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Technical Specifications
| Measured Variable | Level / Object level |
| Measuring Range |
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| Dead Zone | 0.3 m |
| Accuracy | ±0.5% FS |
| Resolution | 1 mm |
| Communication Output | RS485, Modbus-RTU protocol |
| Supply Voltage | 3.6–18 VDC / 12–24 VDC |
| Standby Sleep Current | < 10 μA |
| Power Consumption per Measurement | 11 μAh @ 5 V supply |
| Electrical Connection | PG7 cable gland |
| Operating Temperature | −20 to 80 °C |
| Ambient Humidity | ≤ 90% RH, non-condensing |
| Ingress Protection | IP68 |
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Applications
The low power ultrasonic level transmitter is widely used for liquid and material level measurement in the following fields:
Drainage Systems
Sewage pipelines, pump stations, and manholes
Water Conservancy & Hydrology
Rivers, lakes, reservoirs, and water level monitoring stations
Municipal Utilities
Urban water supply, wastewater treatment plants, and rainwater monitoring
Environmental Protection
Monitoring water levels in environmental management systems
Water Management
Reservoirs, channels, and storage tanks
Industrial Applications
Liquid level measurement in industrial tanks, vessels, and containers
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Measuring principle
The ultrasonic level transmitter operates based on the propagation and reflection of ultrasonic waves in air.
When the ultrasonic transducer emits an ultrasonic pulse toward the liquid surface, the sound wave is reflected back upon reaching the surface. The reflected signal is received by the same transducer and converted into an electrical signal. By measuring the time difference between transmission and reception, and using the known speed of sound in air, the distance between the sensor and the liquid surface is calculated.
Based on the installation height and the measured distance, the liquid level is determined accurately.
Key parameters in measurement:
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BD: Blind zone distance
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H: Installation height
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F: Measuring range
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D: Distance from transducer surface to liquid surface
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L: Liquid level
