What is an ultrasonic water level sensor?
An ultrasonic water level sensor is a non-contact device that measures the height of water in a tank, reservoir, or open channel by using ultrasonic sound waves.
Key features include:
- Non-contact – nothing touches the water, so there’s no risk of contamination or corrosion.
- Works with clean or dirty water – suitable for reservoirs, rivers, sumps, and sewage treatment.
- Continuous measurement – gives real-time data rather than just a high/low alarm.
- Integrates with control systems – can send analogue signals (e.g. 4–20 mA), digital outputs, or connect via MODBUS/IoT.
How does an ultrasonic water level sensor work?
- The sensor (mounted above the water surface) emits a short burst of ultrasonic pulses.
- These pulses travel through the air, reflect off the water surface, and return to the sensor.
- The sensor measures the time delay between sending and receiving the echo.
- Using the speed of sound in air, the device calculates the distance to the water surface.
- Knowing the tank’s dimensions (or reference point), the system converts this into a water level reading.
What are typical applications for a ultrasonic water level sensor?
- Monitoring water levels in storage tanks, silos, and sumps.
- Flood warning systems in rivers, canals, or drainage systems.
- Wastewater treatment plants for managing inflow/outflow.
- Irrigation systems to track reservoir levels.
- Hydroelectric plants to monitor dam and reservoir levels.
Need more information about ultrasonic water level sensors?
Contact Deeter today for further support on ultrasonic water level sensors.