IoT Pro
Level Submersible Module
Industrial-grade submersible level monitoring module using hydrostatic pressure sensing, designed for long-term deployment in stationary tanks, reservoirs, wells, and underground infrastructure, and built on the IoT Pro hardware architecture.
Product Code: IOTPRO-LEVEL-SUBMERSIBLE-MODULE
Product Overview
The IoT Pro – Level Submersible Module is a hydrostatic level monitoring device designed to measure liquid level by sensing pressure at a fixed depth within a tank, reservoir, or well.
The module interfaces with an industrial submersible pressure probe, fully immersed in the monitored liquid, and converts pressure measurements into accurate and repeatable level data for software platforms.
From a system architecture perspective, the device functions as a continuous level acquisition node for stationary assets, providing stable, long-term measurements where non-contact sensing is not required and where immersion-based measurement is preferred or already standard practice.
The solution is particularly suited to applications involving clean or mildly corrosive liquids such as water and diesel, where long-term accuracy, predictable behaviour, and low maintenance are required.
Typical Installation Points
The IoT Pro Level Submersible Module is typically installed at stationary liquid assets where continuous level monitoring is required and physical immersion of a probe is acceptable. These installations often involve deep underground locations, limited access, and intermittent or unreliable power availability.
Diesel Tanks & Reservoirs
Construction Site Fuel Tanks / Fleet Refueling
Water Tanks & Reservoirs
Rooftop Water Tanks / Irrigation Reservoirs / Groundwater Wells
Underground Water Storage
Urban Buffer Storage / Flood Management / Emergency reserves
Wells & Boreholes
Rural Water Supply / Groundwater Monitoring
Rainwater Harvesting Tanks
Building Reuse Systems / Irrigation Supply / Stormwater Capture
Process Water Tanks
Manufacturing Operations / Cooling Systems / Cleaning & Washdown
Industrial Liquid Storage Tanks
Chemical Storage / Process Liquids / Raw Material Buffering
Utility & Infrastructure Storage
Network Balancing / Emergency Contingency / Service Reliability
Measurement & Sensing Capabilities
The IoT Pro Level Submersible Module uses hydrostatic pressure measurement to determine liquid level, providing stable and accurate readings independent of surface turbulence, vapours, or foam.
Submersible Pressure-Based Level Measurement
The connected submersible probe measures the hydrostatic pressure exerted by the liquid column above it, which is directly proportional to liquid height.
This measurement approach offers:
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Continuous and smooth level readings
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Immunity to surface conditions
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Suitability for deep tanks and wells
Submersible Level Sensor Specifications
Sensor Type | Submersible hydrostatic pressure transmitter |
Measurement Principle | Diffused silicon pressure sensing |
Pressure / Level Range | 0–1 m to 200 m (H₂O - Water) |
Accuracy | 0.5% FS |
Long-Term Stability | 0.25% FS / year |
Probe Material | Stainless steel 304 |
Protection Rating | IP68 |
Cable Type | Vented cable for atmospheric compensation |
The submersible probe is fully sealed and vented to atmosphere, ensuring accurate and drift-resistant level measurement over long deployment periods
Submersible Level Sensor Specifications
Sensor Type | Submersible hydrostatic pressure transmitter |
Measurement Principle | Diffused silicon pressure sensing |
Pressure / Level Range | 0–1 m to 200 m (H₂O - Water) |
Accuracy | 0.5% FS |
Long-Term Stability | 0.25% FS / year |
Probe Material | Stainless steel 304 |
Protection Rating | IP68 |
Cable Type | Vented cable for atmospheric compensation |
The submersible probe is fully sealed and vented to atmosphere, ensuring accurate and drift-resistant level measurement over long deployment periods
Submersible Level Sensor Specifications
Sensor Type | Submersible hydrostatic pressure transmitter |
Measurement Principle | Diffused silicon pressure sensing |
Pressure / Level Range | 0–1 m to 200 m (H₂O - Water) |
Accuracy | 0.5% FS |
Long-Term Stability | 0.25% FS / year |
Probe Material | Stainless steel 304 |
Protection Rating | IP68 |
Cable Type | Vented cable for atmospheric compensation |
The submersible probe is fully sealed and vented to atmosphere, ensuring accurate and drift-resistant level measurement over long deployment periods
IoT Pro Hardware Architecture
Power-Intelligent, Long-Life Operation
Supports standard and extended battery configurations for multi-year operation in underground tanks and wells, as well as external DC or solar power where available, with rechargeable internal battery backup.
Flexible Connectivity, One Integration Model
Supports LoRaWAN, NB-IoT, LTE Cat-1, and Wi-Fi using the same integration model, enabling deployment in remote underground locations using LoRaWAN or cellular, or private Wi-Fi where available.
Antenna & Mechanical Configuration Flexibility
Internal antenna operation suits most installations, while external SMA and through-lid antenna options are critical for underground tanks, chambers, and concrete or metal enclosures.
Simplified Commissioning & Field Deployment
Factory pre-configuration, magnet-based activation, on-device LEDs, and optional Bluetooth diagnostics minimise installation time and reduce dependence on specialised personnel.
Additional I/O Interfaces
Beyond level sensing, the IoT Pro Level Submersible Module provides auxiliary interfaces that allow it to act as a combined sensing and control device. This hybrid architecture allows level data to be combined with auxiliary status signals and control actions within a single product.
Digital Inputs
4 x Digital Inputs
Dry Contact Inputs
Pulse Inputs
Temperature Probes (DS18B20)
Suitable for monitoring contact-based signals and discrete events such as door status, limit switches, tamper contacts, auxiliary temperature points, and pulse outputs from counters or meters.
Analog Input
1 x 0-30 V Voltage Input
1 × 4–20 mA Analog Input
For monitoring power sources, batteries, and industrial sensors such as pressure, level, flow, or gas transmitters.
Digital Output
2 x Digital Open-Drain Output
500 mA Continuous Current
Up to 1 A Pulse Capability
Suitable for relay driving, signalling, or interfacing with external equipment.
System Integration Context
The IoT Pro Level Submersible Module is designed to integrate as a core sensing component within IoT Pro solutions for stationary water and liquid infrastructure monitoring.
Refer to Water & Wastewater Infrastructure Monitoring and Utility Infrastructure Monitoring.
Technical Documentation
All documentation is written for software integrators, system engineers, and deployment teams and aligns with the IoT Pro platform architecture.