A data logger with an ultrasonic sensor is a device designed to collect, transmit, and log data using wireless communication networks to measure distance or detect objects, typically in non-contact applications.
The sensor emits high-frequency sound waves (typically above 20 kHz) toward an object or surface. The sensor measures the time taken for the echo to return after hitting the target. Using echo location with time-of-flight and the speed of sound, the device calculates the distance to the object or level of the material (e.g., liquid, waste, or soil). Many models are designed with IP-rated enclosures for outdoor use in harsh environments. A sensor array can also can include other sensors, such as temperature, humidity, or GPS, for added functionality.
There is a wide selection of use cases for this technology, some which are less obvious, such as production line counting, diameter measurement of rolls or predictive maintenance. Let’s take a look at just two:
Waste Management
- Fill Level Monitoring:
- Ultrasonic sensors measure the fill level of bins, containers, or underground waste systems.
- Sends alerts when bins are full, enabling optimized collection routes.
- Monitors liquid waste levels in landfill collection systems
Farming
- Irrigation Monitoring:
- Measures water levels in reservoirs or tanks, triggers irrigation systems when levels drop below a threshold.
- Tracks the fill levels of feed bins to ensure continuous feeding schedules for livestock.
- Data transmitted to farm management systems for automated reordering.
- Collision detection for tractors and trailers
- Can monitor soil moisture indirectly when paired with other sensors.
Benefits
- Non-Contact Measurement: Ideal for hazardous or difficult-to-reach environments.
- Remote Access: Operators can monitor conditions from anywhere.
- Scalability: Compatible with IoT platforms for large-scale deployment.
- Cost Efficiency: Reduces labor, fuel, and maintenance costs through automation.
Limitations
- Line-of-Sight Dependency: Ultrasonic sensors require an unobstructed path to the target.
- Temperature Sensitivity: Performance can be affected by extreme heat or cold, altering the speed of sound.
- Power Needs: Extended remote use may require efficient battery solutions or solar panels.
- Struggles with materials that absorb or scatter sound waves (e.g., foam or fabric).