Noise Sentry NSRT_mk4
Product Description
The Sound Level Meter Data Logger NSRT_mk4 is the 4th generation of Convergence Instrument’s smart integrating sound-level meter/datalogger. It includes a type 1 digital MEMS microphone, an accurate date/time clock, and a non-volatile 128 Mb recording memory with a fast USB download.
Running on battery, it can record sound pressure levels 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 NSRT mk4 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.
Mounting Base and Tripod Adapter are included.
Sound Level Meter Data Logger NSRT_mk4 Applications
- Sound level and acoustic dose measurement and recording.
- Monitoring of safe working conditions.
- Activity detection and logging.
- Long-term measurement and recording of acoustic levels for environmental impact studies.
- Specially designed for long-term outdoors applications.
- NEW FEATURE: Measurement and recording of Lpeak
- Type I precision
- A, C and Z weighting curves.
- Integrating Sound-Level Meter, records Lpeak, L-max, L-min and Leq levels.
- Log interval adjustable from 125 ms (8 points per second) up to hours.
- 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.
- Ultra-stable sensitivity (field recalibration is easily done, but seldom required)
- Very low sensitivity variation due to temperature changes
- Very low sensitivity to vibrations
- Software function calculates CNEL, Lden, Percentiles and many other metrics.
- 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 be used as a high-quality USB digital microphone
- Allows the observation of recorded levels while the recording is ongoing.
- Works standalone, or USB connected.
- 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.
- 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 |
| Recording Resolution | 0.1 dB |
| Duty Rate of Signal Capture | 100% – No Missed Samples |
| Min Log Interval | 125 ms (8 points of Lpeak, Lmin, Lmax and LEQ per second) |
| Real-Time Spectral Display | 2048-Point Power Spectrum – dB or Lin Scale. |
| Calibration | Field-calibrated using a 1/2" calibrator |
| Connectivity | USB |
| 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 |
| Dimensions | 19 mm x 42 mm x 160 mm – (0.75” x 1.65” x 6.25”) |
| Weight | 100 g (0.1 lbs) |
| Construction | Weather-proof enclosure |
| Microphone Dust Protection | Expanded polytetrafluoroethylene (ePTFE) dust and water barrier |