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We've had makeover! Tether Airborne Index was previously known as COVIDCare


Tether Airborne Index for Schools

Tether’s CO2 monitoring solution to managing airborne virus transmission risk in schools (airborne virus includes COVID, flu, pertussis (whooping cough) and RSV - respiratory syncytial virus.) 

How do we make sure our schools are safe? 

By monitoring the air our teachers and children are  breathing.


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Due to high demand, inventory is limited. Get a quote today!

Airborne viruses (like the flu and Covid-19) can be spread by breathing in air exhaled by another person.  High CO2 levels in the environment means a higher % of the air you breathe is shared with other people which leads to a higher exposure risk.

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Airborne viruses are spread in tiny, invisible droplets called aerosols that are expelled when infected people exhale

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The more people in a shared space, the greater the risk of infection

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Making sure spaces are well-ventilated is key to reducing the spread viruses


CO2 monitors show which areas need better ventilation 

"If you are sharing air, the lower the CO2, the lower risk of infection.”

​Jose L. Jimenez. Exhaled CO2 as a COVID-19 Infection Risk Proxy for Different Indoor Environments and Activities. Environmental Science & Technology Letters, 2021


The smart choice

The most effective way to tackle uncertainty is with science. 


Tether’s Airborne Index CO2 monitoring offers live data, allowing you to make educated, safe decisions. 


Get real-time risk alerts and effect quick, healthy responses 

Classrooms in England are to be fitted with CO2 monitors when state schools and colleges reopen after the summer holidays, in an effort to improve ventilation and combat the spread of Covid... Read more

How it works


Scan to activate and stick the monitoring device to the wall of your premises


Your device will scan the air in real-time, tracking the CO2 levels in the space

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You will be alerted well ahead of time if CO2 is rising, allowing you to increase ventilation and reduce the transmission risk


Your customers feel safe and happy knowing and being able to see in real-time they are at a low risk


Knowledge is power

Data is recorded and stored to be able to track trends and preempt disruption. 


Keeping CO2 levels down mitigates learning disruption. 

We may not be able to control airborne viruses, but we can go a long way to preventing their spread 

Power - at your fingertips


Looking after our communities

Reduce the risk and fear associated with close contact after months of isolation and limited numbers in groups. 


Teachers, parents, and learners are able to monitor live, real-time CO2 levels on public display  


Provide a much-needed additional layer of airborne virus protection for our young and unvaccinated. 

“Schools are an important part of the infrastructure of communities, as they provide safe and supportive learning environments for students, employ teachers and other staff, and enable parents, guardians, and caregivers to work.”

- Centre for Disease Control and Infection

Install in seconds

Order the monitor, install the app. Scan and stick.

It's that easy.

  • DIY or we can get you set up for bigger premises

  • No wifi is required

  • 1 year battery life 


“The app alerts me to rising CO2 levels in certain classrooms or pods and as I enter the space with my phone, the students now immediately jump up to open a window or door, it’s become a bit of school fun, the kids shout out ‘ohhh! here comes Trevor.”

Read more case studies

COVID Care Quote
  • How many sensors do I need?
    The typical minimum installation within a home would be: 1 x EnviroQ in the room you would like to monitor. 1 x ThermalQ installed outside to compare with Indoor environmental quality. 1 x HotDrop on the main incoming power. The typical recommened installation within a home would be: 1 x EnviroQ in every BEDROOM and one in the largest common living area 1 x ThermalQ installed outside to compare with indoor environmental quality 1 x HotDrop on the main incoming power
  • Why is it recommended to have more than one EnviroQ / ThermalQ in my building?
    The EnviroQ is only able to monitor the Indoor Environmental Quality of a space where the air and environmental conditions can distrubute evenly. As soon as a space can be closed off with doors or windows then that space will create its own micro-climate over time and a seperate EnviroQ or ThermalQ is required.
  • How do I get pricing?
    We do not advertise pricing. Tether is priced based on volume and contract terms. To get a quote please email with your request or click HERE.
  • Can Tether devices connect to WiFi?
    No, Tether devices connect via the SigFox and LoRAWAN networks. We have done this so that Tether devices will have no reliance on dedicated internet connections within the buildings they are installed. This also makes our devices incredibly secure.
  • How do I install Tether devices?
    Tether devices are installed, replaced and removed through the Tether management application which can be downloaded from the Apple App store or Google play store
  • How do I get the Healthy Homes Compliance feature?
    The healthy homes compliance check is available through the Tether management app when enabled for your account. If you are interested in running Healthy Home Compliance checks then please let us know by emailing us on or click HERE.

How do we make sure our schools are safe?

By monitoring the air our teachers and children are breathing.

Class Raising Hands

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“People infected with coronavirus can spread it around a room in tiny airborne droplets called "aerosols" when they breathe out, speak, shout or sing.

These aerosols build up indoors, especially when a place is crowded or there is poor ventilation, and the longer you are surrounded by them, the more chance you have of breathing them in.

Unfortunately, the aerosols are so small you can't see them, which is where the CO2 meters come in.


In addition to aerosols, we also breathe out CO2 — a byproduct of respiration — which builds up in the air unless a space is ventilated.

And this CO2 is easier to measure than the aerosols or virus particles themselves.

So the level of CO2 in a space can be used as proxy for the possible risk of exposure to coronavirus.”

Anna Salleh; ABC Health & Wellbeing

Are you prepared to take the risk of being the only school without Airborne Index?


Airborne Index for Businesses

Learn how Airborne Index helps businesses

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