Level Sensors
Product Overview
Pressure-type submersible level sensors for tanks, sumps, and borewells — models, specifications, and use cases.
What is an HPzenAi Level Sensor?
HPzenAi level sensors are submersible pressure-type sensors that measure water depth in tanks, sumps, underground reservoirs, and borewells. They connect to the HPzenAi Gateway via RS485 Modbus RTU and deliver real-time water level readings — displayed as millimetres, metres, and tank fill percentage — to the HPzenAi app. Automated alerts and pump control rules can be configured directly from the app to protect against overflow and dry-run conditions.
Highlights
- Submersible Pressure Sensing: IP68-rated sensor body measures hydrostatic pressure to calculate precise water depth from 0 to 10 metres
- RS485 Modbus RTU: Reliable wired communication to the HPzenAi Gateway — up to 100 m recommended cable run, daisy-chain up to 32 sensors on one bus
- Smart Alerts: High-level overflow alerts, low-level dry-run protection, and level trend notifications delivered instantly to the app
- Historical Level Data: Continuous level logging with usage trends, min/max tracking, and automated pump control via gateway automation rules
Product Description
HPzenAi LS-PRE series sensors use calibrated piezoresistive pressure elements sealed in a stainless-steel and HDPE submersible body. A vented cable runs from the sensor to the surface, compensating for atmospheric pressure variations to deliver accurate absolute depth readings. The RS485 output communicates measurement data in millimetres — the HPzenAi app converts this to percentage of tank capacity and metres of water depth based on the configured tank height.
| Attribute | Detail |
|---|---|
| Sensor Type | Submersible Piezoresistive Pressure Sensor |
| Measurement Output | Water depth in mm (converted to % and metres in app) |
| Sensor Body | Stainless steel, IP68 rated |
| Cable Type | Vented 3-core cable (Power, RS485 A, RS485 B) |
| Communication | RS485 / Modbus RTU |
| Power Supply | 12 V DC (via gateway RS485 bus or separate supply) |
| Available Ranges | 2 m, 4 m, 6 m, 8 m, 10 m (full-scale depth) |
| Accuracy | ± 0.5% full scale |
| Operating Temp. | 0 °C to 60 °C |
| Storage Temp. | −20 °C to 70 °C |
| Cable Length | 10 m standard (custom lengths available) |
| Gateway Integration | HPzenAi Gateway — RS485 Modbus RTU to HPzenAi cloud |
Applications & Use Cases
HPzenAi level sensors are deployed wherever reliable, continuous water level monitoring is needed — from residential tanks to industrial sumps and deep borewells.
| Application | Description |
|---|---|
| Overhead Tank Monitoring | Track fill levels in rooftop and elevated storage tanks with overflow alerts and automatic pump shutoff |
| Underground Sump Monitoring | Monitor sump pit levels to trigger submersible pump start and prevent basement flooding |
| Borewell Depth Monitoring | Measure groundwater levels in borewells up to 10 metres to detect depletion and protect pumps from dry-run damage |
| Open Well Monitoring | Continuous level reading in open irrigation wells for informed water extraction scheduling |
| Rainwater Harvesting Tanks | Monitor collected rainwater volume in storage tanks and route overflow to secondary storage automatically |
| Industrial Process Tanks | Level monitoring in manufacturing and processing facilities where chemical compatibility allows water-grade sensors |
| Apartment Sump Automation | Automated motor control in residential complexes — pump starts and stops based on sump level thresholds set in the app |
| Agricultural Reservoirs | Remote monitoring of farm water storage reservoirs using gateway SIM connectivity where Wi-Fi is unavailable |
Available Models
All LS-PRE series models share the same RS485 Modbus RTU interface and physical form factor — choose the model with a full-scale range that matches or slightly exceeds the maximum water depth of your tank or borewell.
Series and Models
LS-PRE-2M
0–2 Metre Range
- LS-PRE-2M: rs485
LS-PRE-4M
0–4 Metre Range
- LS-PRE-4M: rs485
LS-PRE-6M
0–6 Metre Range
- LS-PRE-6M: rs485
LS-PRE-8M
0–8 Metre Range
- LS-PRE-8M: rs485
LS-PRE-10M
0–10 Metre Range
- LS-PRE-10M: rs485