Measurement Microphones

NTi Audio Measurement Microphone
A range of measurement microphones are available to suit your requirements. The measurement microphones combine with the XL2 for a comprehensive sound level meter and acoustic analyzer.

The microphones are 48V phantom powered and include an electronic data sheet. The Automated Sensor Detection (ASD) of the XL2 Analyzer automatically reads this data, i.e. the microphone model and calibration data. This promotes faster setup and ensures accurate measurements.

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Weather Protection

Microphone Weather Protection
Protect your measurement microphone from rain, wind, dust and perching birds with a professional outdoor weather protection kit. The corrosion-free polymer housing, windscreen, water-repellent membrane and bird spike provide excellent protection from rain, wind, dust and perching birds. A weather protection is dedicated for precise acquisition of environmental noise data in outdoor applications.

There are three types available. The WP30 Weather Protection with two different sizes of windscreens (90 mm and 150 mm) is dedicated for the ½” measurement microphones M2230 and M2340. On the other hand the WP61 Weather Protection is designed for the ¼” measurement microphone M4261. An outdoor measurement microphone consists of a measurement microphone and a weather protection.

NTi Audio #:
  • WP30-90: 600 040 060 (without microphone)
  • WP30-150: 600 040 090 (without microphone)
  • WP61: 600 040 080 (without microphone)

Product Data  |  Manual

Assembly Tutorial for WP30-90 or WP30-150




Pole Mount Adapter


The outdoor measurement microphone may be installed on a pole using an adapter. The microphone is connected to the sound level meter by the ASD cable, which runs through the pole and the adapter to the microphone. The adapter is available in two different sizes.


NTi Audio #:
  • Pole Mount Adapter PM 1": 600 040 067
    supports pole diameter 25 - 33 mm (1-1.3")
  • Pole Mount Adapter PM 1 1/4": 600 040 068
    supports pole diameter 32 - 44 mm (1.25-1.75")


Windscreen 90 mm
Enhance the audio recording experience with our windscreen solution. Our windscreen was designed to minimize noise caused by turbulence in windy environments and protects the microphone and preamplifier from dust, bumps, and shocks.

NTi Audio #:

  • 1/2" Windscreen 50 mm: 150 000 026
  • 1/2" Windscreen 90 mm: 600 040 109  


Dehumidifier for M2230-WP
The Dehumidifier protects the microphone capsule from possible water damage caused by condensation due to high humidity. This provides reliable and precise measurements in changing environmental conditions. The Dehumidifier is an accessory for the outdoor measurement microphone M2230-WP (= M2230 with WP30) and M2340-WP (= M2340 with WP30).

NTi Audio #: 600 040 063

Product Data

Class 1 Sound Calibrator

Precision Calibrator 94/114 dB
The battery-operated Class 1 Sound Calibrator is classified for the calibration of class 1 measurement microphones, sound level meters and other acoustic measurement equipment. This precision microphone calibrator delivers 94 or 114 dB at a frequency of 1 kHz.

NTi Audio #: 600 000 388

Product Data

Add the "1/4" Calibration Adapter" to fit 1/4” measurement microphones into the Class 1 Sound Calibrator. NTi Audio #: 600 000 391

Class 2 Sound Calibrator

Klasse 2 Kalibrator
The battery-operated Class 2 Sound Calibrator is classified for the calibration of class 2 measurement microphones, sound level meters and other acoustic measurement equipment. This microphone calibrator delivers 114 dB at a frequency of 1 kHz.

NTi Audio #: 600 000 394

Product Data

Ever-ready Pouch

Ever-ready Pouch
The Ever-ready Pouch protects the XL2 during transport and operation. With its convenient belt-clip, the XL2 can be kept close by for those tasks requiring both hands. The Ever-ready Pouch allows operation of the XL2 fitted in the pouch.

NTi Audio #: 600 000 335

Mains Power Adapter

Mains Power Adapter
Mains Power Adapter with removable plug types. It suits the typical power sockets in Australia, China, Europe, Japan, US and UK; 100-240 VAC.
(Non-original power supplies may cause interferences with the measurement.)

NTi Audio #: 600 000 333

Battery Charger

Battery Charger
The Battery Charger efficiently recharges the spare battery whilst you are using your XL2 Audio and Acoustic Analyzer. One spare Li-Po battery is included with the battery charger.

NTi Audio #: 600 000 332

ASD Cable

ASD Cable
The ASD Cable allows for extended connections of the NTi Audio measurement microphones. It supports the transfer of the electronic data sheet from the microphone to the XL2 Analyzer.

NTi Audio #:
  • 5 meter (16 feet): 600 000 336
  • 10 meter (32 feet): 600 000 364
  • 20 meter (64 feet): 600 000 365

The ASD technology offers the electronic data sheet transfer for cable length until 20 meter (64 feet).

ASD Flat Ribbon Cable 1m

ASD Cable flat
Microphone cable for passing closed windows or doors. It supports the transfer of the electronic data sheet from the microphone to the XL2 Analyzer.

NTi Audio #: 600 000 367


Ball Head Mount

NTi-Audio Head Ball Mount

This flexible universal joint mounts the XL2 on a 1/4" or 3/8" stand. It provides the facility to mount the XL2 at any angle.

NTi Audio #: 600 000 387
Americas #: 600 000 373

A 5/8" stand requires additionally the Mounting Adapter, # 600 000 372.

Mounting Adapter

XL2 Mounting Adapter
This mechanical adapter piece mounts the XL2 on a microphone stand. Adapters for 3/8" or 5/8" stands are included.

International #: 600 000 372

Lightweight Tripod

Lightweight Tripod

Retractable, lightweight tripod with 1/4" ball head and 3/8" mounting thread. The flexible ball head mounts the XL2 Analyzer at any angle. The tripod is suitable for all measurement microphones, the outdoor microphone and the TalkBox.

Height: 115 - 140 cm, 45 - 55"
Weight: 1.4 kg, 50 oz
Folded: 11 x 8 x 56 cm, 4" x 3" x 22"
Unfolded area: 80 x 80 cm, 32" x 32"

NTi Audio #: 600 000 397

Limit Light

SPL Stack Light
The XL2 Sound Level Meter in combination with this Limit Light offers a turnkey solution for live sound monitoring.  The Limit Light provides a pre-warning with an orange light and indicates that levels have been exceeded with a red light. The sound level limits are set in the XL2.

NTi Audio #: 600 000 600

Product Data

Stack Light

SPL Stack Light
The XL2 Audio and Acoustic Analyzer in combination with this Stack Light provides a turnkey solution for noise level monitoring or pass / fail measurements where a prominent visual indication is required.

The Stack Light connects directly to the XL2 Analyzer and shows the actual measurement result with three different colors; green, orange and red.

NTi Audio #: 600 000 610

Product Data


The NetBox connects the XL2 Sound Level Meter to the internet for unattended noise monitoring. It transfers the measurement data to the fully-managed NoiseScout Web Portal (Managed Mode) in real time or provides a secure internet FTP access to the instrument (Gateway Mode). The noise monitor may be connected via 4G, 5G, LAN or Wi-Fi (an external modem is required for 4G/5G).

NTi Audio #:
  • NetBox (LAN & Wi-Fi ready): 600 000 450
  • 4G/LTE Gateway for NetBox: 600 076 011
    (worldwide exluding Americas, China, Japan)
  • 4G/LTE Router for NetBox: 600 076 012


Data Credits:
  • NoiseScout 365: 600 000 437
    (annual subscription service)
  • 30 Days: 600 000 490
  • 100 Days: 600 000 491
  • 366 Days (1 year): 600 000 492
  • 1096 Days (3 years): 600 000 493
Product Data

Live Demo:

NoiseScout - Gateway Mode
Password: gwdemo1409

NoiseScout - Managed Mode

4G/LTE Gateway for NetBox

4G LTE Gateway
The 4G/LTE Gateway is a small, lightweight, and energy-efficient industrial gateway equipped with mission-critical LTE capabilities, Gigabit Ethernet interface, digital Inputs/Outputs, and micro-USB port.

This 4G/LTE Gateway has been specially selected for use with the XL2 Sound Level Meter. It connects XL2+NetBox to the internet for remote monitoring of noise levels.


NTi Audio #:

  • 4G/LTE Gateway for NetBox: 600 076 011
    (worldwide exluding Americas, China, Japan)
  • 4G/LTE Router for NetBox: 600 076 012

Product Data

Input Keypad

XL2 Input Keypad
The Input Keypad offers four marker keys to trigger an event recording or categorize any noise during measurements. A typical application is the subjective categorizing of any annoying industrial noise by persons living in the neighborhood. The XL2 Analyzer connects directly to the XL2 Input Keypad. (requires Extended Acoustic Pack Option installed on your XL2)

NTi Audio #: 600 000 384

Product Data

Digital I/O Adapter PCB

Digital I/O Adapter PCB
The XL2 Analyzer together with the Digital I/O Adapter controls external peripherals, such as a big red-orange-green lamp displaying exceeding sound levels. The Digital I/O Adapter connects to the digital I/O interface of the XL2 Analyzer.

NTi Audio #: 600 000 380

Product Data

Weather Station

Weather Station
Rain, strong wind and the wind direction can influence the outdoor sound pressure level to be measured. Connect a weather station to your noise measurement station to simultaneously record the noise level and the weather data. Depending on the weather station model used, air pressure, temperature, air humidity, rain, wind speed and wind direction are documented. NoiseScout supports the Vaisala models WXT532, WXT533 and WXT536.

Order Information

  • Weather Station WXT532
    (wind speed, wind direction)
    NTi Audio #: 600 000 736
  • Weather Station WXT533
    (wind speed, wind direction, rain fall)
    NTi Audio #: 600 000 737
  • Weather Station WXT536
    (wind speed, wind direction, rain fall, temperature, air pressure, humidity)
    NTi Audio #: 600 000 738
  • Over-voltage Protection for Weather Station
    NTi Audio #: 600 000 739

Product Data  

System Case

Exel System Case
This compact system case provides the professional transport protection for work in the field. It offers space for the handheld instruments, cables and connectors.

NTi Audio #: 600 000 701


The backpack provides the professional transport protection for work in the field. It offers space for the handheld instruments and accessories.

NTi Audio #: 600 000 342

Basic Outdoor Case

Basic Outdoor Case
The Basic Outdoor Case is a simple and efficient solution for outdoor noise monitoring. Powered either by an external mains supply or a small, high capacity battery pack the case is more than adequate for a number of days of monitoring. The robust and lightweight design protects the Sound Level Meter and accessories from a wide range of inclement weather conditions.

NTi Audio #:
  • IP43: 600 000 471
  • IP63: 600 000 473

Heavy Duty Outdoor Case

XL2 Outdoor Case

The heavy duty outdoor case is a professional solution for short- and medium term unattended noise monitoring. The case provides comprehensive protection against dust, water and impacts. Internal dimensions provide ample space for battery packs to power the Sound Level Meter.

NTi Audio #:

  • IP43: 600 000 476
  • IP65: 600 000 477
Product Data

Tracer Battery Adapter Cable

Tracer Battery Adapter
The Tracer Battery Adapter Cable connects the Tracer battery pack to a NetBox or an XL2 Analyzer. It ensures that the connected instruments start up properly if the battery has been completely discharged.

NTi Audio #: 600 000 478

Product Data

GPS Receiver (customized)

GPS Receiver
The specially adapted GNSS receiver comes with a built-in active antenna in a white housing. It connects to the XL2 Sound Level Meter and the NetBox. Typical applications are to synchronize the start time of one or multiple XL2s precisely with the GPS signal (+/- 0.7 ms) or presenting the precise instrument position in NoiseScout Gateway mode for unattended noise and vibration monitoring. The GNSS receiver supports Galileo, GPS and other systems.

NTi Audio #: 600 000 357

Product Data

Weatherproof Enclosure for Noise Monitoring Terminal

Noise Monitoring Terminal

The weatherproof enclosure is the tailored fixed installation solution for unattended noise monitoring. The enclosure is IP66 (without ventilation) or IP55 (with built-in fan) rated, highly secure and constructed of strong, hard-wearing reinforced fiberglass.

NTi Audio #:

  • Enclosure Large, IP55: 600 000 480
  • Enclosure Large, IP66: 600 000 486
  • Enclosure Compact, IP66: 600 000 485

Product Data

Microphone PreAmplifier

MA220 Microphone PreAmplifier
The MA220 and MA230 offer a low noise microphone preamplifier compatible with standardized 1/2" microphone capsules. Both include an electronic datasheet for fast setup and ensuring accurate measurements. The MA230 is additionaly enabled for periodic self-tests (Charge Injection Check CIC) dedicated for permanent noise monitoring stations.

NTi Audio #:
  • MA220: 600 040 040
  • MA230: 600 040 200

XLR Adapter ASD

XLR male/female Adapter with electronic data sheet for automated sensor detection (ASD) of other sensors. The adapter is available in two variations: The type ASD-2 is used for measurement microphones with isolated housing ground connection and the type ASD for induction loop and other sensors.

NTi Audio #:
  • XLR Adapter ASD: 600 000 383
  • XLR Adapter ASD-2: 600 000 385
Product Data

ICP Adapter ASD

The ICP Adapter connects to the XL2 and generates ICP power supply for accelerometers and other custom sensors. The adapter offers an electronic data sheet, which stores the sensitivity and individual serial number of the connected sensor.

NTi Audio #: 600 010 223

Product Data

SD Card 32GB

SD Card
The XL2 requires an SD card that can continuously and simultaneously store many data streams. Unfortunately, many cards available on the market are known to interrupt the read/write process for periods of more than 10 seconds. This leads to data loss in the XL2. These interruptions can occur regardless of the speed rating of the card. Even cards of the same type and from the same vendor behave differently depending on the production date. Therefore, to ensure the integrity of the XL2 data recording, NTi Audio verifies every single card over a period of several days before the card is sent to our customer. Requires XL2 Firmware V4.10 or higher.

NTi Audio # 600 000 386


Vibration Sensor

A range of uniaxial piezoelectric accelerometers is offered for analyzing the vibrations of devices under test. These may range from slight excursions up to strong impacts. The accelerometers can be mounted either with a screw or a magnet depending on the type selected.

NTi Audio #:

  • Accelerometer A4580: 600 010 349
  • Accelerometer KS901MF: 600 010 347
  • Accelerometer A97100: 600 010 352

Product Data

Manufacturer Calibration Certificate

Manufacturer Calibration Certificate

The calibration certificate lists the individual product data with serial number. The calibration and adjustment procedures follow the documentation and traceability requirements of the EN ISO / IEC 17025 standard.

Annual re-calibration of the instrument after the purchase is recommended ensuring accurate measurements.

NTi Audio #: 600 000 018

Sample Manufacturer Calibration Certificates:

Get more Information

Contact us for a quotation or to discuss your measurement application.

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