The pressure sensor unit — a stainless steel probe with cable, shown alongside the ESP32 controller. The probe is compact and rugged. Cable runs from the probe up through the cistern access to the controller above.
Sensor installed in a concrete cistern — probe resting on the cistern floor, cable routed up through the access lid to the ESP32 controller mounted nearby.
MirAqua Submersible Pressure Level Sensor
Sensor de Nivel por Presión Sumergible MirAqua
Industrial precision for any tank geometry
Submersible hydrostatic pressure sensor that sits at the bottom of any cistern or tank and measures the weight of the water column above it. Produces continuous, high-resolution level data regardless of tank shape, material, or obstructions. The most versatile sensor technology — works in concrete cisterns, irregular shapes, and tanks where ultrasonic reflections are unreliable.
Specifications
- Sensor Type
- Hydrostatic pressure (submersible)
- Range
- 0 – 5m water depth
- Accuracy
- ±0.5% full scale
- Output
- Continuous analog (0.5-4.5V)
- Material
- 316 stainless steel, food-grade silicone cable
- Compatible Tanks
- All — concrete, plastic, fiberglass, metal, any geometry
- Controller
- ESP32 with Wi-Fi
- Power
- USB-C, 5V (solar option available)
What's Included
- Submersible pressure probe (316 SS)
- 5m food-grade silicone signal cable
- ESP32 controller in weatherproof enclosure
- Mounting hardware
- Cloud dashboard access
- WhatsApp alerts
- Professional installation (included in Los Cabos area)
- 12-month warranty
Cómo Funciona
Hydrostatic pressure is directly proportional to the height of water above the sensor. A column of water 1 meter tall exerts a pressure of approximately 9.81 kPa. The submersible pressure sensor measures this pressure continuously and converts it to water depth with high accuracy.
Because the measurement is based on weight rather than reflection (ultrasonic) or proximity (capacitive), it works in any tank geometry — round, square, L-shaped, baffled, or irregular. It’s unaffected by foam, floating debris, or tank obstructions that can confuse ultrasonic readings.
Best For
Pressure sensors are the right choice for concrete cisterns with irregular geometry, shared condo cisterns with internal baffles or dividers, and any installation where the ultrasonic sensor can’t get a clean reflection (extremely deep tanks, narrow access, or tanks with significant internal structures).
They’re also the preferred technology for commercial and multi-unit installations where the absolute accuracy of level measurement matters for billing or allocation purposes.
The Tradeoff
The probe is submerged — meaning it contacts the water and can accumulate mineral scale in Cabo’s hard water over time. Annual maintenance (pull, clean, reinstall during cistern cleaning) keeps it accurate. For installations where zero maintenance is preferred, the ultrasonic sensor is the better choice.