is there a light to indicate full charge

Thanks for asking. Yes, the indicator light is Red during charging, and turn Green once it's full charged.

What does it detect? specifically? dust? mold/pollen? co2?

Thanks for asking! BT-5800D is specifically detect PM2.5 and PM10

Does this test the air for asbestos?

Hi Paul, Please be kindly informed that thsi air particulater meter BT-5800D could measure particles diameter 2.5um~10um. If the asbestos you mentioned is within its measure range, then it would be OK :)

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BTMETER Formaldehyde Detector PM2.5 PM10 Particulate Meter, Indoor Air Quality Tester Monitor HCHO TVOC Air Particle Dust for Home Office Factory Warehouse 5800S

Product ID: 314632197

Details

Brand
BTMETER
Colour
BT-5800S Air
Item weight
0.75 Pounds
Power source
Battery
Style
Industrial

🔋2000mAh USB rechargeable battery

🧪0-1.00mg/m³ HCHO electrochemical sensor

🌫️0-999.9μg/m³ PM2.5 & PM10 laser scattering

Description

🌬️ Breathe smarter, live better — your personal air quality guardian!

SMART DATA LOGGING - Automatically records air quality data over preset intervals, so you never miss a pollution spike or trend.
ALL DAY PORTABILITY - Lightweight 340g design with 15-hour USB rechargeable battery and auto power-off for hassle-free continuous monitoring.
DUAL PARTICLE POWER - Measures PM2.5 and PM10 particles down to 0.3μm with laser scattering tech for ultra-accurate dust and pollution tracking.
TOTAL VOC AWARENESS - Monitors TVOC levels from 0-10mg/m³ with fine 0.05mg/m³ resolution, empowering smarter ventilation decisions.
PRECISION AIR SAFETY - Detects formaldehyde with 5% accuracy and 0.01mg/m³ resolution to keep your indoor air truly safe.

The BTMETER BT-5800S is a professional-grade indoor air quality monitor combining an industrial electrochemical formaldehyde sensor, laser scattering particulate matter detection (PM2.5 & PM10), and a semiconductor TVOC sensor. It offers high-resolution readings, data logging with customizable intervals, and a rechargeable 2000mAh battery for up to 15 hours of continuous use. Ideal for home, office, or industrial environments, it empowers users to proactively manage and improve indoor air safety.

Specifications

ASIN	B07H3NXNDV
ASIN	B07H3NXNDV
Alarm	Visual
Brand	BTMETER
Built-In Media	1* Formaldehyde Detector, 1*User manual
Color	BT-5800S Air Particulate Meter
Customer Reviews	3.5 3.5 out of 5 stars (23)
Customer reviews	3.5 3.5 out of 5 stars (23)
Date First Available	19 October 2018
Enclosure Material	Plastic
Is Discontinued By Manufacturer	No
Item Weight	340 g
Item model number	BT-5800S
Manufacturer	BTMETER
Manufacturer	BTMETER
Mfr Part Number	BT-5800S
Model Number	BT-5800S
Operating Humidity	20 percent
Power Source	Battery Powered
Product Dimensions	19.58 x 4.6 x 9.5 cm; 340.19 g
Product Style	Industrial
Sensor Type	Electrochemical
UPC	703546921951
Unit Count	1.0 Count

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