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                          • Products
                            • Industrial Measurements
                              • Products by parameter
                                • Humidity (for normal or wet conditions)
                                • Liquid Concentration
                                • Carbon Dioxide CO₂
                                • Dew Point (for dry conditions)
                                • DGA in Power Transformer Oil
                                • Methane CH₄
                                • Hydrogen Peroxide H₂O₂
                                • Hydrogen H₂
                                • Moisture in Oil (MiO)
                                • Pressure
                                • Structural Moisture
                                • Temperature
                              • Products by category
                                • HVAC & Indoor air
                                • Handhelds
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                                • Polaris process refractometers
                                • Power transformer monitoring
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                                • Probes & OEM modules
                                • Indoor Environmental Monitoring
                                • Quick links:
                                  • Catalogs
                                  • Indigo Family
                            • Weather and Environmental Solutions
                              • What are you measuring?
                                • Air quality
                                • Cloud height
                                • Lightning
                                • Multi-weather
                                • Precipitation
                                • Pressure
                                • Road & runway surface condition
                                • Temperature & humidity
                                • Visibility & present weather
                                • Wind
                              • What is your challenge?
                                • Air quality monitoring
                                • Airport weather
                                • Atmospheric research
                                • Automotive weather data
                                • Drone flight safety
                                • Helideck monitoring
                                • Lightning detection
                                • Maritime weather
                                • Meteorological infrastructure & capability development
                                • Observation network management
                                • Offshore environmental monitoring (EMS)
                                • Ports & coastal weather
                                • Road asset management
                                • Ship instrumentation
                                • Winter road maintenance
                              • Explore products:
                                • Automatic weather stations
                                • Radiosondes & sounding systems
                                • Weather & environmental sensors
                                • Weather radars
                                • Wind lidars
                              • Explore digital & data solutions for:
                                • Automotive weather data
                                • Aviation
                                • Lightning
                                • Renewable energy
                                • Road asset management
                                • Winter road maintenance
                          • Services
                            • Services
                              • Calibration and repair services
                              • Maintenance and upgrade services
                              • Technical support
                              • Continuous monitoring system services
                              • Project services
                              • Remote and digital services
                              • Training services
                              • Lifecycle agreements for weather applications
                              • Vaisala K-PATENTS® Process Refractometer Services
                          • Industries & Applications
                            • Industrial Measurement Solutions
                              • By industry
                                • Automotive
                                • Battery Manufacturing
                                • Biogas
                                • Chemical industry solutions
                                • Cleanrooms
                                • Compressed Air
                                • Data Centers
                                • Food, Beverage & Agriculture
                                • Fuel Cells
                                • HVAC & Indoor Air
                                • Life Science & Pharmaceutical
                                • Power Industry Solutions
                                • Pulp, paper and wood
                                • Semiconductor
                                • ALL INDUSTRIES
                              • By measurement
                                • Carbon Dioxide
                                • Dissolved Gas in Oil (DGA)
                                • Humidity and Dew Point
                                • Hydrogen Peroxide
                                • Hydrogen
                                • Liquid Concentration
                                • Methane
                                • Moisture in Oil (MiO)
                                • Pressure
                                • Temperature
                              • By technology
                                • CARBOCAP®
                                • DRYCAP®
                                • HUMICAP®
                                • PEROXCAP®
                                • BAROCAP®
                            • Weather and Environmental Solutions
                              • Aviation
                              • Defense Meteorology
                              • Roads
                              • Maritime
                              • Meteorology
                              • Renewable energy
                              • Urban & industrial systems
                          • News & insights
                            • What's up?
                              • News and events
                                • Press and stock exchange releases
                                • Blogs and reference cases
                                • Events and Webinars
                                • Recommended webinars
                                • Expert articles
                                • eBook Collection
                                • Vaisala on social media
                              • Top stories
                                • New R&D and innovation center
                                • Our technology on Mars
                                • Annual report 2022
                          • Contact Us
                            • Contact Sales
                              • Contact Us Form
                              • Find your local contact
                            • Customer Support
                              • Contact HelpDesk
                              • Make a warranty claim
                            • Media & Investor Contacts
                              • Media and PR Contacts
                              • IR Contacts
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                              • Office Locations
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                              • Give Feedback
                          • About Vaisala
                            • Vaisala as a company
                              • Vaisala in brief
                              • Values
                              • History
                              • Megatrends
                            • Business
                              • Businesses and customers
                              • Strategy
                              • Sourcing and suppliers
                              • Quality, environment, health and safety
                              • Code of conduct
                            • Innovation and R&D
                              • Technologies
                              • Cleanroom
                              • R&D and innovation center
                              • Collaboration with scientific community
                            • Sustainability
                              • UN Sustainable Development Goals
                              • Environmental sustainability
                              • Social sustainability
                            • Management
                              • Board of Directors
                              • Leadership Team
                          • Investors
                            • Vaisala as an investment
                              • Why invest in Vaisala?
                              • Strategy and long term financial targets
                              • Market information
                              • Acquisitions and divestments
                              • Risk management
                            • IR calendar
                            • Financial information
                              • Annual and quarterly figures
                              • Financial reporting structure
                              • Accounting principles for the consolidated financial statements
                              • Calculation of key figures
                            • Reports and presentations
                            • Corporate governance
                              • Governing bodies of Vaisala
                              • Corporate Governance Statement
                              • General Meetings
                              • Board of Directors
                              • Leadership Team
                              • Remuneration
                              • Insiders
                              • Controls
                              • Auditing and auditor's fees
                              • Articles of Association
                            • Shares and shareholders
                              • Basic share information
                              • Share monitor
                              • Key share figures
                              • Share capital
                              • Dividend
                            • Investor relations
                              • Disclosure Policy
                              • Share register and changes of address
                              • Subscribe to releases and publications
                          • Media
                            • For media
                              • Press and stock exchange releases
                              • Blogs and reference cases
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                              • 10 reasons to join Vaisala
                              • Developing Our People
                              • Well-being
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                              • Meet some of us
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                              • Open jobs
                              • For software developers
                              • For applicants in the US
                              • For Students
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                          1. Home
                          2. Products
                          3. Weather & Environmental Sensors
                          4. Visibility & Present Weather Sensors

                          Visibility & Present Weather Sensors

                          Trust Vaisala for the most accurate measurements of weather parameters and visibility data for weather forecasting that ensures safety and operational efficiency.

                          Explore Sensors

                          Present Weather Detectors and Visibility Sensors PWD Series

                          Accurate and flexible, choose the right weather and visibility sensor for maritime, transportation, planning, and general forecasting use — at the right price.

                          LEARN MORE

                          Forward Scatter Sensor FD70

                          Make the best decisions with the best forward scatter technology on the market, specifically designed for precise present weather reporting.

                          LEARN MORE

                          Visibility & Present Weather Sensors FS11 & FS11P

                          Accurate weather observation data for runway visual range, aeronautical, and synoptical applications.

                          LEARN MORE

                          Transmissometer LT31

                          The world’s most accurate measurement instrument for runway visual range, this transmissometer provides the best visibility data for aviation safety.

                          LEARN MORE

                          Background Luminance Sensor LM21

                          Fully featured, stand-alone ambient light sensor for Runway Visual Range (RVR) applications.

                          LEARN MORE
                          Vaisala team collaborating in office

                          Make Informed Decisions with Confidence

                          Contact us and learn how to dramatically improve visibility and present weather awareness with Vaisala's trusted technology.

                          CONTACT US

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