Privacy Policy


Welcome to, the website and online service of Sensus, a project that is funded by Streamr Network AG.

At Sensus, we respect your privacy and your control over your own personal data.

In this Privacy Policy, we explain what kind of personal data we collect from people who sign up to the Sensus project or participate in the Sensus project in other ways. We also explain why we collect such information, how we use it, how we keep it secure, and who we share it with, as well as how you can exercise your rights with regard to your personal data.

Personal data means any data that allows the identification of a person directly or indirectly. For example, combining various data may enable identifying a person even when each data separately would not allow that. Personal data can include many types of data, such as a name, location data, an online identifier, IP address or the like.

We regularly review our Privacy Policy and may change it from time to time. Please review this Privacy Policy from time to time to stay tuned with our practices. By using the Sensus website and participating in the Sensus project, you agree to this Privacy Policy and are bound by it.

Who are we and how can you contact us?

We’re Sensus, a project funded by Streamr Network AG, a limited company (Aktiengesellschaft) incorporated in the Canton of Zug in Switzerland (registration number CH-177.792.543).

If you have any questions about this Privacy Policy or if you would like to exercise your rights to
your personal data described further below, please contact us by email at

What personal data is being processed?

To hear more about the Sensus project, we ask you to sign up and register through a Mailchimp email capture. At your option, you can register at three different levels depending on your interest:

• Champion – this level is for a small group of passionate clean air campaigners who wants to help us shape the Sensus project

• Host – this level is for persons who want to be a host for one of the 50 Smart Citizen sensors

• Subscriber – this level is for all persons who signs up on our website to hear more about the Sensus project and who wants to be kept up to date with the Sensus project

When you sign up to the Sensus project, we will collect the following information directly from you:

• Champion: your first name and last name, your email address, your telephone number, your address

• Host: your first name and last name, your email address, your telephone number, your address

• Subscriber: your first name and last name, your email address

If you sign up as a subscriber, we will process your name and you email address in order to keep you informed about the Sensus project and the progress of the Sensus project. If you sign up as a host or champion, we will process you name, email address and telephone number to keep in contact with you during the Sensus project and your address to monitor the location of our sensors. Your home location may also appear on a Sensus project map for internal use to enable us to monitor the areas in which we have our sensors placed.

We will hold all information related to subscribers in the Mailchimp database. Information related to champions and hosts will, in addition to the Mailchimp database, be held in our own secure internal database/spreadsheet on a secure google drive.

How do we obtain personal data about you?

We obtain all personal data directly from you when you sign up on our Sensus website. We also obtain your personal data when you link your social media account on a third party website or network such as Twitter, Facebook or Instagram to Sensus by following or liking content relating to Sensus. Your personal data may also be collected by analytics providers, such as Google Analytics, used by our website.

Who is collecting the personal data?

We (i.e. Sensus) are collecting the personal data as described in this Privacy Policy.

We may also acquire statistical data about visits to the Sensus website from Google Analytics.

For what purposes is your personal data processed?

We may process your personal data for the following purposes:

• To keep you updated with the Sensus project;

• To help facilitate the Sensus project;

• To send you emails about the Sensus project, Sensus events or your involvement in the project; or

• To send you notices about any updates on the Sensus website, e.g. updates to this Privacy Policy.

What is the legal basis for processing your personal data?

We process your personal data based on our legitimate interests. This means that we have a legitimate interest to process your personal data based on our relationship with you as a participant in our Sensus project and your use of our Sensus website. This also means that there at the same time is a limited privacy impact on you and that you, when you sign up for the Sensus project, reasonably can expect your personal data to be processed based on our legitimate interest. Further, we have a legitimate interest to communicate with you as a user of our Sensus project about relating community events and projects, unless you have declined such communications.

We may also process your personal data for specific purposes based on your consent, if we have separately requested and obtained your consent.

How is your personal data protected?

Any personal data we collect from you is entered by you directly on secure web pages. A lock icon will appear in a web browser to indicate that a web page is secure. Once we receive your data, we take steps to ensure that it’s treated securely. Your personal data is stored on servers and computers protected by user names and passwords, firewalls and asymmetric cryptography keys according to the best practice and industry standards. Passwords are stored in encrypted form.

Will the personal data be shared with any third parties?

As a general rule, we will not transfer your personal data to third parties, unless we are required to do so by law, a court order or similar judgement, or unless we obtain your prior consent. However, we may use third party subcontractors (e.g. hosting service providers) in providing our services, in which context they may also process your personal data. We always have data processing agreements in place with such subcontractors to ensure the secure processing of your personal data. At the date of this Privacy Policy, we are using the following third party subcontractors which may process your personal data:

• Mailchimp

• Google Drive

Transfer of your personal data outside the EU or the EEA

Countries outside the European Union (“EU”) or the European Economic Area (“EEA”) (all, “third countries”) may not have a similar level of protection for personal data as the EU and the EEA. As part of providing your personal data to the Sensus project, your personal data may be transferred to such third countries. This may happen if any of the servers of the Sensus project (or servers participating in the operations of a blockchain we use) happen to be located in a third country. This may also happen if you access the Sensus project while you are outside the EU or the EEA.

Any transfer of your personal data to a country outside the EU or the EEA will be made only provided that the EU Commission has decided that the third country ensures an adequate level of protection of personal data in accordance with the EU General Data Protection Regulation (679/2016) or, if such decision has not been made for the country in question, in accordance with the EU Commission’s standard contractual clauses for personal  data transfers.

For more information about the EU Commission’s standard contractual clauses, see this link:

For clarity, the EU Commission has determined that Switzerland is a country with an adequate level of protection.

How long will the personal data be stored for?

Your personal data will be kept for the duration of the Sensus project only. The Sensus project will end by the end of 2019 at the latest.

We will retain your personal data only for as long as it is relevant for the purpose for which
it was collected and will delete any personal data that is no longer relevant.

We will also comply with any applicable laws or statutes which obligate us to retain your personal data for a specific time period, such as the mandatory retention periods under accounting laws and regulations.

As regards any personal data that we process based on your consent, we will retain such data for as long as it is relevant for the purpose for which the data was collected, unless you withdraw your consent before that.

Your choices and consent preferences

You decide whether and how much information you wish to receive from us. If you do not wish to receive further communications from us, you can at any time click on the “unsubscribe” link in any email communications received from us, or reach out to us by email at and let us know that you wish to unsubscribe from the information we provide.

How you can access and update your personal data

You can request access to, request to update or request to correct your personal data by communicating with us by email at or by contacting us through the contact form on our website.

Children below 18 years of age

In order to protect the privacy of children‚ the minimum age for signing up on to the Sensus
project is 18 years.

Use of 'cookies’ on our website

'Cookies' are small pieces of information sent by the website to your computer and stored on your hard drive. They are commonly used to make websites work better and to allow websites to recognize you during your session and on your next visit.

The Sensus website may use cookies through Google Analytics. The information collected using cookies on our platform may include, in particular, browsing behavior on our website and other statistical information.

It is possible to switch off cookies in your browser preferences.

Links to other websites

Our website may contain links to websites run by other companies, organizations, or individuals. This Privacy Policy only applies to the Sensus website. We are not responsible for the privacy policies or practices on third party websites, and we ask you to familiarize yourself with the privacy policies of other sites which you find using such links.

What rights do you have with regard to your personal data?

You have various rights with regard to your personal data. Please note that the particular rights may be subject to qualifications or specific requirements arising from, for example, applicable laws, that are not fully described here.

• Right to access your personal data: You have the right to obtain confirmation from us whether your personal data is being processed. You also have the right to  access your personal data and to obtain certain information, such as the purposes of processing your personal data and the types of personal data involved.

• Right to rectification: You have the right to request us to correct inaccurate personal data about you.

• Right to erase: You have the right to request us to erase personal data about you in certain situations, such as if the data is no longer necessary for the purposes for which it was collected, if processing such data is unlawful or if the data was processed based on consent and you withdraw your consent.

• Right to restriction of processing your personal data: You have the right to restrict processing of your personal data in certain situations. If you exercise this right, we are generally only allowed to store the data in question. You might exercise this right, for example, if you believe that the personal data we hold about you is inaccurate, in which case your right to restriction of processing would apply for the time that it takes us to verify whether your belief is correct.

• Right to object to processing your personal data: You have at any time the right to object to processing your personal data for direct marketing purposes. You are also entitled to, on the grounds of your particular situation, object to processing of your personal data that we do based on our legitimate interest.

• Right to data portability: You have the right to obtain your personal data in a structured, commonly used and machine-readable format and to transfer the data to another controller, if we process your personal data based on your consent or because of a contract that we have entered with you. For this right to be available to you, our processing of your personal data must take place by automated means.

• Right to withdraw your consent: To the extent we process your personal data based on your consent, you have the right to withdraw your consent at any time. You can do so by sending an email to Withdrawing your consent does not affect the lawfulness of processing of your personal data based on consent before its withdrawal.

• Right to make a complaint with the data protection authorities: You have the right to make a complaint with the data protection authorities concerning our processing of your personal data. You can make the complaint with the data protection authority of the EU member state where you have your permanent residence or where you work, or where you find that a potential breach with regard to your personal data has occurred.

Last updated: September 2018