NBL-W-NS Environmental Noise & Sound Level Sensor

The NiuBoL NBL-W-NS Environmental Noise Sensor is designed for continuous sound-level monitoring in urban environments, industrial sites, construction areas, transportation infrastructure, parks, campuses and environmental IoT monitoring stations.

It measures environmental noise over a 30–130 dB range and a frequency range of 31.5 Hz to 8 kHz. A 0.5-inch condenser microphone converts acoustic pressure variations into electrical signals for continuous noise-level measurement.

The NBL-W-NS is available with RS485 Modbus RTU or 4–20 mA output, allowing integration with PLCs, RTUs, environmental data loggers, IoT gateways and remote monitoring platforms. Its IP65 enclosure makes it suitable for fixed environmental and industrial monitoring applications.

NBL-W-NS Noise Sensor Technical Specifications

Project selection note: If your project requires specific acoustic indicators, regulatory standards, calibration certificates or environmental-noise compliance requirements, provide the required specification before model selection so the appropriate configuration can be confirmed.

How the NBL-W-NS Environmental Noise Sensor Works

Environmental sound creates small changes in air pressure. The condenser microphone inside the NBL-W-NS detects these acoustic pressure variations and converts them into an electrical signal.

What Does the NBL-W-NS Measure?

The NBL-W-NS is designed for continuous environmental noise-level measurement. It provides a quantitative decibel value that can be recorded, displayed, transmitted or used by an external control system.

For environmental tenders requiring indicators such as LAeq, Lmax, Lmin, L10, L90 or octave-band data, provide the required measurement indicators and applicable standard before product selection.

Fixed Noise Sensor vs Portable Sound Level Meter

NBL-W-NS Dimensions and Sensor Structure

The NBL-W-NS uses a compact probe-style structure with a protective microphone windscreen for fixed monitoring installations.

RS485 Modbus Communication

The RS485 version is suitable for fixed environmental monitoring networks and can be integrated with compatible PLCs, RTUs, data loggers and IoT gateways.

RS485 Wiring

Wiring note: Confirm the selected output configuration before installation. RS485 and 4–20 mA versions should be connected according to the wiring supplied with the ordered sensor.

RS485 or 4–20 mA: Which Output Should You Choose?

Remote Noise Monitoring System

NBL-W-NS → RS485 / 4–20 mA → Data Logger / PLC → 4G / Ethernet / LoRaWAN → Cloud or Private Server

The NBL-W-NS provides the measurement signal. Data storage, automatic alarms, notifications and equipment control are implemented by the connected data logger, PLC, gateway or software platform.

Environmental Noise Sensor Applications

Noise Monitoring Station Integration

Noise monitoring is often combined with other environmental measurements to create a complete outdoor monitoring station.

Noise Sensor Installation Guidelines

Maintenance and Troubleshooting

NBL-W-NS Environmental Noise Sensor FAQ

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

A1. The NBL-W-NS measures environmental sound or noise level over a 30–130 dB measurement range.

Q2. What frequency range does the sensor cover?

A2. The specified frequency range is 31.5 Hz to 8 kHz.

Q3. What is the response time?

A3. The sensor uses a fast response with a specified time response of approximately 200 ms.

Q4. Does the NBL-W-NS support RS485 Modbus?

A4. Yes. An RS485 Modbus RTU version is available for connection to compatible PLCs, RTUs, data loggers and IoT gateways.

Q5. Is a 4–20 mA noise sensor available?

A5. Yes. The NBL-W-NS is available with 4–20 mA output for industrial analog data-acquisition systems. Confirm the required output when ordering.

Q6. Can the NBL-W-NS be used for outdoor noise monitoring?

A6. Yes. The sensor has an IP65 protection rating and can be used in fixed outdoor environmental monitoring installations when installed correctly.

Q7. Can the sensor trigger an alarm when noise exceeds a limit?

A7. The NBL-W-NS provides the noise measurement. A connected PLC, controller, data logger or monitoring platform can compare the value with a configured threshold and activate an alarm, relay or notification.

Q8. Can the sensor be used for LAeq or regulatory environmental-noise projects?

A8. Regulatory projects may specify acoustic indicators such as LAeq, Lmax, Lmin, L10 or L90 as well as specific certification and calibration requirements. Please provide the project specification before model selection so the required measurement configuration can be confirmed.

Q9. Can several NBL-W-NS sensors connect to one monitoring system?

A9. Yes. RS485 sensors can be integrated into a multi-device network when each device uses the correct communication settings and the RS485 bus and power supply are properly designed.

Q10. Can noise data be sent to our own server?

A10. Yes. A compatible data logger or IoT gateway can collect the sensor measurements and transmit them to a cloud platform or private server through supported communication protocols.

NBL-W-NS Noise Sensor Datasheet

NBL-W-NS-Noise-Sensor-Instruction-Manual.pdf

NBL-W-NS for Environmental and IoT Noise Monitoring

The NBL-W-NS Environmental Noise Sensor provides continuous 30–130 dB noise-level measurement for urban, industrial, construction and environmental monitoring applications. RS485 Modbus and 4–20 mA output options allow integration with fixed monitoring stations, PLC systems and remote IoT networks.

For quotation and model selection, specify the required output signal, acoustic indicators required by the project, installation environment, cable length, quantity, calibration or certification requirements and the data logger, PLC or platform that will receive the measurements.