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Intruding low-flying UAS are no longer a marginal risk for critical infrastructure. Conventional sensors often miss small drones at low altitude, and poor visibility can turn radar or optical coverage into a patchwork of blind spots. RIBRI answers that gap with Heimdall, a passive acoustic C-UAS sensing solution built to listen first and alert fast.Part of the RIBRI Hearing product line, Heimdall detects unauthorised drones by capturing their distinctive acoustic signatures rather than relying solely on radar, RF, or visual tracking. Because it "hears" the target, it performs in conditions that routinely defeat other sensors—darkness, fog, and rain—while keeping the false-alarm burden low. By adding an acoustic layer to a multi-sensor security stack, Heimdall gives operators a clearer, earlier picture of airborne threats.

For years, projecting a clear warning across open water or a busy quay meant bolting together a speaker, a spotlight, a surveillance camera and a pan-tilt mount — four separate rigs, four power runs, four points of failure. RH20Y ends that juggling act. RH20Y is RIBRI's multifunctional integrated Long range acoustic hailing device, extending the Voice (Acoustic Hailing) line with built-in optics. One IP65 housing combines a high-intensity sound module, a 5 W green laser and LED searchlight, a 4 MP 32× zoom camera and a servo pan-tilt head — engineered to military-grade MIL-STD-810H standards for long-range alerts, area surveillance and emergency command in any weather.

RIBRI has expanded its Voice product line with the RP21C-A, a portable directional acoustic device designed to keep operators out of harm's way while still being heard clearly over long distances. Engineered for rapid field deployment, the mid-size unit combines a directional acoustic projector, remote operation, and an all-in-one housing into a single, mission-ready package.

When the noise wins, the message loses. In search-and-rescue, law enforcement, maritime, and border missions, engine roar and wind drown out radios and loudspeakers — and a missed order becomes a missed response. RIBRI built the RP11C for exactly that moment.