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Description
Features:
| CATEGORY | SPECIFICATIONS |
|---|---|
| Product name | Soil moisture sensor module (LM393 comparator type) |
| Function | Detects soil moisture for automatic irrigation and plant monitoring systems |
| Operating principle | Compares soil moisture level against a preset threshold using an LM393 comparator |
| Operating voltage | 3.3 V – 5 V |
| Output modes | Digital output (DO) and analog output (AO) |
| Digital output behavior | High level when soil is dry; low level when soil moisture exceeds threshold |
| Analog output behavior | Provides continuous moisture level for more precise measurement |
| Comparator chip | LM393 stable voltage comparator |
| Sensitivity adjustment | Adjustable via blue digital potentiometer |
| Indicator lights | Red power indicator and green digital output indicator |
| PCB size | 3 cm × 1.5 cm |
| Probe size | 6 cm × 2 cm |
| Cable length | 21 cm |
| Pin configuration | VCC (3.3–5 V), GND, DO (digital output), AO (analog output) |
| Installation feature | Includes fixed bolt hole for easy mounting |
| Applications | Automatic watering systems, soil moisture monitoring, agricultural irrigation control, alarm systems for soil dryness |
| Usage notes | DO can directly interface with microcontrollers or drive modules such as relays and buzzers; AO requires ADC for precise readings |
Package Includes:
- 1 x Soil moisture detector module
- 1 x Probe
- 1 x 2P Jumper Cable
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