor fault

Contact distributor

Low voltage display then power off

Low battery seriously

New battery replacement




To keep the continuous improvement of the products, we reserve the right to improve design without prior notice.  

The table of comparison for Alcohol in Blood between the mg/L and BAC 

The level of Alcohol display in BAC 0.00%

The level of Alcohol display in mg/L