Atmospheric visibility meter

Atmospheric visibility meter is a kind of instrument used to measure the visibility in the atmosphere, which can monitor and record the change of atmospheric visibility in real time, and is usually widely used in the fields of transportation, meteorology, environmental protection and so on. Its working principle is mainly based on optical sensing technology.

The atmospheric visibility meter calculates the visibility in the atmosphere by transmitting a light beam of a specific wavelength, then receiving reflected or transmitted light, and calculating the visibility according to the intensity of the received light signal. In weather conditions such as fog, smoke, rain, and snow, these particles scatter light, which affects the propagation of light and therefore the visibility measurement.

When it comes to atmospheric VISIBILITY METERS, there are several different technologies that can be used to measure visibility, including optical sensors, LIDAR, and microwave radar.

Atmospheric visibility meters typically use optical principles to make measurements. The most common of these are those based on the principle of "forward scattering". The principle of operation is as follows:

1. Emission of light: The detector emits a beam of light through an LED or a laser.

2. Scattering: The light is scattered by air molecules as it travels through the atmosphere.

3. Received by the receiver: The photodiode or photodetector at the other end collects the scattered light

4. Calculation of distance: The distance the light beam travels in the atmosphere can be determined by calculating the time elapsed from emission to reception of the light. Since the speed of propagation of the light is known, the visibility can be deduced from the time.

In good atmospheric conditions, the intensity of light received is higher; while in the presence of fog, smoke, rain, snow, etc., the intensity of light received is reduced.

Atmospheric visibility meter application scenarios include but are not limited to:

1. Air traffic: Atmospheric visibility is critical to flight safety when aircraft take off and land. Visibility detectors can provide real-time visibility information to pilots and air traffic controllers to help them make safe flight decisions.

2. Road traffic: In weather with low visibility, such as foggy days, traffic accidents are likely to occur on roads. Visibility detectors installed alongside roads can provide early warning to drivers and traffic managers.

3. Meteorology: Atmospheric visibility detectors are used in weather stations and weather warning systems to monitor weather changes and provide accurate meteorological data.

4. Environmental monitoring: used to monitor air quality, diffusion of atmospheric pollutants, etc., providing data support for environmental protection.

5. scientific research: in the field of earth science, environmental science and other fields, atmospheric visibility data is very important for the study of the structure of the atmosphere and climate change and other scientific issues.

The main advantage of atmospheric visibility meter is its real-time and accuracy, which can help people understand the atmospheric conditions in time, so as to effectively improve the quality of life and work efficiency.

Overall, the atmospheric visibility meter plays an important role in ensuring traffic safety, providing accurate weather services, and conducting environmental monitoring.

Product details: https://www.niubol.com/Automatic-Weather-Stations/Visibility-Sensors-Atmospheric.html

visibility sensors data sheet 

NBL-W-VS-Visibility-Sensor-Instruction-Manual.pdf