Hospitals commonly keep bulk oxygen in a fenced outdoor enclosure close to the building it feeds. On an ordinary night the fence keeps people out. On September 3 in Aurora, Colorado, it did not, and nothing on the enclosure itself reported the visit.
What Actually Happened
In the early hours of September 3, someone reached the outdoor oxygen storage area at UCHealth University of Colorado Hospital, the state’s largest hospital with 831 beds. According to the police report released by the CU Anschutz Police Department, security video shows a person appearing near the enclosure, climbing its fence a few minutes later at about 1:16 a.m., turning off the oxygen supply and climbing back out. The security supervisor told police the person was in and out in about 30 seconds.
Pressure in a hospital oxygen system falls gradually. Nurses followed their low-pressure protocols and moved patients onto backup oxygen, and the facilities team switched the hospital to its backup source before turning the main supply back on. UCHealth says no patients were harmed. Police say they have identified a suspect, and the hospital says it is strengthening protections around its critical infrastructure.
The Detection Gap
The security team learned about the tampering when a hospital supervisor reported that oxygen was “down to zero” and asked whether anyone had touched it. The team then reviewed the video and found the climb. The responding officer asked why police were notified almost two hours after the incident.
The camera gave investigators a timeline and a rough description, which is what verification is for. What did not happen at 1:16 a.m. was an alarm from the enclosure itself, the kind that fires when a person stands where nobody should be at 1 a.m. Camera analytics can be set up to do some of that work, but their results depend on lighting, angle, distance and tuning, and the officer noted the video quality was too low to determine even the person’s gender. So the first working alarm in this sequence was the oxygen system’s pressure alarm, which reports the consequence after it happens.
How PulseVi Addresses This
PulseVi is a 3D solid-state LiDAR sensor. It measures distance with its own eye-safe laser pulses, so it works in complete darkness. For a small, high-value enclosure such as a medical gas yard, it would use the gate and access point layout: an approach zone on the ground outside the enclosure fence and a threshold zone along the fence line.
Applied to this sequence, the first alarm would come when the sensor classified a person inside the approach zone, during the minutes between their appearance near the enclosure and the climb. The second would come at about 1:16 a.m., when the person crossed the threshold zone going over the fence. Each alarm carries a location. Through a VMS or Vidalert, it can call up the camera already aimed at the enclosure, so an operator sees the person while they are still there. PulseVi classifies people and vehicles by size, speed and direction, which keeps animals and blowing debris out of an alarm queue that someone watches at 1 a.m.
A 30-second act inside the fence will not be stopped by a sensor alone. The alarm changes the order of events: security knows someone is at the oxygen yard before the pressure starts to fall, and facilities can check the valves right away instead of working backward from a low-pressure alarm. The sensor also needs a clear line of sight to both zones, a rigid mount and commissioning against the real conditions at the site.
What Facility Owners Should Ask
Which of our utility enclosures, including medical gas, generators, fuel and electrical rooms, would tell us within seconds that a person is at the fence or inside it?
Is our first alert on these assets a security alarm, or a process alarm that reports the damage after it happens?
Are the cameras on these enclosures tied to an alarm that calls them up, or are they reviewed afterward?
Who receives an enclosure alarm at 1 a.m., and what are they expected to do in the first minute?
The Bottom Line
The staff and backup systems at UCHealth did what they were built to do, and patients stayed safe. The gap sat upstream of them: the enclosure had a fence and a camera, neither raised an alarm, and the first signal came from the oxygen itself. A PulseVi approach zone around that fence puts the alert where the event starts. To talk through an enclosure layout for your site, contact RBtec.
