![Air quality alert system being held up by a hand](https://i0.wp.com/blog.particle.io/wp-content/uploads/2024/06/Screen-Shot-2024-06-21-at-3.47.45-PM.png?fit=325%2C288&ssl=1)
How to add a long-lived anomaly detection system to an air quality monitor using Particle’s cloud ledger
This tutorial shows you how to build a long-lived anomaly detection system using Particle Ledger
![](https://i0.wp.com/blog.particle.io/wp-content/uploads/2024/07/mithun.jpeg?fit=96%2C96&ssl=1)
Mithun Das
August 01, 2024This tutorial shows you how to build a long-lived anomaly detection system using Particle Ledger
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