The VPF-730 sensor is capable of measuring forward scattering, visibility, and current weather (WMO 4680), as well as measuring precipitation type and intensity. Sensors are compact and durable instruments that are ideal for use in extreme weather conditions.

Weather phenomena

Weather phenomena include all forms of liquid and frozen precipitation, such as rain, drizzle, snow, snow particles, snow flakes, ice particles, and hail, as well as suspended particles such as fog, mist, dust, and smoke.

measuring principle

The VPF-730 sensor uses infrared technology to measure scattered particles in the sample area, calculate the EXCO (atmospheric extinction coefficient), and then derive the MOR (meteorological optical range) and visibility from the EXCO.

data output

Sensors are usedRS232C is used as the standard signal output. The data output is in the form of various ASCII character bars, and the sensor can be set to automatic data output or called output format. The data can be transmitted to the microcomputer for processing and storage.

Maintenance, calibration, and automatic detection

The sensor has been calibrated before leaving the factory. During normal maintenance, only one person needs to calibrate the sensor within a few minutes. The working status of the sensor is obtained through automatic detection function.

Unparalleled precision

The design, light source, wavelength, and optical structure of HSS sensors give them world-class accuracy.

DesignDue to the use of unique brick technology,HSS sensors are widely recognized for their good correction of atmospheric extinction coefficient (EXCO), resulting in improved visibility.

light sourceThe light source is an infrared diode, which has been proven to have higher accuracy, longer lifespan, and continuous reading than visible light. It has the advantages of brick technologyThe design of HSS sensors means that other sensors cannot achieve their performance.

wavelength：The light source and wavelength (850nm) selected by HSS are considered to have good accuracy around 1 mile, with excellent frequency shift performance for wavelengths ranging from white light (visibility below 1 mile) to blue light (visibility from 1 mile to several miles). Other forward scattering sensors can detect the white light spectrum, while HSS sensors can detect the frequency shift from white light to blue light spectrum, ensuring accuracy in high visibility ranges.

Optical structureThe reflection of light from snow and surface water accumulation may cause measurement errors, which is a common phenomenon in some sensors,The HSS sensor probe is horizontal, which ensures that the measurement is not affected by ground reflections and also has a undisturbed sample area under strong winds and precipitation.

Product Features

※ Capable of outputting15 current weather codes in WMO code table 4680

※ All day stable measurement

Long term trouble free lifespan

※Hard coated anodized aluminum material, high corrosion resistance

※ It has system self check and emission window pollution monitoring functions

※ Not affected by obstacle warning lights

ALS-2 background light sensor (ambient light sensor) can be optionally used to calculate airport runway visual range (RVR)

※ Orders can be placed for AC or DC power supply versions

The visibility range is between 10m and 75km

Principle of 45 ° Infrared Forward Scattering Measurement