
With the aim of providing smarter and more convenient living, LG has developed the intelligent PM 1.0 PM Sensor dust sensing technology to measure the amount of dust in the air and eliminate it, bringing a clean indoor space to your family. Join Mytour to explore the smart PM 1.0 dust sensing technology through the following article.
1. What is the PM 1.0 Dust Sensor on LG air conditioners?
The PM 1.0 dust sensing technology is integrated into the APFP product lines on LG air conditioners, allowing you to monitor the amount of dust in the air. The air quality is displayed through LED lights on the indoor unit. This enables you to easily monitor the index to improve and protect the health of your family.

2. How does the PM 1.0 Fine Dust Sensor technology on LG air conditioners work?
If the amount of dirt in the air is too high, LG air conditioners will activate the Air Purification function. This function operates in the following steps:
- Step 1: The sensor measures the amount of dirt pollution in the air and indicates it on the LED system on the indoor unit, with 6 displays ranging from purple to green.
- Step 2: The ionizer is activated and captures various types of dust, bacteria, and viruses in the air, retaining them in the filter membrane.
- Step 3: The filtration system removes various harmful bacteria and viruses here and releases them through the water discharge route.
Even when the cooling mode is not activated, the filter can still operate independently.

3. Dust index on LG indoor units and its significance
The dust index chart on LG air conditioners is calculated from dark red to green. The more dust, the darker the light will be. The air is clean and fresh when the light is green as shown on the chart.

Specifically:
- Dark red: The worst air quality, pollution level over 250 severely impacts health.
- Purple: Poor air quality, pollution level around 200.
- Red: Poor air quality, not safe for health, pollution level over 120.
- Orange: Moderate air quality, pollution level over 90.
- Yellow: Pollution level over 50, relatively safe air quality.
- Green: Good air quality, safe for health.

