IoT overhead tank water level monitoringEvaraTank
Smart eyes on your water tank
Real-time tank level, overflow and usage insights, measured without touching the water.
- 0.3 to 5 m
- Range
- ±1 cm
- Accuracy
- 30 days
- Battery backup
The problem
Why this exists.
Every home, hotel, hospital, school and apartment has overhead tanks, yet nobody knows when they are full, half-empty or dry. Tanks overflow and waste water; pumps run dry and burn out; climbing to the roof to check is unsafe and impractical.
How it works
The operating principle.
EvaraTank sits on top of the tank and times an ultrasonic pulse to the water surface and back. It estimates inflow and outflow, detects leaks, and sends overflow alerts without ever contacting the water.
01
Trigger
A 10 µs pulse on the TRIG pin starts a measurement cycle.
02
Transmit
The sensor emits eight ultrasonic pulses at 40 kHz toward the water surface.
03
Listen
The reflected echo returns and the Time of Flight is measured.
04
Compute
Distance = (speed of sound × echo time) ÷ 2. Water level = tank height − distance, corrected for water temperature.
05
Report
The level is transmitted to EvaraOne for live monitoring, trends and alerts.
Capabilities
What it does.
Live level monitoring
Accurate, real-time water level and volume tracking.
Overflow & empty alerts
Instant notification before a tank spills or a pump runs dry.
Leakage & flow monitoring
Detects leaks and measures fill and draw rates in real time.
Temperature compensation
Contactless temperature sensing keeps readings accurate as conditions change.
Long battery life
Up to 30 days of backup through a blackout.
Rugged & reliable
IP65 waterproof design for rooftop exposure.
Where it's used
Built for these places.
Retrofit-first, so it installs onto infrastructure that is already there. No pipe cutting, no civil work, no permits.
- Overhead tanks, residential & commercial
- Apartments & gated communities
- Industrial water storage
- Hotels, hospitals & institutions
- Smart cities & municipalities
- Agriculture & irrigation
See it work
This is what EvaraOne shows for it.
A live simulation of the EvaraTank tile in the platform. The reading ticks, the trace draws, and you can cause the fault it exists to catch.
Level
64%
- Nothing to report. Press a button above to cause a fault.
Questions
About EvaraTank.
- How does EvaraTank measure the water level?
- It sits on top of the tank and times an ultrasonic pulse to the water surface and back. Nothing enters the water, so nothing corrodes or contaminates.
- How is EvaraTank installed?
- With a universal top mount on the tank. No pipe cutting, no civil work, and it fits overhead tanks, sumps and ground-level storage from 0.3 m to 5 m deep.
- How does it connect and how long does it run?
- 4G, NB-IoT, WiFi, LoRaWAN or BLE, reporting every 2 minutes by default, with up to 30 days of battery backup through a blackout.
Works with
Instruments deployed alongside it.
- EvaraDeepIoT borewell and groundwater level monitoringLive borewell water level, runtime and dry-run protection, with no electronics inside the well.EvaraDeep details
- EvaraValveIoT smart motorised valve for remote water controlTurns a conventional pipeline into a connected, remotely controllable, data-driven distribution system.EvaraValve details
- EvaraFlowSmart retrofit for analog water meters with AI meter readingTurns any existing analog meter smart with a clip-on camera and on-device Edge AI. No pipe cutting.EvaraFlow details
Ready to make every drop measurable?
Talk to the team building the operating system for water infrastructure, from a single tank to an entire smart city.