Fingerprints or other smudges on the sensor glass can impede its ability to count accurately.

To clean your sensor, we recommend using isopropyl alcohol and a lint free microfiber cloth. Apply isopropyl alcohol liberally to a microfiber cloth and gently wipe down the glass lens on the sensor.

The sensor is typically a bit warmer than room temperature, but at certain times can reach as high as 135ºF (57ºC) when it is doing a lot of processing or when the ambient environment is especially warm, (80ºF+). Normal operating temperature is between 115ºF – 125ºF (46ºC – 52ºC), which falls within industry and certification standards.

Density sensors are in compliance with industry requirements around temperature for their use-case. For devices that are fixed or mounted use, the exterior surface temperature limit is 140ºF (60ºC). We routinely test our devices for compliance using a FLIR (Forward-Looking Infrared) camera and thermocouples to ensure they never reach the temperature limit under multiple test scenarios.

I have to move my device, is it safe to touch?

The device is safe to touch, even after its powered and operational, but may be uncomfortable to hold for an extended period of time. If you need to move the device after it’s been online, we recommend unplugging the device and waiting a few minutes to cool down, or wearing gloves so it’s more comfortable to hold the device for an extended period.

What can I do to avoid the device becoming too hot?

• Remove the plastic protector over the vent on the back of the device to ensure proper airflow.
• Make sure the unit has sufficient clearance, per the installation documentation.
• Units should not be operated for an extended period while sitting face down on a surface. If the unit is under heavy load for initial power on or testing and left sitting on a surface (not mounted above a doorway), temperatures will rise as airflow is restricted.
• Deploy Density in an indoor, temperature-controlled environment.

Density sensors employ a small DC (direct current) fan that emits less than 30 dB of noise while in operation. 30 dB is the typical noise level of a library and is even lower than most desktop computers. However, because of the speed at which this fan spins while operating, it emits a sound at a frequency that can be perceptible in quiet areas, such as conference rooms where no one else is speaking.

This is the typical operation of the product and is no cause for concern. However, if there are other noises associated with this fan that are not associated with a consistent hum and seem more sporadic and varying in pitch, it can possibly be an issue needing attention. Please consult directly with your Density representative if you have any concerns regarding the fan.

The Density sensor uses infrared lasers to accurately count humans entering and exiting the doorway where it is installed. Every second, the lasers generate tens of thousands of accurate depth measurements. The device then applies machine learning algorithms—developed by Density specifically to pinpoint human movement—-to process these measurements in real time. The device sends count data—+1 for an entrance, -1 for an exit—to Density’s cloud service, where it’s then available via Dashboard and API.

Each sensor is Bluetooth enabled, although this connection is only used to provision and configure the device as well as remotely connect to the device for basic troubleshooting. If desired, the Bluetooth connection can be disabled at the device level.

The white LED light on the front of the unit indicates the unit is powered on. If you don’t see a white LED on, please check the power your power source.

If you don’t have a PoE+-enabled switches, with any Cat5 (or Cat6) ethernet cable and a power adapter (PoE+ injector) you can simply plug the devices into a wall outlet. In other words, you do not need to connect a Density sensor to a network switch in order to get power. Any outlet will do.

All power is provided over a standard cat 5e/cat6 cable to an RJ45 jack on the back of the Density unit. You have the option of using a standard 120-240V outlet for power or getting power from a port on a PoE+ (“PoE plus”) rated switch. Most of our customers deploy Density devices on their existing IT infrastructure as they can both power and data over one cable.

Density sensors run custom embedded Linux. The userland is Busybox. Density sensors are shipped from our warehouse with the latest firmware and OS configurations already loaded onto the device and contain no factory default passwords to ensure high data security standards.

Yes, Density enables data encryption by default with no extra configuration required.

• At rest: HTTPS/TLS 1.2
• In transit: AES-256 encryption

Density stores encryption keys in a secure Key Management System on a separate network with limited access and auditing. Keys and other secrets are never stored on the local filesystem, but are delivered at process start time and retained only in memory while in use.

The device makes only outbound connections to our secure cloud service via Port 443. By default, Density encrypts data in transit and at rest.

For purposes of people-counting to measure how spaces are utilized, cameras are inaccurate and invasive. Unlike a camera, Density’s device does not have an optical sensor for visual light, which means that—unlike a camera—it’s incapable of producing a picture with visual details that can be attributed to any one individual.

From a software perspective, cameras are designed specifically for physical security use cases. This means that there is no security camera software—or video management system (VMS)—designed for workplace-related use cases. If you are in workplace strategy, building operations, corporate real estate or a related field—and you care about system accuracy and occupant privacy—then Density is a likely a great fit for your use case.

Cameras aren’t as accurate as the technology that we’ve developed. Also, we believe that cameras infringe on the privacy of building occupants, employees, customers and others.

We’ve spoken to hundreds of professionals in corporate real estate and workplace operations who say that mass deployments of cameras would be negatively received by their employees and visitors. There’s also a large amount of research suggesting that cameras fundamentally change people’s behavior, which prevents you from accurately tracking how space is utilized. As soon as someone is aware they’re under surveillance, they change their behavior.

The device doesn’t “see” anything. Our device is not a camera and does not capture any personally identifiable information (PII).

What it does capture is depth data that is processed in real time on the device to accurately count humans entering and exiting a space through an entryway/doorway. Density’s technology is fully GDPR compliant.