Sound level meter

NL-63

Class 1 Sound level meter for infrasound

The NL-63 Class 1 sound level meter is designed for demanding infrasound applications where reliable, standards-compliant data is essential. With dedicated low-frequency capability from 1 Hz and advanced analysis functions, it is a strong choice for environmental noise assessments such as wind turbine noise monitoring.

The NL-63 is equipped with a dedicated infrasound microphone, enabling precise measurements from 1 Hz. This makes the instrument suitable for projects where low-frequency noise and infrasound are critical parameters, including:

Wind turbine noise assessments
Environmental impact studies
Infrastructure and industrial noise monitoring

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Sound Level Meters from Rion

Explore the possibilities of noise measurement

This video demonstrates the three different sound level meters from Rion.

You'll see:

NL-43, a Class 2 sound level meter
NL-53, a Class 1 sound level meter
NL-63, a Class 1 sound level meter,
with low-frequency sound measurement function

Accurate low-frequency assessment with G-weighting

To ensure that infrasound and low-frequency noise are evaluated correctly, the NL-63 includes G-weighting functionality. This weighting filter is specifically designed for infrasound assessment, to:

Characterize low-frequency noise more reliably
Align your measurements with recognized evaluation practices
Improve the quality and interpretability of reported data

Consistent communication and workflow integration

Sharing the same communication functionality as the NL-53 within the same product series, the NL-63 integrates smoothly into existing workflows and monitoring setups. This allows you to:

Use familiar interfaces and data handling routines
Simplify training and deployment across teams
Combine the NL-63 with other instruments in a coordinated measurement strategy

For wind turbine and environmental noise applications

The NL-63 is a reliable instrument for long-term and project-based measurements in fields such as:

Wind turbine noise measurements
Environmental compliance monitoring
Research and consultancy work focused on low-frequency and infrasound noise

Features

Standards

Options

Downloads

Features

IEC 61672 Class 1 Integrating Sound Level Meter
Octave/third octave
Capable of infrasound from 1 Hz
Wav file recording
FFT
Full-fledged LAN interface
Data stored as CSV file to a memory card for easy import into Excel
Outdoor protection kit options
Touch panel screen

Standards

IEC 61672-1:2013 class 1
ANSI/ASA S1.4-2014/Part 1 class 1
JIS C 1509-1: 2017-calss 1
JIS C1516: 2020 class 1

Options

NX-43EX Extended function program

The NX-43EX module unlocks advanced functionality, including instantaneous value logging, trigger-based measurements, comparator operation, LAN connectivity, and noise event tagging for traceable documentation. The NX-43EX must be installed before integrating the NX-43WR, NX-43RT, and NX-43FT modules into your measurement system.

NX-63RT Octave, 1/3 octave band analysis program

NX-63RT is real-time octave and 1/3 octave band analysis program that is capable of frequency of infrasound.


1/3 Octave band analysis	NC curve evaluation	Graph overlay

NX-43FT FFT analysis program

NX-43FT is FFT(Fast Fourier Transform) analysis program.


FFT analysis display	Top 20 peak list

NX-43WR Waveform recording program

Record detailed noise waveforms for reliable playback and post-analysis.
Use event-triggered recording to capture only noise events that exceed a preset threshold, optimizing storage and review time.
Post-process recorded noise data with the AS-70 waveform analysis software, converting time-domain signals into:
FFT spectra for frequency-domain analysis
Octave and 1/3-octave band analysis with user-defined settings and preferences.

Downloads for NL-53