NSRTW mk4
565.00 $
New microphone with
extended dynamic range
Wireless sound level meter datalogger with a dust-protected class 1 digital MEMS microphone, an accurate date/time clock, a non-volatile 128 Mb recording memory and wireless connectivity with fast USB and WiFi download.
TECHNICAL EQUIPMENT - FREE EXPERT GUIDANCE
This sound level meter comes in 4 configurations depending on:
- • Monitoring duration required (weeks vs months)
- • Connectivity (USB, WiFi, Cloud)
- • Integration with your systems
→ An expert can guide you to choose the perfect solutions for your need (it's free)
The Wireless Sound Level Meter Data Logger NSRTW_mk4 is the 4th 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. Its very small size allows it to be attached to or embedded within the monitored equipment.
Every Wireless Sound Level Meter Data Logger NSRTW 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, as well as email alarms.
Over The Air Reconfiguration through the cloud.
Mounting Base and Tripod Adapter are included.
Wireless Sound Level Meter Data Logger NSRTW_mk4 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 outdoors applications.
✔️ Get help from noise expert for choosing the right model
✔️ Optimal configuration and specs for your project
✔️ Call us now or get email response within 24h
In stock (can be backordered)
Key Features
Class 1 Precision
Class 1 sound level meter with digital MEMS microphone for accurate measurements
WiFi + USB Connectivity
Fast download and remote monitoring capabilities for flexible deployment
Extended Battery Life
Up to 5 days of battery life with integrated rechargeable battery
Outdoor Ready
Dust-Protected weatherproof enclosure for long-term outdoor installations
Product Description
The NSRTW_mk4 is a wireless sound level meter datalogger with Class 1 digital MEMS microphone, accurate date/time clock, non-volatile 128 Mb memory and wireless connectivity for long-term monitoring applications.
This professional-grade instrument is designed for construction site monitoring, industrial compliance (OSHA/HSE), environmental impact studies, and research applications requiring continuous noise level measurement.
With its WiFi-enabled connectivity, the NSRTW_mk4 allows for remote data access and real-time monitoring, making it ideal for projects requiring frequent data retrieval or continuous cloud integration.
Wireless Sound Level Meter Data Logger NSRTW_mk4 Applications
- Sound level and acoustic data measurement and recording
- Noise studies
- 24/7 noise monitoring on construction sites
- Fixed alarms when the noise is too loud
- Collect data remotely through WiFi
- Long-term measurement and recording of acoustic levels for environmental impact studies
- Specially designed for long-term outdoor use
Features
- Class 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 Instruments provided with every instrument purchased.
- WiFi™ connectivity to report measured levels remotely and automatically at preset intervals.
- Email alerts on level, LEQ, as well as low-battery.
- Digital very sensitive MEMS microphone (29 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 and WiFi connection from hard-reset or battery loss.
- Compatible with Convergence Instruments' Cloud service
Specifications
| Bandwidth | 20 Hz to 20 kHz |
|---|---|
| Microphone Sensor | Digital MEMs |
| Precision Class | Complies with the precision requirements of IEC61672-2002 Class 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 94 dB 1/2” calibrator |
| Connectivity | USB, WiFi |
| Radio Standard | IEEE 802.11 b/g/n (2.4GHz-only transceiver) |
| Radio Certification | FCC, IC, Japan, Korea, CE |
| Battery Type | Integral Li-Poly – USB-Rechargeable |
| Recharge Time | 2 h 30 (Typical) |
| Battery Autonomy (Full-Charge) | 7 days while recording (WiFi operation will drain battery slightly more, depending on rate of connect) |
| Battery Life | > 300 Charge/Discharge Cycles |
| Temperature Range | -20°C to 60°C (-4°F to 140°F) |
| Recording Memory Type | Non-Volatile Flash Memory |
| Recording Memory Capacity | 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 |
| WiFi Security | Open, WEP, WPA / WPA2 Personal, WPA2-Enterprise (EAP-PEAP, EAP-TTLS) |
| Server Connection | IP address/Domain Name |
| Protocol | TCP/IP – Proprietary Protocol |
Talk to an expert
Which Model to Choose?
| Feature | NSRT_mk4 | NSRTW_mk4 | NSRTW_mk4 Cloud |
|---|---|---|---|
| Price | Base price (no WiFi) | Higher (adds WiFi) | Highest (WiFi + Cloud service) |
| Battery Life | 5 to 7 days on battery, months while externally powered | Similar autonomy on battery, WiFi reduces battery time. | Similar autonomy on battery, WiFi reduces battery time |
| WiFi Built-in | No | Yes | Yes |
| 24/7 Cloud | No | Optional / via local setup | Yes, 1Y included |
| Best For | Short-term logging with local download | WiFi projects with local IT / VPN | Remote 24/7 cloud noise monitoring |
Clients Use the NSRTW_mk4 For:
CONSTRUCTION SITE MONITORING
(3-6 months)
"We monitor sound levels for municipal compliance"
→ Industries: Contractors, Municipalities
INDUSTRIAL COMPLIANCE (OSHA/HSE)
"Continuous measurement for workplace safety standards"
→ Industries: Manufacturing, Factories
ENVIRONMENTAL IMPACT STUDIES
(6-12 months)
"Data collection for environmental reports"
→ Industries: Consulting firms, Government
| 5 star | 100% | |
| 4 star | 0% | |
| 3 star | 0% | |
| 2 star | 0% | |
| 1 star | 0% |
1-3 of 3 reviews
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Best in Class
This class 1 meter is an outstanding value. Wi-fi connectivity for data logging makes the system totally seamless and the tech support is outstanding. Similar instruments of this caliber are far more expensive making it the best value in class 1 meters I have found.
Great instruments, prompt shipment
If Steve Jobs made a wireless Sound Meter
Design – 10
Function -10
Service -11
Value -10