1.Product
The NJD-2 Visibility Meter is designed for measurements related to meteorological visibility, with a measurement range of 5 to 100,000 meters (customizable range available). NJD-2 sensor is based on the principle of forward aerosol scattering. It is widely used for monitoring visibility values in situations of low visibility on highways and roads.
The operational principle of the NJD-2 is based on the measurement of atmospheric extinction coefficient (or atmospheric light attenuation coefficient) using forward scattering technology. According to the Koschmider principle, there exists a functional relationship between Meteorological Optical Range (MOR) and extinction coefficient (σ). According to the formula, by accurately determining σ, the MOR value can be calculated, which can then be converted into visibility.
The NJD-2 Visibility Meter consists of stable infrared emission light source, highly sensitive and wide dynamic range infrared scattering light receiver, signal acquisition and processing unit, controller, heater, power supply, modulation-demodulation unit, protective cover, corrosion-resistant bracket, stainless steel casing, and other components.
2.Options
1)Free software platform for data management.
2)Multiple communication options available: Standard RS232/RS485 communication, compatible with the standard MODBUS communication protocol.
3)Can achieve remote wireless data communication through various methods such as GPRS, RJ45, and wireless transmission.
4)Measurement range can be custom produced within the range of 5 to 100,000 meters.
3.Technical Specifications
Mechanical Specifications
Performance
Measurement performance
4.Feature
1)Integrated structural design, compact sensor size, lightweight, and easy installation.
2)The downward tilt angle design effectively prevents contamination from dust, rain, snow, and sunlight. It also prevents strong light sources like headlights from directly entering the optical system, avoiding detection area blindness and signal-to-noise ratio degradation to ensure measurement performance.
3)The optical unit is treated with light extinction internally to prevent secondary stray light interference and enhance measurement performance.
4)The window lens has undergone special coating treatment to effectively prevent contamination and corrosion. It features anti-fogging and defrosting functions, making it suitable for coastal areas.
5)Equipped with an optical transmitter and scattering receiver, including high-speed digital signal processing and control components with self-diagnostic function.
6)The instrument has lightning protection measures to reduce damage from lightning strikes.
7)Designed with IP65 protection, it can be used for long periods in harsh outdoor weather conditions.
For more information, please contact me.
