The XL3 is a professional sound level meter and acoustic analyzer dedicated to noise measurements, room acoustics and building acoustics applications. The intuitive user interface is optimized for basic noise monitoring applications as well as offering extensive analysis tools for professionals. The sound level meter is fully networked and therefore allows operation and data access from any mobile device.
Class 1 Sound Level Meter
Spectrum Analyzer
Reverberation Time Analyzer
Sound Insulation Analyzer
STIPA Analyzer
Multi-language
Touch display
Single-range measurement
Integrated web server and file server
Web connectivity
8 hours battery life
Intuitive Operation in any Environment
Built for collaboration
High-Resolution Touch Display
The XL3 features a 4.3″ IPS color touch display (480 × 800) that presents readings in large, clear digits and enables fast, intuitive operation in the field. The high-resolution interface supports both quick checks and detailed analysis workflows with minimal navigation effort.
Customizable Interface Themes
Choose between white, blue, or black interface themes to match lighting conditions and personal preference, improving readability in bright daylight or low-light environments. This helps keep the UI consistent and comfortable during long measurement sessions.
Physical Control Buttons
A haptic keypad with eight physical buttons provides reliable access to common functions such as power on/off and start/stop measurement. This is particularly practical when working with gloves, in wet conditions, or when touch operation is less convenient.
Monitor and Control from Anywhere
Flexible setups
Web-Based Remote Access
An integrated web server and file server enables authorized users to control the XL3 and access data remotely via Wi-Fi or LAN from any standard browser. You can connect through NTi Connect or directly via the device IP on a local network – useful for building acoustics where measurements are started from a different room.
Continuous Data Download
Measurement files can be downloaded without interrupting an ongoing measurement, supporting efficient workflows during long-term monitoring. This keeps the instrument running continuously while stakeholders can already review and share interim results.
System Integration & Synchronization
The XL3 supports automatic time synchronization via NTP to ensure consistent time stamps across devices and measurement locations. Optional APIs allow integration into monitoring systems by retrieving current and historical noise, audio and weather data for automated processing and reporting.
Comprehensive Professional Analysis
Built to perform
Expandable Storage System
All measurement data is stored in an open TXT format on a removable 32 GB SD card, and storage can be expanded with larger SD cards or an external SSD. In addition, the XL3 can record audio alongside measurement data, which helps confirm events and support documentation.
Class 1 Accuracy and Broad Frequency Range
Configured with M2230 or M2340 microphones, the XL3 forms a Class 1 sound level meter for precise, standards-based measurements. High-performance sampling up to 96 kHz / 32-bit and a frequency range of 0.3 Hz to 40 kHz also support infra- and ultrasound investigations.
Multi-Function Acoustic Analyzer
Beyond sound level measurement, the XL3 supports spectrum analysis, reverberation time, sound insulation, and STIPA applications in one platform. This allows acousticians to use a single instrument across noise measurement, room acoustics, and building acoustics tasks.
Configurations
Sound Level Meter
XL3 Acoustic Analyzer + M2230
XL3 Acoustic Analyzer with M2230 Measurement Microphone (Class 1)
XL3 Acoustic Analyzer + M2340 (Type Approved)
XL3 Acoustic Analyzer with M2340 Measurement Microphone (Class 1, System Self-test (CIC))
Applications
The XL3 is the Perfect Solution for
Sound Level Monitoring
Monitor event SPL in real time to meet limits and protect hearing.
The heavy-duty outdoor case is a professional solution for short- and medium-term unattended noise monitoring. The case provides comprehensive protection…
Can I control the XL3 remotely and download data without stopping a measurement?
Yes. The XL3 includes an integrated web server and file server for browser based control via Wi Fi or LAN, and measurement data can be downloaded while the measurement continues. XL3 can also be remotely used to perform Building Acoustics measurement using Sound Insulation Reporter Software.
How does the XL3 store and export measurement data?
All measurement data is saved in an open TXT format on a removable 32 GB SD card and can be downloaded via USB C. Storage can be expanded with larger SD cards or an external SSD, and an audio signal can be recorded alongside the measurement.
Is the XL3 suitable for mobile device access?
Yes. The XL3 is fully networked and can be operated and accessed from mobile devices via a web browser.
What typical battery runtime can I expect from the XL3 and what factors influence it?
The XL3 typically provides up to 8 hours of battery life. Runtime depends mainly on factors like display brightness, active connectivity such as Wi Fi or LAN activity, logging and audio recording settings, and any connected peripherals.
Trusted by professionals worldwide.
As a research laboratory invested in supporting communities through real time noise monitoring, I am very happy to exclusively use NTi instruments. Not only are the robust, easy to use, and provide high quality data, the customer service is outstanding and their team will work with you to find the most cost effective and appropriate solutions needed for problems ranging from easy to difficult.
Erica D. Walker MSc, ScD, RGSS Assistant Professor of Epidemiology, Brown University School of Public Health
I’ve been using the XL2 for over 15 years for short-term and long-term measurements in all kinds of indoor and outdoor environments all across the country. The meter gets me what I want, when I need it. It’s not only the best value for acoustical measurements, it’s the best tool period. I bet my company and reputation on XL2 results and it has not let me down. You would be crazy not to consider adding NTi instruments to your toolkit.
Herb Singleton, P.E., INCE Bd. Cert., President, Cross-Spectrum Acoustics
We at Constructure GmbH use two XL3 sound level meters for noise monitoring during demolition work. We are very satisfied with these highly user-friendly instruments, the online monitoring in the MeasurEye Cloud, the good advice and qualified support. Factory calibrations at NTi Audio are also handled very smoothly and without complications.
Markus Rost, Managing Director, Constructure GmbH
News about XL3 Acoustic Analyzer
News & Updates
•
December 14, 2025
Pre-orders for the NL1 are now open – first batch availability is limited.
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