How a professional sweep works, step by step

Every engagement begins away from the site. We build the risk profile: who would have motive and access, which conversations would be valuable, which rooms and devices matter most. We set time windows that draw no attention and a discreet entry plan.

This phase prevents waste and false negatives. A sweep run without context finds less, because it does not know what to look for or where a threat would most plausibly sit.

Many listening devices transmit. We map the electromagnetic environment with spectrum analyzers such as the Rohde & Schwarz FSH8 and the Aaronia SPECTRAN V6 paired with RTSA-Suite PRO, capturing signals in real time and comparing them against an expected baseline for the location.

Modern transmitters hide: they hop frequencies, transmit in short bursts, mimic Wi-Fi. That is why we use wideband capture and, when needed, direction finding with the Aaronia IsoLOG 3D DF to point to the physical source of a suspicious emission.

Not every threat emits a signal during the sweep. Recorders that only store, dormant cameras and deactivated implants do not show up in the spectrum. For these we use the REI ORION 2.4 HX non-linear junction detector, which responds to the electronics themselves, powered or not, hidden in walls, furniture or objects.

We complement this with a FLIR thermal camera, which reveals heat from circuits operating behind surfaces, and with line and telephony inspection via the REI TALAN 3.0, which detects taps and anomalies in cabling and outlets.

No equipment replaces trained eyes. When authorized, we open outlets, light fixtures, smoke detectors, frames, electronic giveaways and recent gifts. Objects nobody questions are precisely the best hiding places.

Physical inspection also covers the overlooked obvious: one extra charger, a sensor that does not belong to the house system, a cable that leads nowhere. Much of what is truly found is in plain sight of someone who knows how to look.

At the end you receive a confidential report describing what was done, what was found and what we recommend. If a crime is indicated, we preserve the scene and can consolidate a technical or forensic report with evidentiary value, always within data-protection law.

The sweep does not end at diagnosis. We deliver a hardening plan: architectural fixes, access control, routines and, where it makes sense, a cadence of reassessments. The goal is for the environment to stay clean after we leave.