Rion NL 42 Sound Level Meter (Class /2) – Precision, Reliability & User-Friendly Design
The Rion NL 42 is a Class /2 sound level meter engineered for accurate environmental and workplace noise measurement, balancing professional-grade performance with ease of use. It’s purpose-built for industries such as construction, industrial monitoring, consulting, and public safety.
Key Features & Benefits
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Wide Measurement Range & High Sensitivity
Measures sound from 25 /dB to 138 /dB (A weighted) with 0.1 /dB resolution and ±1.5 /dB accuracy. Extended peak ranges reach up to 141 /dB for C and Z weighted modes. -
Comprehensive Real-Time Data Processing
Simultaneously captures Lp, Leq, Lmax, Lmin, and multiple percentile levels (LN). Optional sub channel weightings such as LCeq or LZpeak expand functionality. -
Intuitive Interface & Long Life Performance
Featuring a backlit TFT LCD touchscreen, this meter requires no paper manual and is water-resistant (IP54, excluding the microphone). Long battery life supports continuous measurements for up to one month on rechargeable power. -
Robust Data Logging & PC Connectivity
Stores over 10,000 datapoints to CompactFlash cards. Enables USB Virtual Disk access or RS 232C communication for seamless data transfer and external analysis.
Ideal Applications
Perfect for:
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Environmental noise monitoring (e.g. construction sites, traffic studies)
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Industrial and workplace compliance
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Sound level assessments in offices, campuses, and public venues
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Acoustic consulting and research tasks requiring portable data logging
Why Choose the Rion NL 42?
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Reliability in Field Conditions: Waterproof body and robust components ensure dependable performance even outdoors.
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User-Focused Operation: Intuitive menus, dedicated function keys, and no paper manual streamline field workflows.
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Extendable Measurement Capabilities: Optional functionality like Eiffel band / FFT, waveform recording, and NC curve analysis via add-on modules (NX 42EX).
Technical Data
| Rion Sound Level Meter NL-42 | |
| Measurement Functions | Simultaneous measurement of the following items, with selected time weighting and frequency weighting |
|
Microphone Type
Sensitivity Level |
UC-52 -33 dB |
| Measurement Range | A-weighting: 25 dB to 138 dB C-weighting: 33 dB to 138 dB Z-weighting: 38 dB to 138 dB C-weighting peak: 55 dB to 141 dB Z-weighting peak: 60 dB to 141 dB |
| Level Range | Single range (Linearity range: 113 dB) |
| RMS Detection Circuit | Digital processing method |
| Display | Backlit semitransparent TFT LCD (400x240) *LCD with capacitive touch panel |
| Output Voltage | 1 V (rms) at bar graph display full scale |
| Power Requirements | 4x AA batteries or external power supply |
| Battery Life (23℃) | Alkaline: 26 h Ni-MH: 25 h *Depends on settings |
| Temperature | -10 to 50℃ |
| Humidity | 10 to 90% RH (non-condensing) |
| Dimensions, Weight | Approx. 250 x 76 x 33 mm, 400 g (with batteries) |
| Supplied Accessories | Storage case x1, Windscreen WS-10 x1, Fall prevention rubber x1, Hand strap x1, AA batteries x4, SD card 512MB ×1 (NX-42EX only) |
Upgrade your acoustic monitoring capabilities with the Rion NL 42 Sound Level Meter—trusted accuracy, intuitive use, and robust data logging in a portable Class /2 instrument.
Contact us today to learn more or place an order.
US 6736 
BR 3375 
CA 1568 
AU 1535 
TH 1469 
JP 1393 
SG 1162 
VN 1014 
