01PRESENCE OUTPUT
Lighting
Room-to-room movement, patrol patterns, and context-aware illumination.
AI-Simulated Presence Security
Security that acts before entry.
Sentra coordinates lighting, sound, vibration, and visual cues to make protected spaces appear intelligently occupied, actively aware, and prepared to respond.
Patent-pendingLayered system architecture
Prototype activeReal-world demonstration build
Montana builtCommercial + public-sector focus
Most security systems document what happened.
Sentra is engineered to influence whether it happens at all.
One coordinated presence
Not isolated triggers.
A believable response.
Sentra’s orchestration layer interprets context, selects a presence strategy, and coordinates existing devices as a unified environment.
02PRESENCE OUTPUT
Audio
Footsteps, voices, guard activity, K9 cues, and environmental movement.
03PRESENCE OUTPUT
Vibration
Low-frequency structural resonance that can be felt as well as heard.
04PRESENCE OUTPUT
Visual Presence
Shadows, silhouettes, and movement cues that reinforce believable occupancy.
Presence Response
One decisive action.
A layered response.
From a camera view or simple control, a user can activate a coordinated presence sequence across the property. Lights move. Audio begins. The space responds as one.
Request a demonstration →PROPERTY 01● PRESENCE READY
SIDE YARD · LIVE
PERSON DETECTEDLINGERING · 00:18
01 LIGHT02 AUDIO03 VIBRATION04 CONTINUITY
Designed to scale
Presence where it creates an advantage.
From a single room to distributed facilities, Sentra integrates with existing infrastructure rather than replacing it.
01
Homes + vulnerable-person safety
↗02
Commercial properties + vacant spaces
↗03
Critical infrastructure + utilities
↗04
Remote facilities + high-value assets
↗05
Vehicles, cargo + mobile environments
↗06
Government, defense + force protection
↗Presence with a purpose
Helping vulnerable women feel less alone.
Sentra’s mission is deeply personal to David and Crystal Hall. Through their work with women and families facing trauma, instability, and domestic-violence-related safety concerns, they have seen how frightening it can be to feel watched, targeted, or vulnerable at home.
Crystal’s lived experience as a survivor helps keep this work grounded in dignity, practical safety, and the realities women face. Together, David and Crystal are helping shape Sentra Presence Response as a nonviolent, preventative option that can create the believable impression that a woman is not alone when a threatening person is lingering nearby.
“At Sentra, we envision a world where no one feels vulnerable alone.”
Property interest
Could you use Sentra on your property?
Tell us what you protect and how you would use simulated presence. Your response helps us select pilot locations, prioritize integrations, and understand real demand.
01Property ownersHomes, rentals, remote properties, and vehicles
02OrganizationsCommercial, nonprofit, government, and critical assets
03Early adoptersPilot participation, demonstrations, and future orders
Built from the field
Real-world systems experience. A new security category.
David Hall founded Sentra after more than 20 years working with electrical systems, automation, security, and the infrastructure people depend on every day.
That field experience led to a simple insight: the strongest security event may be the one that never begins. Sentra is being built to give homes, organizations, and critical assets a believable presence when no one can physically be there.
David HallFounder & Inventor · Sentra LLC
Pilot partners sought
Help build the intelligent presence layer for the future of security.
Sentra is seeking pilot sites, strategic advisors, research collaborators, security integration partners, and licensing conversations.