Sound Level Meter Data Logger for Long Term Outdoors Applications | Noise Sentry RT

306.00 $ USD

In stock (can be backordered)

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Product Description

The Sound Level Meter Data Logger Noise Sentry RT is a new generation of smart integrating sound level meter data logger. It includes a digital MEMS microphone, an accurate date/time clock and a non-volatile 128 Mb recording memory. It can record sound pressure levels autonomously for a week. Connected to an external USB charger it can record for months. Its very small size allows it to be attached to or embedded within the monitored equipment.

Every Sound Level Meter Data Logger Noise Sentry RT Purchased is provided with an Individual Manufacturer’s Certificate of Calibration from Convergence Instruments. This all-digital design includes the A and C weighting curves. It is enclosed in a completely weatherproof casing which is designed for indoors and outdoors applications.. Its highly sensitive MEMS microphone has a noise floor of 31 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.

Sound Level Meter Data LoggerApplications

  • Sound level and acoustic dose measurement and recording
  • Monitoring of safe working conditions
  • Activity detection and recording
  • Long-term measurement and recording of acoustic levels for environmental impact studies
  • Specially designed for long-term outdoors applications

Related Software Description

  • Big Display is an application for libraries, hospitals, etc. To let the public know that the noise level is too high. (.jpg picture can optionally be provided by the user.
  • bigdisplay1 bigdisplay2
  • NSRT Community Noise Metrics is an application to calculate standard noise metrics from data recorded by the Noise Sentry RT. The calculated metrics include CNEL, Lden, N70 and 8 others, in addition to the Sound-Exposure Levels of events and percentiles.



Weight 0.1 lbs
Dimensions 4.5 x 3.5 x 3 in

25 Hz to 8 kHz

Microphone Sensor

Digital MEMs

Precision Class

Type II

Saturation Level (typical @ 1 kHz)

117 dB-A, 114 dB-C

Weighting Curve

dB-A, dB-C

Noise-Floor (Typical)

31 dB-A, 40 dB-C

Recording Resolution

0.1 dB

Temperature Error

Better than 0.1 dB (0°C < T < 60°C), Better than 0.5 dB (-20°C < T < 60°C)

Sensitivity to Vibrations

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

Duty Rate of Signal Capture

100% – No Missed Samples

Real-Time Spectral Display

512-point Power Spectrum – dB or Lin Scale.


Field-calibrated using a 1/2" calibrator



Internal Battery Type

Integral Li-Poly – USB-Rechargeable

Recharge Time

2 h 30 (Typical)

Internal Battery Autonomy (Full-Charge)

7 days while recording

Internal Battery Life

> 300 Charge/Discharge Cycles

Temperature Range

-20°C to 60°C (-4°F to 140°F)

Recording Memory

Non-Volatile Flash Memory

Recording Memory Capacity (RT128 Model)

128 Mb, Ex: can continuously record Lmax, Lmin and Leq levels at 1s intervals for 32 days, or 10s intervals for 320 days.

Recording/Erasure Cycles

Greater than 100 000

Data Retention

Greater than 20 Years


Integrally Potted Weather-Proof ABS Enclosure


7.62 x 3.94 x 5.9 cm

  • Individual Manufacturer’s Certificate of Calibration from Convergence Instruments provided with every instrument purchased
  • Digital very sensitive MEMS microphone (31 dBA typical noise floor)
  • Completely sealed weatherproof enclosure designed for outdoors applications
  • All-digital design
  • Ultra stable sensitivity (field recalibration is easily done, but seldom required)
  • Very low sensitivity variation due to temperature changes
  • Very low sensitivity to vibrations
  • A and C weighting curves
  • Integrating Sound-Level Meter, records L-max, L-min and Leq levels
  • Software function calculates global Leq and/or dose, according to ISO and OSHA methods
  • Adjustable response time
  • Preprogrammed recording start date/time
  • Integrated oscilloscope function that can show the acoustic signal in real time
  • Integrated spectral analyzer function that can show the spectrum (or 3rd-octave bands) in real time
  • Can send alarms and emails while connected to a PC
  • Allows the observation of recorded levels while the recording is ongoing
  • Works standalone, or USB connected for setup and data transfer to PC
  • Long life internal rechargeable battery that recharges from USB and most USB chargers
  • Can be field-calibrated
  • Observes and records 100% of the acoustic signal (no missed samples)
  • Editable individual custom ID for easier instrument management
  • LabVIEW driver available
Noise Senrty RT Noise Sentry RT-W (Wireless) Noise Sentry RT-P (Personal)
Precision Class Type II Type II Type II
Rechargeable Battery Autonomy 7 Days (Recording) 7 Days (Recording) 7 Days (Recording)
Connectivity USB USB & wiFi USB
Attachment System Wall or Tripod Mountable Wall or Tripod Mountable Worn on Clothes
Weight 3.6 oz
103 g
3.3 oz
93 g
2.8 oz
80 g
Memory 128 Mb 128 Mb 64 Mb
Data Non-Volatile Non-Volatile Non-Volatile
Settings Volatile Non-Volatile Non-Volatile
Software NSRT-Manager
LabVIEW Driver
Email Alarm Functions Only while Connected to a PC When Working Stand-Alone None
Timer One Time Start One Time Start Repeated Start & Stop
FFT Resolution (For Real-Time Display Only, Not Recording) 512 points 256 points 512 points
Software Description Importance Download
Noise Sentry RT Manager Installer (V340, March, 2016) Instrument Management Software Essential Install BEFORE connecting the instrument
Noise Sentry RT LabVIEWTM Driver (V150, May, 2015) LabVIEW Driver Optional
Noise Sentry RT Simple Start Installer (V300, May, 2015) Simple, minimal application to start a recording. Optional
Noise Sentry RT BigDisplay Installer (V300, May, 2015) An application for libraries, hospitals, etc. To let the public know that the noise level is too high. Optional
Noise Sentry RT Community Noise Metrics Installer (V340, April, 2017) An application to calculate various noise metrics, such as CNEL, LDEN… and many others Optional

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