Details

---

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

• 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:

• 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

---

Why Choose the Rion NL‑42?

• 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).

---

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.