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


  • 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.

    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
    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

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