# Sensors.social: an open air-quality network on Polkadot is growing across the EU

**URL:** <https://forum.polkadot.network/t/sensors-social-an-open-air-quality-network-on-polkadot-is-growing-across-the-eu/19344>\
**Category:** Ecosystem\
**Created:** [November 10, 2026, 7:37pm UTC](https://forum.polkadot.network/t/sensors-social-an-open-air-quality-network-on-polkadot-is-growing-across-the-eu/19344 "2026-11-10T19:37:47Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![ensrationis](https://dub1.discourse-cdn.com/flex005/user_avatar/forum.polkadot.network/ensrationis/32/7927_2.png) [@ensrationis](https://forum.polkadot.network/u/ensrationis)\
**Post date:** [November 10, 2026, 7:37pm UTC](https://forum.polkadot.network/t/sensors-social-an-open-air-quality-network-on-polkadot-is-growing-across-the-eu/19344/1 "2026-11-10T19:37:47Z")

</div>

Hi all — EnsRationis from Robonomics.

Sensors.social is an open environmental data network I designed, and it is now growing across the EU. Everything is open source: the Altruist sensors that feed it, the software that collects the readings, and the map.

Web3 does one job here, the one it is good at: it settles the data as a common good anyone can check, not a vendor’s database.

**How it works on Robonomics**

- Owners who choose to share their Altruist’s data join the network; each sensor has its own key and signs every measurement it sends.
- A connectivity node checks the signature and that the sensor has an active subscription on Robonomics, a parachain on Polkadot, then passes the reading to the live map.
- The node collects readings into batches, stores each batch on IPFS and writes its hash to Robonomics. Anyone can fetch a batch and check it against the chain.
- The network is federated: a city or a lab can run its own connectivity node, and its sensors still show up on the common map.
- Next, with Robonomics 5.0: the reading the sensor signed goes on chain itself, so there is no need to trust the node at all.

Try the map: [https://sensors.social](https://sensors.social)

![sensors-social-europe](https://europe1.discourse-cdn.com/flex005/uploads/polkadot2/original/2X/8/8f135c0ee53e4584c0bc4dcc6622c50702e53f0b.gif)

Happy to hear from anyone who wants to run a sensor in their city or build on the data.