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.
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.
Perfect for:
Environmental noise monitoring (e.g. construction sites, traffic studies)
Industrial and workplace compliance
Sound level assessments in offices, campuses, and public venues
Acoustic consulting and research tasks requiring portable data logging
Reliability in Field Conditions: Waterproof body and robust components ensure dependable performance even outdoors.
User-Focused Operation: Intuitive menus, dedicated function keys, and no paper manual streamline field workflows.
Extendable Measurement Capabilities: Optional functionality like Eiffel band / FFT, waveform recording, and NC curve analysis via add-on modules (NX 42EX).
| 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) |
