Fully integrated standalone thunderstorm warning system
July 2026Sensors & Transducers
Analytical Instrumentation & Environmental Monitoring
A fully integrated thunderstorm warning system can reduce the enormous damage that lightning, high winds, hail and flash floods do to commercial, residential and sports properties, municipal and private infrastructure. The costs of subsequent clean-up and repair operations are costly and often unbudgeted for. Senseca has introduced its BTD-1 fully integrated, standalone thunderstorm warning system, specifically designed to detect the presence and range of lightning flashes by monitoring the background quasi-electrostatic field.
“Measurement is knowledge, and the more data captured in advance of these often devastating thunderstorms across South and southern Africa, the more proactive emergency preparedness can be implemented, saving lives, infrastructure, equipment and property. Senseca’s BTD-1 system overcomes existing limitations of systems such as Lightning Location Networks, single radio sensors and Electric Field Mills,” says Jan Grobler, managing director of Senseca South Africa.
“The BTD-1 is able to overcome these shortcomings due to its proprietary technique that analyses variations in the electric field within the 1-50 Hz band. This approach enables a much wider detection range, up to 83 km, the ability to detect even weak lightning, and, most importantly, the capability to generate alerts before the first lightning strike by sensing electrical charges in the air and in raindrops. The system is robust, has no moving parts and is designed to operate in harsh environments,” says Grobler.
During a thunderstorm, a separation of electric charges forms inside the cloud, creating an electric field between the cloud and the ground. When a lightning strike occurs, part of this charge is neutralised, causing a rapid change in the electric field. The BTD-1 continuously measures these variations, detecting lightning in an indirect, but highly effective, way. By relying on the electric field, the BTD-1 can detect all types of lightning, including weaker discharges and those occurring within the cloud.
Features of the BTD-1
• Advanced warning: Provides warning of an overhead thunderstorm before the first lightning strike.
• Severe storm feature: Highlights storm cells with increased risk of large hailstones.
• Best-in-class detection efficiency: Detects storms earlier with a very low false alarm rate and reduced interference from man-made sources.
• Up to 83 km range: Extended detection capability for early warning.
• GPS/GNSS timing: An integrated GPS/GNSS supports highly accurate flash timing and UTC-based time reference.
• Plug-and-play modularity: Easy installation with optional accessories and integration modules.
The BTD-1 should be installed in an open area, away from obstacles with proper earthing. Nearby electrical interference, such as that from transformers, should be avoided, and the recommended installation height is important to maintain.
The BTD-1 assists industries and facilities that need to comply with health, safety and risk management standards, including airports, schools, sports facilities, golf clubs and courses, municipal and commercial swimming pools, marine and harbour facilities, and construction sites.
‘At Senseca, we believe that the BTD-1 due to its accuracy and extensive range capability, will raise the bar in the supply of advanced technology for early warning electric field and lightning detection,” concludes Grobler.
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