From measuring wind speed at a remote weather station to providing the storm proximity data required under IEC 62305, professional meteorological sensors underpin safety, operations and compliance across dozens of industries. Here’s what you need to know.
Professional meteorological sensors are the unsung backbone of modern safety-critical operations. Whether you’re managing a commercial airport, an offshore platform, a wind farm, a golf course or an industrial site, the decisions you make in response to weather and the warnings you can give are only as good as the sensor data behind them.
This guide covers the main types of meteorological sensor, their operating principles, the industries that rely on them most and the increasingly important role they play in supporting compliance with IEC 62305, the international standard for lightning protection and risk assessment.What Are Meteorological Sensors?
A meteorological sensor is any instrument designed to measure one or more atmospheric or weather variables to a defined level of accuracy and reliability. In a professional context, as opposed to consumer weather stations, these instruments are expected to perform continuously, often without human intervention, in harsh outdoor environments and to produce data that meets recognised standards such as those set by the World Meteorological Organisation (WMO).
The term covers a broad family of instruments. A single meteorological monitoring installation might include sensors for wind speed, wind direction, temperature, humidity, atmospheric pressure, precipitation, visibility, cloud height, present weather conditions and lightning or thunderstorm activity.
Each parameter is measured by a different sensor type, though compact weather stations increasingly combine multiple measurements into a single unit.
In safety-critical applications, the value of a meteorological sensor is not the data it produces on a calm, sunny day – it is the warning it gives, reliably and automatically, when conditions deteriorate.
Types of Meteorological Sensors
Below is a summary of the principal sensor categories and their measurement principles. Senseca UK manufactures and distributes instruments across all of these categories.
| Sensor Type | What It Measures | Key Principle | Typical Applications |
|---|---|---|---|
| Anemometer | Wind speed and direction | Cup rotation (mechanical) or ultrasonic pulse travel time | Aviation, wind energy, offshore, roads |
| Visibility Sensor | Meteorological optical range (MOR) | Forward scatter of a light beam through the atmosphere | Airports (RVR), motorways, tunnels, harbours |
| Thunder / Storm Detector | Lightning activity, storm proximity and bearing | Electromagnetic pulse detection and electric field measurement | Airports, golf courses, offshore, events, mining |
| Present Weather Sensor | Weather type (rain, snow, fog, hail, etc.) | Optical disdrometer and forward scatter combined | Aviation METAR, transport, general meteorology |
| Ceilometer / Cloud Height | Cloud base height and vertical visibility | Laser pulse time-of-flight (LiDAR) | Airports, heliports, meteorological networks |
| Precipitation Sensor | Rain rate, accumulation, snow, hail | Tipping bucket gauge or optical disdrometer | Hydrology, roads, agriculture, general met |
| Temp / Humidity / Pressure | Air temperature, relative humidity, barometric pressure | Capacitive and resistive sensing | Weather stations, HVAC, process control |
| Ambient Light Sensor | Illuminance (lux) and luminance | Photodiode response | Street lighting, building automation, aviation |
| Compact Weather Station | Multiple parameters in one unit | Combined sensor array | Remote sites, marine, general met networks |
Mechanical vs. Ultrasonic Anemometers
Traditional cup anemometers and wind vanes are the most widely recognised meteorological sensors but they have moving parts that require maintenance and can be affected by icing.
Ultrasonic anemometers – which measure wind speed and direction by analysing the travel time of sound pulses between transducers – are increasingly preferred in demanding environments where reliability and low maintenance are paramount.
Forward-Scatter Visibility Sensors
Visibility is critical in aviation, road transport and maritime operations. Forward-scatter visibility sensors work by projecting a focused light beam across a short sample path and measuring the intensity of light scattered forward by particles (water droplets, snow, dust) in the atmosphere. The degree of scatter is used to calculate the meteorological optical range (MOR) effectively, how far a pilot or driver could see.
Thunder Detectors and Storm Detectors: A Special Case
Among all meteorological sensors, thunder detectors and storm detectors occupy a unique position, because their primary function is not to describe atmospheric conditions but to trigger protective action before a dangerous event – a lightning strike – occurs.
Modern storm detectors work by monitoring the electromagnetic pulses (sferics) produced by lightning discharge, as well as the changes in the local atmospheric electric field that precede a thunderstorm. This allows them to provide warning not just when lightning is striking, but when conditions are developing that make a strike increasingly likely – critical for venues or operations where evacuation or safe-work suspension requires advance notice.
The BTD-200 is a short-range thunder detector with 35 km omnidirectional coverage, widely used for site and venue protection – golf courses, sports stadia, construction sites, leisure facilities. The BTD-300 is a long-range storm detector with 83 km range and directional bearing output, suited to airports, offshore platforms, industrial sites and any application requiring maximum advance warning time.
Key Applications for Professional Meteorological Sensors
Aviation
Airports are among the most demanding environments for meteorological sensors. Aviation ground operations require continuous, certified measurement of visibility (for Runway Visual Range), cloud height, wind speed and direction, precipitation type, present weather, and temperature/pressure.
In addition, storm detectors are used to protect ground crews during aircraft refuelling and other ramp operations. Senseca UK sensors are in service at airports across the world, operating as part of METAR reporting and aviation safety systems.
Wind Energy
Accurate wind measurement is foundational to both wind farm site assessment and day-to-day operation. Ultrasonic anemometers are often preferred at hub height for their robustness in harsh, exposed conditions. Visibility sensors are used to activate turbine obstruction lighting in low-visibility conditions – a regulatory requirement in many jurisdictions. Storm detectors protect maintenance personnel working on turbines.
Roads and Transport
Road weather information systems (RWIS) use a combination of visibility sensors, precipitation gauges, temperature sensors and wind monitors to provide data that triggers variable message signs, speed restrictions and gritting decisions. In tunnels, road sensors must also cope with vehicle pollution and airflow. Senseca UK sensors are deployed in national road networks in the UK and internationally.
Offshore and Marine
Offshore platforms, vessel bridges and port operations rely on meteorological sensors for operational safety decisions – from helicopter landing clearance to crane suspension and safe crew transfer. Marine-rated sensors must withstand salt spray, humidity and constant vibration while maintaining calibration and data continuity.
Sports and Leisure
Golf courses, cricket grounds, athletics tracks and outdoor events venues use storm detectors to comply with duty-of-care obligations under health and safety law. The BTD-200 is specifically designed for this market – simple to install, with clear alarm outputs that trigger PA systems, warning horns, or illuminated signs to clear spectators and players from the course or field.
Meteorological Sensors and IEC 62305: What You Need to Know
IEC 62305 (and its UK equivalent, BS EN 62305) is the international standard for lightning protection. It is structured in four parts, covering general principles, risk management, physical protection of structures, and protection of electrical and electronic systems. The standard is referenced in UK building regulations, health and safety guidance, and sector-specific codes of practice for industries including oil and gas, aviation, construction and events.
Meteorological sensors, particularly storm detectors, are relevant to IEC 62305 in two important ways.
Risk AssessmentGround Flash Density Data (Ng) IEC 62305-2 requires that a lightning risk assessment be carried out for any structure or installation before a lightning protection system is designed.
A central input to this risk assessment is Ng – the average ground flash density for the location, expressed as the number of lightning flashes per square kilometre per year. While Ng data is available from national lightning detection networks, sites that require very precise, local data – or that operate in remote locations – may deploy a storm detector to build up their own ground truth dataset. The BTD-300’s data logging capability makes it well suited to this purpose.
Operational Protective Measures: Warning Systems
IEC 62305 does not only address physical protection of buildings and structures. For facilities where personnel are exposed during outdoor operations, the standard and its supporting guidance recognise that warning systems and operational protective measures are a legitimate and necessary part of the overall lightning protection regime.
In practical terms, this means that a site operator – whether running an airport, a golf course, a wind farm or a chemical plant – needs to have a defined procedure for suspending exposed work and moving personnel to safety when a storm approaches. A thunder detector or storm detector is the instrument that triggers this procedure automatically, reliably and without requiring human judgement in the moment.
IEC 62305 treats warning systems not as an optional add-on but as a core element of operational lightning protection – particularly for sites where physical shielding of personnel is impractical.
UK Adoption: BS EN 62305
The UK has adopted IEC 62305 as BS EN 62305, with no significant technical deviations. UK organisations seeking to demonstrate compliance – whether for insurance purposes, Health & Safety Executive (HSE) requirements, or sector-specific regulation – should work to the BS EN 62305 framework. Senseca UK application engineers can provide guidance on how our storm detectors support your site-specific compliance documentation.
IEC 62305 Quick Reference
Part 1 – General Principles: Scope, definitions, fundamental requirements for lightning protection systems.
Part 2 – Risk Management: Methodology for assessing lightning risk and determining appropriate protection level (LPL I–IV). Requires Ng data.
Part 3 – Physical Damage to Structures: Air termination systems, down conductors, earthing – the “lightning conductor” part of the standard.
Part 4 – Electrical & Electronic Systems: Surge protection devices (SPDs) to protect equipment from lightning-induced transients.
Choosing the Right Meteorological Sensor for Your Application
There is no universal answer to the question of which meteorological sensors a site needs, it depends entirely on the hazards you are managing, the operational decisions the data needs to support, and the standards or regulations you must comply with.
As a general framework, the following questions help define the sensor requirement:
What weather parameters create risk or operational impact at your site? A coastal oil platform has very different priorities from an inland golf course – the former needs wind, visibility and storm monitoring; the latter needs storm detection first and foremost.
What data quality and certification do you need? Aviation applications require certified instruments meeting ICAO and WMO specifications. General industry applications may have more flexibility, but insurance and regulatory compliance often demands traceable, calibrated data.
What are the integration requirements? Modern meteorological sensors output data via a range of protocols – RS-232, RS-485, SDI-12, Modbus, NMEA, and increasingly Ethernet and wireless. Integrating sensor data with SCADA systems, building management systems, or alarm infrastructure is a key design consideration.
What are the maintenance and lifetime support requirements? For remote or offshore installations, sensor reliability and the availability of long-term support matter greatly. Senseca UK provides lifetime product support on all instruments, including those originally sold under the Biral brand.
Speak to a Meteorological Sensor Specialist
Senseca UK – formerly Biral – has been designing, manufacturing and distributing professional meteorological sensors for over 25 years. Whether you need a thunder detector for a golf course, a full meteorological monitoring system for an airport, or guidance on IEC 62305 compliance for an industrial site, our team can help.