US20 IPS 5.0 Inches 2-Way Articulating Borescope Inspection Camera,HD 1080P Endoscope LED Illumination Lens For Car Aircraft Plumbing
🔶 Minimum Order Quantity: 1
🔶 Brand Name: QBH
🔶 Model: US19
🔶 Probe Diameter: Φ4.9mm / Φ6.0mm / Φ8.5mm
🔶 Tube Length: Standard 1m, Maximum 20m
🔶 Warranty: 1 Year
🔶 Origin: China (Mainland)
🔶 Certificates: CE ISO FCC
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A: The following are the testing standards of the detector. Exceeding the following values is considered as exceeding the standard.0. 6mg/m3 (GB/T18883-2002 and GB50325-2001 Class II civilconstruction projects)
A: The following are the testing standards of the detector. Exceeding the following values is considered as exceeding the standard.<0.10mg/m3 (GB/T18883-2002 “Indoor Air Quality Standard”)
A: PM2.5 data is changing all the time, with airflow and wind direction changes in environmental factors such as humidity, smoking in the room, cooking fumes, exhaust emissions from cars, coal burning, chimneys, furnaces and other pollution sources will change the PM2.5 value of this area, resulting in differences in test data.
A: Because the location and conditions of the test are difficult to match the meteorological station’s weather. There are usually several sampling points in the city. The data measured at each sampling point is also very different. The location of the sampling points is strictly required: the height is 3-30 meters, the air circulation, and the bacon cannot be close. A significant source of pollution such as kiln. Moreover, there should be no access to tall buildings, trees or other obstacles that impede the circulation of ambient air around the instrument.
A: Concentration unit: ug/m3
| Air quality level | 24-hour PM2.5 average standard value |
| Excellent | 0~35 |
| Good | 35-75 |
| Mild pollution | 75-115 |
| Moderate pollution | 115-150 |
| Severe pollution | 150-250 |
| Severe pollution | 250, and above |
A: Yes, formaldehyde is a slow volatilizing gas, usually used in most of furniture, clothing, and coating paint, this volatilizing process may last for 10 years, so for your health, window ventilation is necessary.
