๐ ๏ธ MAKER GUIDEApr 14, 2026โขโฑ๏ธ 2 min readโข๐ณ๐ต Tested in Nepal
Underground Sump & Water Well Depth Monitoring with Hydrostatic Pressure Sensor & ESP32
Monitor true underground water reservoir volume and depth in liters with 0.5% industrial accuracy using hydrostatic pressure sensing and ESP32 cloud telemetry.
๐ ๏ธ BILL OF MATERIALS (BOM)
Required Hardware & Component Checklist
Curated components verified for this project. Check the items you need, adjust quantities, and add straight to cart:
Estimated Total (5/5 items):
NPRย 2,600
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NPRย 250
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Underground Sump & Water Well Depth Monitoring with Hydrostatic Pressure Sensor & ESP32
Traditional ultrasonic sensors in closed underground tanks often fail due to moisture condensation on sensor transducers. Hydrostatic pressure transmitters submerged at the bottom of the sump measure exact liquid head column depth in centimeters.
Hardware Bill of Materials (In Stock at Ghumti Pasal):
- Microcontroller: ESP32 (38 Pin) WiFi + Bluetooth NodeMCU-32 Development Board
- Signal Conditioner: Voltage Detection Sensor Module 25V
- Telemetry Display: 1602 (16x2) LCD Display with I2C/IIC interface - Blue Backlight
- Pump Contactor: 4 channel 5V relay module low trigger with optocoupler
- Power Supply: 12v 1 Amp Power Adapter
Circuit Pinout & Wiring Connections:
| Component / Sensor Pin | ESP32 GPIO Pin | Function / Description |
|---|---|---|
| Pressure Signal Out | GPIO 34 (ADC1_CH6) | 0-5V / 0-10V Scaled Hydrostatic Pressure |
| Voltage Module GND | GND | Common Circuit Return |
| 1602 LCD SDA | GPIO 21 | I2C Telemetry Data |
| 1602 LCD SCL | GPIO 22 | I2C Clock Bus |
| 4-Ch Relay IN1 | GPIO 18 | Automated Water Sump Pump Transfer Trigger |
| 4-Ch Relay VCC / GND | 5V / GND | Optocoupled Relay Power |
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