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Description
Features:
| CATEGORY | SPECIFICATIONS |
|---|---|
| Product Type | Gas Detection Sensor Module |
| Gas Detected | Ammonia (NH₃) vapor / gas |
| Detection Range | 10 – 300 ppm |
| Sensor Type | Electrochemical / gas sensing probe (NH₃ sensitive element) |
| Main IC | LM393 comparator |
| Operating Voltage | DC 5 V |
| Output Types | Analog output (AO) + Digital TTL output (DO) |
| Digital Output (DO) | Active LOW signal when gas concentration exceeds threshold |
| Analog Output (AO) | Voltage increases with gas concentration |
| Indicator | Built-in signal LED indicator |
| Sensitivity | High sensitivity and selectivity to ammonia gas |
| Response Time | Fast response and recovery |
| Stability | Long service life, stable performance |
| Physical Size | 32 mm × 22 mm × 30 mm |
| Mounting | Integrated mounting holes for installation |
| Probe Design | Plug-in / removable probe for easy replacement and testing |
| Key Features | Dual output, adjustable threshold behavior (via circuit design), real-time monitoring |
| Operating Principle | Gas concentration increases → sensor conductivity changes → analog voltage rises / digital trigger activates |
| Applications | Household gas safety systems, environmental monitoring, ammonia leak detection, industrial safety, laboratory monitoring |
| Additional Support | Provides reference circuits, example routines, and probe instructions |
Package Includes:
1 x MQ-137 Ammonia Sensor Module NH3 Sensor Module
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