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COMPARISON TABLE

 

 

Sound Level Meter Data Logger with type 1 microphone | NSRT_mk4_Dev

The NSRT_mk4_Dev is a sound level meter with a dust-protected type I digital MEMS microphone and USB connectivity. This instrument is similar to the NSRT_mk4 in form, function and performance but is aimed at developers and OEMs.

For an open internet protocol, see NSRTW_mk4_MQTT

 

An optional Audio USB Interface is available for this product.

The NSRT_mk4 series is designed to work outdoors. Consult the Mounting Directions.

The Sound Level Meter Data Logger NSRT_mk4_Dev is similar to the NSRT_mk4 in form, function and performance, but has been redesigned with developers in mind. This instrument is designed to be used while connected to a host such as a Raspberry Pi. In such applications the NSRT_mk4_Dev is driven by a custom application. Such application can easily configure the instrument read its data in real-time, and perform other custom functions as intended by the developer. The NSRT_mk4_Dev cannot be used in standalone mode.

The main differences between the NSRT_mk4 and the NSRT_mk4_Dev are:
  • The NSRT_mk4_Dev does not have a battery. It is meant to be used while connected to a host and powered by the host’s USB port.
  • The NSRT_mk4_Dev does not have any non-volatile memory. It is intended to be connected to a host and driven by a custom application. Such application will use the host’s non-volatile memory as the situation requires.
  • The NSRT_mk4_Dev offers a Virtual Com Port interface (through its USB connection) for communication with the host. The communication protocol is open and documented.
  • The NSRT_mk4_Dev has been tested on Windows and Linux. It will work on any platform that provides a generic USB CDC-class driver.

 

The NSRT_mk4_Dev has an optional Audio USB Interface. Through that interface, the instrument is seen as a USB microphone, and its audio signal can be captured in real-time. Unlike a typical USB microphone, the audio signal that the instrument streams is weighted and calibrated in Pa.

Note: The Virtual Com Port interface, and the USB-Audio interface are not mutually exclusive. They can be used simultaneously.

Sound Level Meter Data Logger NSRT_mk4_Dev Applications

  • Sound level and acoustic dose measurement and recording.
  • Monitoring of safe working conditions.
  • 24/7 noise monitoring on construction sites.
  • Activity detection and logging.
  • Long-term measurement and recording of acoustic levels for environmental impact studies.
  • Specially designed for long-term outdoors applications.

Product Description

The Sound Level Meter Data Logger NSRT_mk4_Dev is similar to the NSRT_mk4 in form, function and performance, but has been redesigned with developers in mind. This instrument is designed to be used while connected to a host such as a Raspberry Pi. In such applications the NSRT_mk4_Dev is driven by a custom application. Such application can easily configure the instrument read its data in real-time, and perform other custom functions as intended by the developer. The NSRT_mk4_Dev cannot be used in standalone mode.

The main differences between the NSRT_mk4 and the NSRT_mk4_Dev are:
  • The NSRT_mk4_Dev does not have a battery. It is meant to be used while connected to a host and powered by the host’s USB port.
  • The NSRT_mk4_Dev does not have any non-volatile memory. It is intended to be connected to a host and driven by a custom application. Such application will use the host’s non-volatile memory as the situation requires.
  • The NSRT_mk4_Dev offers a Virtual Com Port interface (through its USB connection) for communication with the host. The communication protocol is open and documented.
  • The NSRT_mk4_Dev has been tested on Windows and Linux. It will work on any platform that provides a generic USB CDC-class driver.

 

The NSRT_mk4_Dev has an optional Audio USB Interface. Through that interface, the instrument is seen as a USB microphone, and its audio signal can be captured in real-time. Unlike a typical USB microphone, the audio signal that the instrument streams is weighted and calibrated in Pa.

Note: The Virtual Com Port interface, and the USB-Audio interface are not mutually exclusive. They can be used simultaneously.

Sound Level Meter Data Logger NSRT_mk4_Dev Applications

  • Sound level and acoustic dose measurement and recording.
  • Monitoring of safe working conditions.
  • 24/7 noise monitoring on construction sites.
  • Activity detection and logging.
  • Long-term measurement and recording of acoustic levels for environmental impact studies.
  • Specially designed for long-term outdoors applications.
  • Type I precision
  • A, C and Z weighting curves
  • Integrating Sound-Level Meter, provides LEQ and instantaneous exponentially averaged level “L” 
  • Individual manufacturer’s certificate of Calibration from Convergence Instrument provided with every instrument purchased
  • Digital very sensitive MEMS microphone (30 dBA typical noise floor)
  • Completely sealed weatherproof enclosure designed for outdoors applications. Now includes an ePTFE membrane that seals the microphone against dust and water
  • All-digital design
  • Open protocol
  • Ultra-stable sensitivity (field recalibration is easily done, but seldom required)
  • Very low sensitivity variation due to temperature changes
  • Very low sensitivity to vibrations
  • Adjustable response time
  • Can be used as a high-quality USB digital microphone (requires USB Audio Option)
  • Can be field-calibrated
  • Observes and records 100% of the acoustic signal (no missed samples)
  • Editable individual custom ID for easier instrument management
  • All settings are stored in non-volatile memory. So the instrument will regain full functionality from hard-reset or battery loss.

Specifications

Bandwidth

20 Hz to 20 kHz
Microphone Sensor

Digital MEMs
Precision Class

Complies with the precision requirements of IEC61672-2002 Type I
Saturation Level (typical @ 1 kHz)

120 dB-A, 120 dB-C, 120 dB-Z
Temperature Error

Better than 0.6 dB (-20°C < T < 60°C)
Sensitivity to Vibrations

60 dBSPL/g (20 dB lower than typical measurement microphone)
Weighting Curve

dB-A, dB-C, dB-Z
Noise-Floor (Typical)

30 dB-A, 46 dB-C, 52 dB-Z
Duty Rate of Signal Capture

100% – No Missed Samples
Calibration

Field-calibrated using a 94 dB 1/2” calibrator
Connectivity

USB: Virtual Com Port, Optional USB-Audio interface
Temperature Range

-20°C to 60°C (-4°F to 140°F)
Dimensions

19 mm x 42 mm x 160 mm – (0.75” x 1.65” x 6.25”)
Weight

50 g (0.1 lbs)
Construction

Weather-proof enclosure
Microphone Dust Protection

Expanded polytetrafluoroethylene (ePTFE) dust and water barrier
Protocol

Open and Documented

296.00 $

SKU NSRT_mk4_Dev-1 Category

Change Currency

Only 1 left in stock (can be backordered)

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Software Description Importance Download
Instrument Manager Universal Installer Instrument Management Software Essential Install BEFORE connecting the instrument
NSRT Directivity An application to show the frequency response and directivity pattern Optional
Raspberry Pi demo code Courtesy of Xander Hendriks Optional
NSRT_mk4 NSRT_mk4_Dev NSRTW_mk4 (Wireless)
Precision Class Type I Type I Type I
Connectivity USB-only USB-only USB & WiFi
Cloud Solution Compatibility No No Yes
Weighting Curves A, C, Z A, C, Z A, C, Z
Values measured Lpeak, Lmin, Lmax, LEQ L, LEQ Lpeak, Lmin, Lmax, LEQ
Recording of Acoustic Signal Included (USB-Audio option) Optional (USB-Audio option) Included (USB-Audio option)
Attachment System Wall or Tripod Mountable Wall or Tripod Mountable Wall or Tripod Mountable
Weight 3.3 oz
93 g		 50 g 3.3 oz
93 g
Data Non-Volatile N/A Non-Volatile
Settings Non-Volatile Non-Volatile Non-Volatile
Software Instrument-Manager
NSRT-Community-Noise-Metrics		 Instrument-Manager Instrument-Manager
Instrument-Listener
NSRT-Community-Noise-Metrics
Timer Yes No Yes
FFT Resolution (For Real-Time Display Only, Not Recording) 1024 points 1024 points 1024 points
Generic Audio Driver Support Included Optional Included
Generic Com Port Driver No Yes No
Platform Support Windows Windows, MacOS, Linux (and any platform that includes a generic USB CDC-class driver) Windows
Open Communication Protocol No Yes No
Rechargeable Battery Autonomy 7-Days (Recording) No Battery 7-Days (Recording)
Recording Memory 128 Mb No Memory 128 Mb
Compatible with cidatasolutions cloud service No No Yes