Ultrasonic level sensors
Ultrasonic level sensors measure how full a tank, well, channel or waste bin is without touching the contents. DWIN makes top-mounted sensors for water and bins, fuel level sensors for vehicle tanks, and sensors that read liquid level through the tank wall from outside.
14 models
14 models
Waste-Bin Fill Level Ultrasonic Sensor, Horn, RS485
- Range
- 28-250 cm
- Blind zone
- <=28 cm
Ultrasonic Well and Water-Level Sensor, Threaded, IP67
- Range
- 25-800 cm
- Output
- UART/ PWM
Waterproof Ultrasonic Sensor Family, Long-Range and Bin
- Range
- 25-800cm
- Accuracy
- ±(1+S×0.3%)
Waste-Bin Overflow Ultrasonic Sensor, Small Angle
- Range
- 25–200 cm
- Accuracy
- ±(1cm+S*0.3%)
Long-Range Ultrasonic Well Water-Level Sensor, 1000 cm
- Range
- 25–1000 cm
- Accuracy
- ±(1+S×0.3%) cm
External Ultrasonic Liquid Level Sensor, Analog Voltage
- Range
- 5-100 cm
- Accuracy
- ±(10+S*1%) mm
External Ultrasonic Liquid Level Sensor, RS485, 2 m
- Range
- 5-200 cm
- Accuracy
- ±(5+S*1%) mm
External Ultrasonic Liquid Level Sensor, UART/RS485, 3 MHz
- Range
- 4-200 cm
- Accuracy
- ±(5+S*1%) mm
External Ultrasonic Liquid Level Sensor, UART, Low Voltage
- Range
- 5-200 cm
- Accuracy
- ±(5+S*0.5%) mm
External Ultrasonic Liquid Level Switch Sensor
- Output
- Switch output
- Frequency
- 2 MHz
Low-Power External Ultrasonic Liquid Level Sensor, UART
- Range
- 2-200 cm
- Accuracy
- ±(5+S*0.5%) mm
NB-IoT Waste-Bin Overflow Terminal, Ultrasonic, GPS
- Range
- 25–200 cm
- Output
- NB-IoT
External Ultrasonic Fuel Level Sensor, Magnetic Mount, IP67
- Range
- 50-1000 mm
- Accuracy
- 1.0 %
External Ultrasonic Oil-Tank Level Detector, RS485
- Range
- 70–2000 mm
- Accuracy
- ≤5.0 mm
Compare Ultrasonic level sensors
| Model | Range | Output | Accuracy | Blind zone |
|---|---|---|---|---|
| A01-V2.1 Waste-Bin Fill Level Ultrasonic Sensor, Horn, RS485 | 28-250 cm | <=28 cm | ||
| A07-V1.0 Ultrasonic Well and Water-Level Sensor, Threaded, IP67 | 25-800 cm | UART/ PWM | 25 cm | |
| A08-V1.0 Waterproof Ultrasonic Sensor Family, Long-Range and Bin | 25-800cm | UART/PWM/switch | ±(1+S×0.3%) | |
| A13-V1.0 Waste-Bin Overflow Ultrasonic Sensor, Small Angle | 25–200 cm | UART output line | ±(1cm+S*0.3%) | 0–25 cm |
| A17-V1.0 Long-Range Ultrasonic Well Water-Level Sensor, 1000 cm | 25–1000 cm | ±(1+S×0.3%) cm | 0–25 cm | |
| DS1603AQ-V1.0 External Ultrasonic Liquid Level Sensor, Analog Voltage | 5-100 cm | Voltage analog | ±(10+S*1%) mm | |
| DS1603DA-V1.0 External Ultrasonic Liquid Level Sensor, RS485, 2 m | 5-200 cm | RS485 | ±(5+S*1%) mm | |
| DS1603DA-V2.0 External Ultrasonic Liquid Level Sensor, UART/RS485, 3 MHz | 4-200 cm | UART | ±(5+S*1%) mm | |
| DS1603L-V1.0 External Ultrasonic Liquid Level Sensor, UART, Low Voltage | 5-200 cm | UART | ±(5+S*0.5%) mm | |
| DS1603NF-V1.0 External Ultrasonic Liquid Level Switch Sensor | Switch output | ≤50 mm | ||
| L02-V1.0 Low-Power External Ultrasonic Liquid Level Sensor, UART | 2-200 cm | UART auto serial | ±(5+S*0.5%) mm | Self-adaptive mm |
| S02 NB-IoT Waste-Bin Overflow Terminal, Ultrasonic, GPS | 25–200 cm | NB-IoT | ||
| U02-V1.0 External Ultrasonic Fuel Level Sensor, Magnetic Mount, IP67 | 50-1000 mm | 1.0 % | ||
| U03-V1.0 External Ultrasonic Oil-Tank Level Detector, RS485 | 70–2000 mm | RS485 output | ≤5.0 mm |
How it works
A top-mounted sensor measures the distance down to the surface and subtracts it from the tank height. An external sensor is pressed against the bottom of the tank and sends ultrasound up through the wall and the liquid; the echo from the liquid surface gives the level without drilling the tank.
How to choose
- Mounting: top of tank, or outside the tank wall for sealed and pressurised vessels
- Medium: water, fuel, oil or solid waste
- Range, blind zone and beam angle for the tank shape
- Output and power: RS485, UART, 4 to 20 mA, or battery-powered IoT
Frequently asked questions
Can ultrasonic sensors measure level through a tank wall?
Yes. An externally mounted sensor couples ultrasound through metal, plastic or glass walls and measures the liquid column from below, so the tank is never opened or drilled.
How does a smart bin fill-level sensor work?
It is mounted under the bin lid, measures the distance to the waste and reports the fill percentage over NB-IoT, LoRa or another network so collection routes run only to bins that need emptying.