Measurement Microphones

NTi Audio Measurement Microphone
A range of measurement microphones are available to suit your requirements. The measurement microphones combine with the analyzer 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 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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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

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

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

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 analyzer and generates ICP power supply for 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

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 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 Analyzer.

NTi Audio #: 600 000 367

USB-C to LAN Adapter

This USB-C to LAN Adapter allows you to easily access your network with full high-speed internet.

NTi Audio #: 600 000 535 

Tracer Battery Adapter Cable

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

NTi Audio #: 600 000 478

Product Data

Ball Head Mount

NTi-Audio Head Ball Mount

This flexible universal joint mounts the device on a 1/4" or 3/8" stand. It provides the facility to mount the analyzer 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 analyzer 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 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

4G/LTE Gateway

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 Sound Level Meter. It connects the analyzer to the internet for remote monitoring of noise levels.


NTi Audio #:

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

Product Data

GPS Mouse

GPS Mouse for XL3
The GPS Mouse for the XL3 enhances the reports of the device with ac­curate location and timing data. It features impressive sensitivity and compatibility with multiple satellite systems. Upon successful position fix, the top LED initiates a flashing indicator. Easy mounting is facilitated by a bottom magnet, with optimal performance achieved when the LED side faces the open sky.


NTi Audio #: 600 000 358

Product Data  

Ever-ready Pouch

Ever-ready Pouch
The Ever-ready Pouch protects the XL3 during transport and operation. With its convenient belt-clip, the XL3 can be kept close by for those tasks requiring both hands. The Ever-ready Pouch allows operation of the XL3 fitted in the pouch.

NTi Audio #: 600 000 735

Screen Protection

Screen Protection for the XL3 Sound Level Meter

The Screen Protection protects the XL3 Screen during use and operation. 

NTi Audio #: 600 000 744

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 #: 600 000 706

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: 600 000 704
  • IP65: 600 000 705
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 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

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: