TORNADOLERT - recommended for homes, trailers, apts, schools, nursing homes, cars, RVs, trucks and tornado shelters. Faster and more reliable tornado warnings. VIDEO of operation in homes and cars.
Tornadolert detects (low-frequency) infrasound emitted by approaching tornados. Infrasound, which is unheard by humans, travels without loss, even through solid walls.
A new tornado warning system under test by NOAA (US National Oceanic & Atmospheric Administration) is based on detecting tornado infrasound.
Other marketed sensors detect lightning, not tornados. However, only 10% of lightning-storms produce tornados.
Tornado-Warn Home detects 99.99% of tornado threats in homes, apartments, mobile homes and tornado shelters. Its back-up-battery powers operation in un-powered shelters
Tornado-Warn Car is alone in detecting tornados in moving cars and trucks.