MQ-137 NH3 Gas Sensor Module for Ammonia, Carbon monoxide Detector Module Raspberry Pi4 2-4-8GB Model 4B Ultimate Kit- Case Self-Locking Note: 4-start lead screws

Self-Locking Note: 4-start lead screws with 8mm lead are generally NOT self-locking

Each LED is individually addressable and can also function as a light sensor

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freeing up GPIO pins for sensors

MQ-137 NH3 Gas Sensor Module for Ammonia, Carbon monoxide Detector Module Raspberry Pi4 2-4-8GB Model 4B Ultimate Kit- Case Self-Locking Note: 4-start lead screwsMQ 137 NH3 Gas Sensor Module for Ammonia & Carbon Monoxide Detection Product Overview The MQ 137 Gas Sensor Module is a high sensitivity semiconductor gas sensor designed for detecting ammonia (NH3) and carbon monoxide (CO) in various applications. This reliable, cost effective solution is ideal for environmental monitoring, industrial safety systems, and DIY electronics projects. Key Features High Sensitivity Detects ammonia concentrations from 10