# MQ-137 (Component) ## Description Ammonia Gas Sensor. MQ-137 is an Ammonia (NH₃) gas sensor from Winsen. The sensing element is SnO2, which has lower conductivity in clean air. When NH₃ (Ammonia) gas exists, the sensor’s conductivity gets higher along with the gas concentration rising. #commonpartslibrary #sensor #gassensor #integratedcircuit ## Component Details - **Owner:** vasy_skral - **Created:** 5/3/2023 - **Last Updated:** 5/3/2023 - **Visibility:** Public - **Part Type:** Integrated Circuit - **Manufacturer Part Number:** MQ-137 - **License:** https://creativecommons.org/licenses/by/4.0/ - **Datasheet URL:** https://cdn.sparkfun.com/assets/7/0/2/f/8/MQ137__Ver1.4__-_Manual.pdf - **Manufacturer Name:** SparkFun Electronics - **Used in:** 60 projects - **Stars:** 1 - **Part Type:** Integrated Circuits - **Sub-Type:** Logic - **Manufacturer:** SparkFun - **MPN:** MQ-137 - **Pin Count:** 6 - **Logic Function:** AND ## Pins | Pin | Name | Type | |-----|------|------| | 1 | B1 | | | 2 | VH+ | | | 3 | B2 | | | 4 | A2 | | | 5 | VH- | | | 6 | A1 | | --- *Generated from [https://www.flux.ai/vasy_skral/mq-137~h38](https://www.flux.ai/vasy_skral/mq-137~h38)*