NBL-W-SNOW Ultrasonic Snow Depth Sensor

The NiuBoL NBL-W-SNOW Ultrasonic Snow Depth Sensor is designed for automatic and continuous measurement of snow accumulation in meteorological stations, transportation monitoring, airports, ports, agriculture, hydrology and environmental research.

The sensor uses 50 kHz ultrasonic ranging technology. It transmits an ultrasonic pulse toward the snow surface and measures the time required for the echo to return. By comparing the measured distance with the previously established reference distance to the ground surface, the monitoring system calculates the accumulated snow depth.

The standard NBL-W-SNOW provides RS485 communication, a measurement range of 0–1000 mm and automatic low-temperature heating. It is suitable for unattended outdoor snow monitoring and integration with weather-station data loggers, RTUs and IoT gateways.

NBL-W-SNOW Ultrasonic Snow Depth Sensor Technical Specifications

How an Ultrasonic Snow Depth Sensor Works

The NBL-W-SNOW determines snow depth without contacting the snow surface. The sensor is mounted above the ground and measures the distance between the ultrasonic transducer and the reflecting surface below.

Snow Depth = Reference Height − Current Distance to Snow Surface

Why Does the Snow Depth Sensor Have Automatic Heating?

Snow monitoring takes place under low-temperature conditions where frost, ice or accumulated snow around the ultrasonic transducer can interfere with acoustic transmission and reception.

The low-temperature heater increases power consumption significantly, so solar-powered snow-monitoring stations should size the panel and battery according to winter heating demand rather than the 180 mW normal-temperature consumption alone.

Snow Depth Sensor Installation Height and Reference Calibration

The current NBL-W-SNOW instructions specify a typical sensor installation position of approximately 1.3 m ±0.1 m above the reference surface. The exact installation should ensure that the expected snow accumulation remains within the sensor's 0–1000 mm measurement range.

RS485 Connection

Communication and System Integration

Integration note: The current NBL-W-SNOW manual states that the default communication uses the NBL private protocol. Do not automatically describe this model as standard Modbus RTU unless the supplied version has been configured or confirmed for Modbus communication.

Using NBL-W-SNOW in a Remote Snow Monitoring Station

NBL-W-SNOW → RS485 → Data Logger / RTU → 4G / Ethernet / LoRaWAN → Cloud or Private Server

Snow Depth Sensor Applications

What Snow Depth Data Can and Cannot Tell You

Ultrasonic Snow Depth Sensor vs Laser Snow Depth Sensor

Maintenance and Measurement Quality

NBL-W-SNOW Ultrasonic Snow Depth Sensor FAQ

Q1. What does the NBL-W-SNOW measure?

A1. It measures accumulated snow depth or snow thickness above a reference ground surface.

Q2. What is the measurement range?

A2. The standard documented snow-depth measurement range is 0–1000 mm.

Q3. What ultrasonic frequency does the sensor use?

A3. The NBL-W-SNOW uses approximately 50 kHz ultrasonic ranging.

Q4. Does the sensor touch the snow?

A4. No. It is a non-contact sensor installed above the snow surface.

Q5. Why does the snow sensor need heating?

A5. Heating helps reduce the influence of frost and icing around the ultrasonic sensing area during low-temperature operation.

Q6. Does it support RS485?

A6. Yes. The standard documented version provides RS485 communication with a default baud rate of 9600 bps.

Q7. Is the standard communication protocol Modbus RTU?

A7. The current product manual states that the default configuration uses the NBL private protocol. If Modbus integration is required, confirm the required protocol before ordering.

Q8. Can the NBL-W-SNOW measure snowfall?

A8. It measures snow depth rather than snowfall precipitation directly. Changes in snow depth can be monitored over time, but snow settling, melting and drifting also affect the depth measurement.

Q9. Can it calculate snow water equivalent?

A9. Not by itself. Snow water equivalent requires information about snow density or an appropriate dedicated measurement method.

Q10. Can snow-depth data be uploaded to our own server?

A10. Yes. The RS485 sensor can connect to a compatible data logger or IoT gateway, which can transmit the measurements to a cloud platform or private server using supported communication protocols.

NBL-W-SNOW Ultrasonic Snow Depth Sensor Datasheet

NBL-W-SNOW-Ultrasonic-Snow-depth-sensor-Manual4.0.pdf

NBL-W-SNOW for Automatic Snow Monitoring

The NBL-W-SNOW Ultrasonic Snow Depth Sensor provides non-contact 0–1000 mm snow-depth measurement for meteorological stations, roads, airports, agriculture and environmental monitoring. RS485 communication and automatic low-temperature heating make it suitable for unattended winter monitoring systems.

For quotation and system configuration, specify the installation height, maximum expected snow depth, power supply, cable length, required communication protocol, quantity and whether a data logger, solar power system or remote communication gateway is also required.