MQ131 Breakout detection range mismatch: ppb vs ppm

TECHNICAL SUPPORT Sensors & Modules
1

Customer:

The key features list “Detection range: 10 … 1000ppb ozone” but the pictures show the MQ131 for High Concentration (10…1000ppm) on the circuit board. This doesn’t match the pictures in the Winsen electronics datasheets. Is there an error in the key features, or which concentration range is this sensor supposed to cover?

Originally submitted via email support on 4 June 2025. Migrated to the forum for community visibility.

2

Soldered Support:

You are correct. The sensor sold is the high concentration model, but the datasheet and Arduino library configuration are designed for the low concentration model. We will update the product description to clarify this in the future.