LEMONBEST LCD Display CO Carbon Monoxide Poisoning Smoke Gas Sensor Warning Smoke Alarm Detector


Test/reset button to verify proper unit operation and reset the unit during CO alarm.
Protect your family against the danger of carbon monoxide.
Battery-powered and built-in carbon monoxide sensor makes it safe to use.

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Please kindly noticed that the smoke and fire contain CO and this item gives you the alarm when the CO density up to the lowest sensor amount. Thank you!

Color: White.

Sensor: Electrochemical CO sensor.

Alarm Style: designed in step with UL2034/EN50291

Sensitivity/Alarm Time: Within 60~90 minutes at 50ppm CO concentration; Within 10~40 minutes at 100ppm CO concentration; Within 3 minutes at 300ppm CO concentration

LCD Displayer (optional): 4 digits LCD displayer.

Audibility: 85dB ( at 1m distance ), Frequency 3 – 0.5KHZ.

Standby Current: 50mA.

Alarm Current: 50mA.

Standby Mode: Green Led flashes once each and every 30 seconds.

Alarm Mode : Red Led quickly flashes 4 times with unit chirping each and every 5 seconds, then repeat.

Low-bat Indicator: Chirp each and every 30s as battery lower than 3.3V with green LED flashing and Lb on LCD.

Mal-function Indicator: Chirp each and every 30s with green LED out and Err on LCD.

Power consumption: 0.3mW.

Size: 10 x 10 x 3.5cm.

Powered By: 3 x AA Batteries (Not included).


1, ceiling installation

2, wall mount (from the roof about 30CM)

This product is to detect carbon monoxide gas (such as coal briquettes, coal stove, coal soot), can not detect natural gas, liquefied petroleum gas, city gas pipeline.

Package including:

1xCarbon Monoxide Detector

2 x Screws

1 x English User Manual
Test/reset button to make sure proper unit operation and reset the unit right through CO alarm.
Offer protection to your circle of relatives against the danger of carbon monoxide.
Battery-powered and built-in carbon monoxide sensor makes it secure to use.
Low voltage warning and end-of-life timer. The smoke and fire contain CO and it’s going to provide the alarm when the CO density up to the lowest sensor amount.
Green and red LED lights that indicate normal operation and alarm status.