The MQ-137 is a high-sensitivity ammonia gas sensor, ideal for detecting ammonia and other organic amines like trimethylamine and ethanolamine. It uses tin dioxide (SnO2) as the sensing material, which has low conductivity in clean air. When ammonia or other gases are present, the conductivity of the sensor increases proportionally to the gas concentration, which can be measured through a simple circuit. The sensor offers excellent selectivity and sensitivity to ammonia with a broad range of applications, from industrial to household environments. The MQ-137 is a low-cost and reliable solution for gas detection.

Key Features:

1. Dual Output Signals: Provides analog and TTL level outputs for flexible integration.
2. TTL Output: Outputs a valid low-level signal, easily connected to microcontrollers.
3. Analog Output: Voltage increases with gas concentration, from 0 to 5V.
4. High Sensitivity: Excellent sensitivity to ammonia and organic amines.
5. Long Service Life: Reliable and stable performance over time.

Applications:

• Ammonia Gas Detection: Ideal for industrial and household applications to monitor ammonia levels.
• Organic Amine Detection: Suitable for detecting gases like trimethylamine and ethanolamine.
• Gas Leak Monitoring: Effective for use in gas leak detection systems for safety and environmental monitoring.