Social Distancing Management
in the Workplace

How can companies resume operation and practice safe social distancing?

InvisiShield technology is the contemporary social distancing solution for keeping employees in safe working zones.
It works to protect employees from COVID-19 exposure and keeps businesses operational.

Places InvisiShield can be used



Medical Centers


InvisiShield: Wearable Social Distancing Device

The Suntsu InvisiShield is a small electronic device slightly smaller than a smartphone. It acts as a social distancing tracker – when another InvisiShield comes too close, it gives an alert. The immediate signal allows wearers to increase the space between them. The device is powered by a long-lasting, rechargeable lithium-ion battery to provide about 40 hours of operation in nominal operation scenarios.

• InvisiShield, is a wearable social distancing device uniquely combining Bluetooth and UWB technologies for low power and high accuracy operation, respectively.

• UWB (Ultra-Wideband) technology allows straightforward monitoring gatherings of people in the work place.

• The InvisiShield operates at 6.5 GHz with 500 MHz bandwidth at a very low energy level the less crowded wi-fi microwave frequency band, so you can be confident that they remain on and working in real time.

• Certified for use under Federal Communications Commission (FCC) and International Communications (IC) rules, this indoor tracking device does not interfere with other communications.

Simple Infrastructure

Use the device straight from the box.

Precise Measurements

Immediate sensory proximity warnings.

Competitive Pricing

By unique Bluetooth and
UWB combination

InvisiShield 360° View

UWB Technology: Enforcing Social Distancing in the Workplace

Level 1 Alert

The advantage of using UWB technology to encourage safe social distancing is that you monitor the distance
between individuals by their actual position relative to each other.

9.84ft / 3m Level 1 Warning: 1 white warning light, light vibration

Level 2 Alert

Floor markings and human estimates do not account accurately for how people move around a workspace.
InvisiShield provides peace of mind and allows workers to focus on their work without consciously
or sub-consciously monitoring their relative distance from other workers

8.20ft / 2.5m Level 2 Warning: 2 white warning lights, medium vibration

Level 3 Alert

Using a digital solution for social distancing encourages compliance and provides reinforcement and
reminders of social distancing policy at the most significant point of contact. 

6.56ft / 2.0m Level 3 Warning: 3 white warning lights, 1 blue warning light, heavy vibration

Level 4 Alert

4.92ft / 1.5m Level 4 Warning: 4 white warning lights, 1 blue warning light, heavy vibration, beeping

InvisiShield Details

invisishield dims image


Accurancy of
3 inches or better

Support of 32 users
within 100m² area

Haptic Motor Vibration


Super Bright LEDs

Configurable LED Indicator

1400mAh Li-Ion Battery
Charging Via Micro USB

Battery Level Indicator
with 4 LEDs

Accuracy of 3 inches
or Better

The tags distance measurements are highly accurate. You can have more than 32 people in a 100 square meter space and rely on the InvisiShield to give appropriate proximity warning. You can also customize the level of the alert for a range of distances between two tags.

Tag to Tag Ranging

Each tag recognizes another tag without the need for infrastructure to set up a defined area of operation. This feature means that your employees benefit from the tag proximity warning inside your premises and anywhere else they meet another employee wearing the tag.

Size and Weight

The InvisiShield is smaller than a smartphone and light (2.8oz), making them portable and allowing workers to focus on their work. Your employees can attach a lanyard and wear it around their necks or carry it in a pocket for ease of use. Small, lightweight, and discreet to use, the InvisiShield is a practical personal proximity warning system that enables contact tracing at work.

Choice of Alerts

You can customize your InvisiShield for your preferred alert system:
• LED Warning display
• Haptic (vibration) alert
• Audible buzzer
A choice of alert systems means you can choose the best options for workplace safety.
(Contact us for volumn requirement)


A rechargeable lithium-ion battery keeps the InvisiShield operating for up to 24 hours. Recharging is by micro-USB, and 4 LEDs power level display means the user always knows the battery power level. It is straightforward to keep the InvisiShield charged and operating during a complete working shift.

Custom Logo Imprinting Service Available

Why Social Distancing is So Important

How a reduction in social contact can reduce the spread of the coronavirus

Source: Signer Laboratory/Gary Warshaw

How does the UWB Social Distancing Device work?

The technology inside the Suntsu InvisiShield is like some of the technology found inside smartphones.  As a Bluetooth device, it continuously scans other InvisiShields in the area. The low-power Bluetooth is instrumental to achieving the extended battery life. When the InvisiShield finds another tag in the prescribed range, it activates the UWB radio to measure and monitor the two devices’ distance. Both InvisiShields warn their user that they are now too close to each other.  When the InvisiShield finds another tag in the prescribed range, it activates the UWB radio to measure and monitor the two devices’ distance. The different alert mechanisms are customizable as well as the distance detection thresholds. 

Characteristics of UWB Technology

UWB’s accurate distance measurement capability comes from the fact that it uses a much wider bandwidth than WiFi and Bluetooth.  In particular, the Suntsu InvisiShield operates on 500 MHz bandwidth, while typical Bluetooth and WiFi devices run on 1 MHz and 20 MHz, respectively. UWB distance measurement is achieved by sending a highly accurate timing pulse and accurately measuring the response time. This ranging mechanism is completely different from distance measurement devices based on WiFi or Bluetooth.  WiFi or Bluetooth devices use the received signal strength as opposed to the UWB’s timing pulse. As such, the measurement accuracy is highly dependent on any objects in the signal propagation between the two tags. UWB information stays local to the device. You must choose to collect and upload that data to another system to gain access to the report.   

What are the benefits of UWB?

Ultra-wideband (UWB) is one of the best and most reliable ways of defining location and distance and is a component of Apple’s iconic iPhones. Using short radio pulses started in military radar back in 2002, but this useful feature’s applications have grown.

The benefits of UWB in InvisiShields (and other applications are)

• UWB chips are cheap to produce, which results in many affordable devices.
• UWB chips are small, and devices containing them are wearable without discomfort.
• Precision – accurate distance measurement through timed radio pulses.
• Ideal for indoor locations and providing context and data on position and proximity.
• Operates with real-time information without delay as an immediate alert.
• Uses a low amount of power and has minimal impact on a device’s battery life.
• Security – short-range and confined to a local device, with encryption.
• Reliable – no risk of interference or jamming of the signal. It works consistently.
• Energy-saving – it takes very little power to operate short radio pulses.
• Complementary to other technologies like wi-fi and Bluetooth as it uses a different frequency.

Although UWB works at a short-range, that is a plus for a proximity sensor because social distancing is about the nearness of contact.

Frequently Asked Questions

Many InvisiShield systems are available to act as proximity sensors to enforce safe social distancing. We will be discussing the different features and advantages for the following systems:

• Bay Charging
• Distance and Contact Time
• Additional Infrastructure
• Proximity Alarm

Bay Charging

Some systems have smaller square tags that act as social distance alarms, giving the option to be worn on a wristband and a necklace. These smaller devices stay in a bay charging system when not in use. These InvisiShields are not issued directly to individuals but are a communal system where a visitor to a space picks out a tag for their time in the office or warehouse and then replaces it when leaving. The advantage of this type of proximity alarm is that it is small, easy to use, and anonymous. The tags remain on the premises.

• The disadvantages are:
• Limited battery life
• Lack of clear battery level indicator
• The users must have a wristband or lanyard available to hold the device.
• Small and easy to lose.
• No tracing of contacts unless you add in an extra system.
• Easy to use a different tag every day.

The Suntsu InvisiShield is issued on an individual basis to employees.

Distance and Contact Time

Other systems confine themselves to measuring only the distance between two tags and the amount of contact time. This feature restricts the use to the current pandemic social distancing application. The Suntsu InvisiShield is more adaptable to uses, including social distance monitoring and other information gathering like traffic in corridors and other meeting areas to provide planning data for improving the workplace for infection control and workflow.

Additional Infrastructure

Some other systems rely on a network of readers and tags for indoor tracking of individuals. This indoor positioning system involves extensive retrofitting of premises. Suntsu InvisiShields don’t need any readers or door mechanisms because they communicate directly with other tags, and the information collected can be downloaded onto a choice of devices.

Proximity Alarm

Proximity alarm systems vary between hepatic (vibrations), visible (flashing light), and audible (alarm buzzer or noise).

Suntsu InvisiShields offer all three options, set in combinations and ranges appropriate to workplace safety and coworker cohorts.

UWB gives extra precision and accuracy compared to other systems. Now the price of UWB chips decreases in line with increased demand and early adoption by smartphone manufacturers. You can expect to see more applications using the additional value of UWB compared with comparable technologies.

A real-time GPS tracker is an active tracking system that lets you see minute by minute where the tracker uses a GPS tracking service. Anyone who has used the maps on their mobile phone to navigate to a shop or restaurant has experienced GPS tracking. Commercial uses of GPS tracking can show you a location on a map of a vehicle or a person, along with additional information about travel routes, times, speeds, and stops. These systems are useful for fleets of delivery lorries, public transport, and parcel delivery.

5G is a standard technology, often references in phone contracts as the next system after 4G and 3G. What 5G promises are faster connection time and greater capacity with thousands of wi-fi enabled devices in a small area able to communicate. UWB enables devices and users to make maximum use of 5G benefits to applications like proximity sensors, InvisiShields, quick sharing of files between devices, and switching on your smart devices by walking into a room.

Pulse Radio is the old name for Ultra-wideband, referring to the fact that a UWB chip emits high frequency (>500MHz) radio pulses across the whole of its bandwidth. The radio energy emits at specific time intervals or pulses. The continuous stream of pulses provides accurate’ time of flight’ measurements and other benefits that makes UWB excellent at measuring location and speed. Plus, fast and accurate data transfer and connectivity.

A real-time locating system tells you where something is at any time using wireless technologies in the form of badges or tags attached to or embedded in items. The technology enabling tracking can be wi-fi, UWB, RFID, GPS, or Bluetooth, depending on the application. The ability to track and trace objects and people is useful to military, medical, and retail services.

Bluetooth measures signal strength, resulting in errors in location because a weak signal is assumed to be more distant. UWB uses time for a pulse to arrive rather than signal strength. It calculates the distance between two points. NFC is more of a backup system for when other technologies run out of power. No one wants to lose access to their car due to a recharging issue. NFC is Near Field Communication, and it can be passive (no energy required) or active.

Both UWB and spread spectrum technologies originate with military use, but they operate differently. A spread spectrum refers to spreading a signal across a wider bandwidth. It is a covert communication technique and covers various methods, including frequency hopping, direct sequence, and chirp spread spectrums. The benefits include resistance to interference, eavesdropping, and fading. It is useful in RFID tags for tracking inventory (and people) with a reader that collects and correlates the data. Systems using spread spectrum technology are less useful for tag to tag communication with a proximity alarm as it has difficulties with collision control and identifying large numbers. UWB technologies are excellent at identifying individual tag to tag proximity and don’t need a central reader. The UWB approach gives a faster response time to the individual wearing the InvisiShield.

GPS is the Global Positioning System that relies on a satellite network to improve navigation by providing information about location, elevation, and movement. Satellites send unique signals to the earth. GPS enabled devices use the signals from a minimum of four satellites to calculate where it is on the earth’s surface. GPS is excellent outside and has many applications involving navigation and location. Buildings block the satellites’ weak signals, and the system is less accurate for tracking people or items inside buildings. Indoor positioning systems act like GPS but inside a building like a warehouse, office complex, or busy airport. The indoor positioning system can be client-based (individual user – smartphone, for example) or server-based. Client-based options generally involve a smartphone app and strategically located beacons. Server-based systems can use nodes, beacons, and locator tags.

Devices that track and monitor your distance from other people include:

• Mobile phone apps – most people have a mobile phone and are familiar with using apps.
• Repurposed panic alarm systems using beacons and wearable alarms.
• Wearable proximity alarms with or without tracking data.

Mobile phone apps are useful at tracking and monitoring proximity, providing all users download the same app. Current workplace technologies include wearable panic alarms and entrance fobs that can provide proximity information (without an automatic personal alarm) and contact tracing information. Fitness trackers worn on wrists can assist with social distancing. A contract tracing wearable device like Suntsu InvisiShields provides a dedicated tag to trigger alert and tracking systems. It minimizes the data held on employee movements because you only access when necessary. Similar wearable proximity alarms can rely on monitoring through the positioning of beacons or other tracking stations and are limited to specified areas.

Indoor tracking is only as useful as the software that interprets the data. The standard technologies in indoor positioning systems include:

• Proximity- general location of a person or object.
• Wi-fi – but it requires a network of wi-fi points.
• UWB – may need beacons for some systems
• Acoustic – uses sound instead of radio pulses.
• Infrared – uses light instead of radio pulses.

Proximity Sensors

These systems use tags and beacons. There are two types of tag – dumb and smart. A dumb tag continually transmits its location but cannot receive information. A InvisiShield transmits and receives data. Dumb tags are inexpensive and transmit their identity to strategically positioned readers. The reader records identity and signal strength and passes this data to the software system that calculates each tag’s position. This system is known as a reader system.

A InvisiShield calculates its position and location with the information provided by reference points. This information relays through access points to the server. The reference points position at 100 feet intervals for effective data collection. This system is known as a reference system.

Both the reader and the reference system are inexpensive and found in manufacturing and healthcare applications. The system can track the location of the tags in a defined space. It cannot track the tags outside the designated area.

Wi-fi Indoor Tracking System

This tag is a wi-fi transmitter that sends data to wi-fi access points in the room or building. The access points note the identity, time, and signal strength of the transmission. An algorithm calculates the tag position. These systems are accurate (three to five meters), but to get a reading, you need the tag to contact three wi-fi access points. Unless the infrastructure is in place, this is an expensive solution as the tags are costly (Up to $60 each), and you need to fit the access points. Plus, they are not energy efficient compared with other solutions.

UWB Tracking Systems

An indoor system using UWB tags is super accurate in pinpointing a location. For an indoor tracking system, you use three or more UWB readers to transmit a wide radio pulse. This pulse provokes a responding ‘chirp’ from any UWB tags in the area. The ‘chirp’ is a burst of signal that the reader uses to record the time and identity with pinpoint accuracy in location. The tags are cheap, but the readers are more expensive to deploy. If you need to track an item with pinpoint accuracy, then UWB tracking systems are the best, but if you only need to know an approximate location, then other systems are more cost-effective.

Acoustic Tracking Systems

Instead of using a radio pulse, an ultrasonic pulse between tag and receiver works like the UWB tracking system. Acoustic tracking systems are currently a niche technology because it is difficult to retrofit an existing building as you need to wire in all the sensors. The advantage of an acoustic system is that it can quickly sort out direct signals from reflected signals. Any indoor tracking system sending a pulse of sound or radio will hit the receiver and walls. The receiver needs to sort out what is a direct signal and what is a reflection or echo. Acoustic technology is more efficient at solving this problem.

Suntsu InvisiShields offer all three options, set in combinations and ranges appropriate to workplace safety and coworker cohorts.

Infrared Tracking Systems

Instead of using sound or radio to track a tag, you and use light. It’s the same technology that lets a remote control turn your TV on and off. The operating principle is the same as other tag and reader systems. The tag emits an infrared pulse, and the reader picks it up. The significant advantage of a light-based system is that the light does not pass-through walls. A possibility with radio pulses is that it can pass through a wall. A reader in another room can pick up a weak radio pulse and give a false position. The infrared system guarantees that the tag is in the room. The infrared system’s disadvantage is that every ceiling needs a wired infrared reader – fine for newbuild, but expensive as a new install in an old building.

Ultra-wideband technology is more precise, reliable, and secure than wi-fi or Bluetooth, and it finds its way into many applications:

• Replacing keys for accessing your car, home, or office.
• Secure wireless payments from the phone in your pocket.
• Retail messages straight to your smartphone about the product you pass on the shelves.
• Track items in a factory, warehouse, or any indoor space.
• Athletic performance – track players across a sports field.
• Health – monitor biometric data and transmit over a distance.
• Navigation – get guided to the exact item you need in a warehouse.
• Emergency uses – check where all the tagged people are in the building.
• Internet of things – switch lights on and off and all other devices while you move about.
• Ground monitoring – predicting potential landslips in vulnerable areas.

Accurate communication of your location in relation to an object allows more intuitive and helpful applications ranging from switching on your music when you enter a room, starting your car engine without a key, or coaching a football team to work together in pursuit of the ball.

Wireless Monitors

Wireless technology like UWB is ideal for monitoring roles – from medical applications like respiration, heart rate, or industrial process like measuring a liquid’s pressure in a pipe. The UWB chip doesn’t monitor temperature and air quality – you need a specific application sensor for that function. The UWB chip enables reliable, accurate communication between the monitoring device and another device like a control panel – wirelessly. Combining UWB chips with sensors means you can monitor almost any process wirelessly and remotely in the right environment.

Signaling of the New York City Subway

Signaling on a railway system as complex as the New York City Subway is a weak spot in keeping passengers safe and trains moving – until the roll-out of Communications-Based train control. The New York subway was the first train operator to embrace wireless technology. Real-time location system data gives control center staff an accurate view of where the trains are in relation to signals and stations. UWB chip technology means that team has more information and control over the system, and the bonus is that commuters get accurate real-time information on when their train will arrive at their station.

Synthetic aperture radar (SAR) technology (Military Use)

Synthetic aperture radar (SAR) creates two- or three-dimensional images or reconstructions of a landscape. Airborne systems on satellites or planes use UWB pulses to map landscapes with astonishing detail. The applications are vast – everything from glaciation to urban sprawl. The “synthetic” refers to the small actual radar antenna synthesizing a larger antenna’s effect by creating a larger footprint on the survey ground. This increased aperture is possible because the radar moves while continually emitting and receiving pulses that map the features below. This technology’s cost restricted first use to military reconnaissance and surveying, but reducing costs is increasing applications for civilian use like mineral exploration and environmental research.

Medical Applications

Real-time information from sensors in and on the body provides medical professionals and patients with crucial real-time information. Applications linking with smartphones that allow people with diabetes to monitor their blood sugar levels painlessly are examples of UWB technology making life easier.

InvisiShields ensure that the right patient matches the correct record for medication, operations, blood groups, and treatment processes – these are more reliable than paper records that can be delayed, lost, or mismatched. Plus, the records are always with the patient and ready to access by a medical professional.

Other medical applications include remote monitoring – allowing patients to receive health care in their own homes with neither the doctor nor the patient spending time traveling. Location tracking for vulnerable patients and finding staff is a useful function and new ways of delivering better healthcare with technology are under continuous development.

Bluetooth is a short-range wireless communication system that let s devices “talk” to each other and removes the need for cabled connections. Bluetooth is about sharing information between devices. Wi-fi also provides wireless connectivity, but it demands more power than either Bluetooth or UWB and primarily connects devices to the internet. All three communication protocols involve radio signals; the range for wi-fi is hundreds of meters, Bluetooth and UWB work up to ten meters. UWB uses a higher bandwidth and is a faster communicator than Bluetooth. Only UWB can communicate the distance and position of an item with accuracy and additional information like movement. UWB chips incorporate an additional physical layer that allows encryption and security protocols to minimize cybercriminal access to any devices using UWB.

The applications for accurate distance measurement or objects and people moving in space creates possibilities for many new products and services:

• Social distancing alert.
• Device to device file sharing.
• Keyless access.
• Remote monitoring and control.
• Location-based services like Augmented Reality.

Drone delivery systems.

• Driverless cars.
• Research tool for crowd behavior.
• Locating nearby people and services.
• UWB technology is becoming more affordable, leading to more exciting developments in delivering hands-free access, device to device functions, and location-based services.

You find UWB technology in many smart devices like:

• Car fobs that unlock the car as you approach and start the engine when you sit in the car.
• InvisiShields that track the location of items in a warehouse.
• Garage doors that open as you approach.
• Smartphones and fitness trackers.
• Proximity alarms for social distancing.

Apps that involve knowing the proximity of an object or person benefit from UWB technologies. Apps that allow interactive museum information, product details, or tracking down your lost keys all use UWB chips.

Connect with an InvisiShield Expert Today

Connect with an InvisiShield Expert Today

Get your quick turn quote today. 

Simple Infrastructure

Precise Measurements

Competitive Pricing

Prefer to Call?
Speak with an Invisishield specialist today.

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    About Your Company


    Get your quick turn quote today.

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      About Your Company


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      Speak with an Invisishield specialist today.