IoT Water Level Monitoring
Non-contact overhead tank monitoring with phone alerts, pump control and a daily consumption log.
- Suitable for
- Diploma
- Technology
- ESP32
Intermediate6–7 days
Electronics · Sensing & Alarm
Water Level Indicator
Overhead tank level indication with staged LEDs, an audible full alarm and optional automatic pump cut-off.
- Difficulty
- Beginner
- Typical time
- 3–4 days
- Suitable for
- School
Price
Contact for price
Cost depends on components, complexity and which deliverables you need, so we quote after understanding your requirement.
Technologies
- Transistor switching
- Conductive level probes
- Ultrasonic ranging (variant)
- Relay control
Project overview
Conductive probes at four heights in the tank complete a circuit through the water as the level rises, lighting a corresponding LED on the indicator panel and sounding a buzzer at the full mark. It is a classic project precisely because the underlying idea — water conducts, so use it as a switch — is easy to explain and easy to test in front of an examiner.
The version with pump control adds a relay that cuts the motor at the full level and restarts it at the low level, which is the practical form actually used in buildings. That also gives you a hysteresis question to answer: why the pump restarts at the low probe and not the moment the level drops below full.
An ultrasonic variant is available where a non-contact measurement is preferred, giving a continuous reading on a display rather than four discrete steps.
Features
- Four-stage level indication with clearly labelled LEDs
- Audible alarm at the full level
- Optional relay output to cut and restart the pump
- Transparent tank so the level and the indication can be seen together
- Ultrasonic non-contact variant available
How it works
- 1Probes are fixed at quarter, half, three-quarter and full heights inside the tank.
- 2As the water rises it bridges the common probe and the next level probe.
- 3The small current through the water switches the corresponding transistor stage.
- 4Each transistor lights its indicator LED; the full-level stage also drives the buzzer.
- 5In the pump-control version the full stage opens the relay and the low stage closes it again.
Components used
- Stainless steel level probes
- BC547 transistor stages
- Indicator LEDs and buzzer
- Transparent demonstration tank
- Relay module (pump-control version)
- Regulated 12V supply
Questions about this project
Do the probes corrode over time?
Stainless probes driven at low current last well for demonstration use. If the project has to run continuously for weeks, the ultrasonic variant avoids contact with the water entirely.
Can it show the level as a percentage?
The probe version shows four discrete steps. If you need a continuous percentage on a display, choose the ultrasonic variant.
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Need the Water Level Indicator in Surat?
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