Visibility Sensor【Atmospheric Visibility Measuring Instrument】

Visibility Sensor [Atmospheric Visibility Meter] [FT-N80] Sensor de visibilidat Atmospheric Visibility is defined as the maximum horizontal distance from the ground that a person with normal vision can still see the contour of a target under the weather conditions at that time
。 【Function introduction】:The emitter end of the atmospheric visibility measuring instrument emits infrared light through the infrared led light source, the infrared light source passes through a certain volume of air, which is scattered by the air gas molecules, aerosol particles, fog droplets, etc.
, and the receiving end of the visibility measuring instrument determines the visibility distance by receiving the intensity of the scattered light of the infrared light source, and the instrument can continuously measure the output
of the visibility.
【Detection principle】:35° forward scattering principle, more accurate
measurement.
【Overall appearance】: The integrated design of the overall hugging makes the layout of the internal cable more reasonable
.
【Measuring element】:Optical component lens, infrared LED light source
.
【Hardware protection design】:(1), the use of optical components lens facing down and with a protective cover, effectively prevent precipitation, droplets or dust into the lens, reduce the surface of the probe pollution, this design provides accurate measurement results and reduces the need for
maintenance.
(2) The protective cover of the probe is aluminum alloy material, and the surface is coated with anti-corrosion glass fiber coating
.
(3) The overvoltage and electromagnetic protection device of the visibility meter can ensure the long-term safe operation
of the sensor.
(4), infrared LED light source, increase filter design, anti-light source interference
.
(5) Low power consumption, anti-interference design
of internal circuit.
(6) The DC power supply circuit of the instrument has a dual design
of anti-reverse connection and self-recovery insurance.
【Equipment List】: 1 set of atmospheric visibility measuring instrument + 2 hoops
.
【Installation precautions】:(1), install the visibility sensor about 2 meters above the
ground.
(2) Ensure that there are no other objects under the visibility to interfere with the test
.
(3) The ideal installation site should be at least 100 meters away from large buildings or other facilities that generate heat and hinder rainfall, and also avoid the influence of
shade.
(4) The site should be free of obstacles, reflective surfaces and obvious pollution sources
that interfere with optical measurements.
(5), choose the appropriate place to install the equipment, the equipment provides the installation of the hoop, the use of the hoop to install the equipment to the 75mm pole, in order to avoid light source interference, the transmitter must be on the south side
.
【Power supply mode】:10-30vdc wide voltage power supply
.
【Measuring range】:Default 0-800000m
.
【Measurement error】:≤1KM±2%; ±10%>1KM
。 【Resolution】:1m【Update interval】:20s【Average time of failure】:(MTBF)Larger than 18,000 hours【Operating ambient temperature】:-40~60°C [Operating relative humidity]:Not more than 95%(30°C)【Weight】:Less than 10kg【Power consumption】:0.
5w【Infrared wavelength】:870nm【Signal output mode】:RS485,Standard modbus-rtu protocol【Measurable visibility data type】:(1)、Real-time visibility value (2)," Visibility 10min average (3), visibility 1min average [optical lens cleanliness]: can read the infrared light emitter, the receiver of the lens cleanliness in real time, cleanliness level 1-5, 5 represents the highest cleanliness, when the cleanliness is less than 3 when the on-site cleaning of the optical lens
needs to be cleaned on the spot 。 【Visibility common sense】:1.
Visibility 20-30 km good visibility Clear field 2.
Visibility 15-25 km Good field of view is clearer 3.
Visibility 10-20 km Visibility is generally 4.
Visibility 5-15 km Visibility is poorer Visual field is not clear 5.
Visibility 1-10 km Light fog visibility difference Visual field is not clear 6.
Visibility 0.
3-1 km Fog visibility is very poor 7.
Visibility is less than 0.
3 km Heavy fog visibility is very poor 8.
Visibility is less than 0.
1 km Thick fog visibility is very poor