RION NL-53 Sound Level Meter
NL-53 Rion Class 1 sound level meter with 3.5-inch TFT-LCD touch panel, LAN connectivity, USB Type-C, and IP54 protection. Measurement range 25–138 dB, 10 Hz to 20 kHz.
- IEC 61672-1: 2013 Class 1 compliant; also ANSI/ASA S1.4-2014/Part1 and JIS C 1509-1: 2017 Class 1
- LAN connectivity for remote browser-based monitoring and operation (NX-43EX required)
- USB Type-C: single cable for power supply, communication control, and data transfer
- Backlit 3.5-inch TFT-LCD QVGA display with touch panel
- Simultaneous measurement of up to four conditions with selectable frequency and time weightings
- Auto store: Lp intervals from 10 ms to 1 s; Leq intervals up to 24 h; SD card storage
- IP54 rated (excluding microphone); optional WS-15 windscreen adds IPX3 microphone protection
- Approximately 16 hours battery life (alkaline AA at 23°C, ECO setting)
- Optional octave/1/3 octave real-time analysis (NX-43RT, IEC 61260-1 Class 1)
- Optional waveform recording at 12/24/48 kHz (NX-43WR) and FFT analysis (NX-43FT)
The NL-53 is a Class 1 sound level meter from Rion, distributed by Norsonic, built around a connectivity-first design. Its LAN terminal — enabled by the optional NX-43EX extended function program — allows remote access from any web browser on a PC or smartphone, supporting measurement monitoring, remote operation, and data download over a local network or WAN via mobile router. This makes the NL-53 well suited to unattended environmental noise monitoring where regular site visits are impractical. The instrument features a backlit 3.5-inch TFT-LCD QVGA display with touch panel for intuitive operation. The USB Type-C connector handles power supply (compatible with commercially available portable chargers), communication control, and measurement data transfer through a single cable, with the internal SD card readable as a removable disk. IP54 water resistance (excluding the microphone) protects against dust and water splashing from any direction; mounting an optional all-weather windscreen WS-15 extends microphone protection to IPX3. Compliant with IEC 61672-1: 2013 Class 1, ANSI/ASA S1.4-2014/Part1 Class 1, and JIS C 1509-1: 2017 Class 1, the NL-53 measures A, C, and Z frequency-weighted sound pressure levels from 10 Hz to 20 kHz. Up to four measurement conditions with different frequency and time weightings can run simultaneously, with auto store logging instantaneous Lp and calculated Leq values continuously to SD card. Optional programs available with NX-43EX include waveform recording (NX-43WR at 12/24/48 kHz), octave and 1/3 octave real-time analysis (NX-43RT per IEC 61260-1), and FFT analysis (NX-43FT, 20 kHz range, 2.5 Hz resolution). For consultants, HSE departments, and facility managers across the GCC who need a reliable Class 1 sound level meter with modern connectivity, the NL-53 delivers strong measurement performance and remote monitoring capability.
