Wireless Sound Level Meter Data Logger

Product Description

The Wireless Sound Level Meter Data Logger NSRTW_mk3 is the third generation of Convergence Instrument’s WiFi™ enabled smart integrating sound-level meters/dataloggers. It includes a digital MEMS microphone, an accurate date/time clock, a non-volatile 128 Mb recording memory and wireless connectivity.

Running on battery, it can record sound pressure levels and report them through WiFi™ for a week. Connected to an external USB charger it can record and report for months. It’s very small size allows it to be attached to or embedded within the monitored equipment.

Every Wireless Sound Level Meter Data Logger NSRTW mk3 purchased is provided with an Individual Manufacturer’s Certificate of Calibration from Convergence Instruments. This all-digital design includes the A, C and Z weighting curves. It is enclosed in a completely weatherproof casing which is designed for indoors and outdoors applications. Its highly sensitive Type 1 MEMS microphone has a noise floor of 30 dB-A and is ultra stable with time and temperature variations. The software includes an oscilloscope and spectrum analyzer features, as well as email alarms.

Mounting Base and Tripod Adapter are included.

Wireless Sound Level Meter Data Logger NSRTW_mk3 Applications

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

NSRTW MK3 dans base


NSRTW MK3 face angle



Bandwidth20 Hz to 20 kHz
Microphone SensorDigital MEMs
Precision ClassComplies with the precision requirements of IEC61672-2002 Type I
Saturation Level (typical @ 1 kHz)120 dB-A, 120 dB-C, 120 dB-Z
Temperature ErrorBetter than 0.6 dB (-20°C < T < 60°C)
Sensitivity to Vibrations60 dBSPL/g (20 dB lower than typical measurement microphone)
Weighting CurvedB-A, dB-C, dB-Z
Noise-Floor (Typical)30 dB-A, 46 dB-C, 52 dB-Z
Recording Resolution0.1 dB
Duty Rate of Signal Capture100% – No Missed Samples
Min Log Interval125 ms (8 points of Lmin, Lmax and LEQ per second)
Real-Time Spectral Display2048-Point Power Spectrum – dB or Lin Scale.
CalibrationField-calibrated using a 94 dB 1/2” calibrator
ConnectivityUSB, WiFi
Radio StandardIEEE 802.11 b/g/n
Radio CertificationFCC, IC, Japan, Korea, CE
Battery TypeIntegral Li-Poly – USB-Rechargeable
Recharge Time2 h 30 (Typical)
Battery Autonomy (Full-Charge)7 days while recording (WiFi operation will drain battery slightly more, depending on the rate of connect)
Battery Life> 300 Charge/Discharge Cycles
Temperature Range-20°C to 60°C (-4°F to 140°F)
Recording Memory TypeNon-Volatile Flash Memory
Recording Memory Capacity128 Mb, Ex: can continuously record Lmax, Lmin and Leq levels at 1s intervals for 32 days, or 10s intervals for 320 days.
Recording/Erasure CyclesGreater than 100 000
Data RetentionGreater than 20 Years
Dimensions19 mm x 42 mm x 160 mm – (0.75” x 1.65” x 6.25”)
Weight100 g (0.1 lbs)
ConstructionWeather-proof enclosure
Microphone Dust ProtectionExpanded polytetrafluoroethylene (ePTFE) dust and water barrier
WiFi SecurityOpen, WEP, WPA / WPA2
Server ConnectionIP address/Domain Name
ProtocolTCP/IP – Open protocol

Download NSRTW_mk3_Data_Sheet Geonoise Asia, noise monitoring

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