Compare instruments
Up to 4 instruments of the same type, every published specification side by side. Rows where the values differ are tinted. A blank cell means the manufacturer does not publish that value.
Comparing 4 handheld sound level meters. Back to the category table.
| Specification | Norsonic Nor103Norsonic | Norsonic Nor131Norsonic | Norsonic Nor140Norsonic | Norsonic Nor145Norsonic |
|---|---|---|---|---|
| Status | Current | Current | Current | Current |
| Verified on | ||||
| Standards and class | ||||
| IEC 61672-1 class | Class 1 | Class 1 | Class 1 | Class 1 |
| Standards (differs) | IEC 61672-1:2013 class 1, JIS C 1509-1 | IEC 61672-1 class 1 (Nor131) / class 2 (Nor132), IEC 61260-1/-2/-3, ANSI S1.4, ANSI S1.11, ANSI S1.43, DIN 45657, IEC 60268-16 ed. 4 and ed. 5 (STIPA, option 5) | IEC 61672-1 class 1, IEC 61260-1 class 1, ANSI S1.4, ANSI S1.11, DIN 45657, IEC 60268-16 ed. 5 (STIPA, option 13), ISO 16283-1/-2/-3, ISO 717-1/-2, ISO 3382-2, ISO 1996-1/-2 | IEC 61672-1:2013 class 1, IEC 61260-1 class 1, IEC 60651, IEC 60804, DIN 45657, ANSI S1.4, ANSI S1.11, ANSI S1.43, IEC 60268-16:2020 (STIPA), ISO 16283-1/-2/-3, ISO 717-1/-2, ISO 3382-2/-3, ISO 1996-1/-2 |
| Pattern approvals (differs) | — | — | PTB (Germany), METAS (Switzerland), LNE 24006 rev. 2 (France), BEV Z 1522-08 (Austria) | PTB (Germany), LNE 37403-1 (France), METAS (Switzerland), BEV (Austria), CIM (Czech Republic), IPQ (Portugal), GUM (Poland) |
| Measurement | ||||
| Channels | 1 | 1 | 1 | 1 |
| Measurement range (differs) | A 30 to 137 dB; C 40 to 137 dB (wide range) | -10 to 137 dB at 50 mV/Pa, single 120 dB range | about -10 to 137 dB at 50 mV/Pa, single 120 dB range (147 dB with option 18) | 17 to 137 dB(A) RMS, single 120 dB range |
| Peak range (differs) | 68 to 140 dB (C-weighted peak) | up to 140 dB (C-weighted peak) | 140 dB peak standard; 150 dB with option 18 | 45 to 140 dB (C-weighted peak) |
| Frequency range (differs) | 10 Hz to 20 kHz | 20 Hz to 16 kHz broadband; filters 8 Hz to 16 kHz (1/1) or 6.3 Hz to 20 kHz (1/3) | 0.5 Hz to 16 kHz (1/1 octave, option 1); 0.4 Hz to 20 kHz (1/3 octave, option 3) | 0.4 Hz to 40 kHz (1/3 octave and FFT, with infrasound and ultrasound options); 6.3 Hz to 20 kHz standard |
| Frequency weightings (differs) | A, C | A, C, Z | A, C, Z | A, C, Z, B, G, U |
| Time weightings (differs) | F, S | F, S, I | F, S, I | F, S, I |
| Simultaneous weightings (differs) | — | No | No | Yes |
| Parameters (differs) | Lp, Leq, LE, Lmax, LCpeak | SPL, Leq, Lmax, Lmin, LE, Lpeak, Tmax5, L1, L5, L10, L50, L90, L95, L99 plus one user percentile | SPL, Leq, Lmin, Lmax, LE, Lpeak, LN (8 values), LeqI, LEI, LTmax5 | Leq, Lmax, Lmin, LE, Lpeak, LFTm5, Ln percentiles, Tmax5, LAeq-LCeq, up to 60 parameters logged in parallel |
| Analysis | ||||
| Octave bands (differs) | None | 1/1 and 1/3 | 1/1 and 1/3 | 1/1 and 1/3 |
| Octave band filter class (differs) | — | 1/1 octave option 1 (12 bands); 1/3 octave option 4 | class 1 (IEC 61260), options 1 and 3 | class 1 (IEC 61260) |
| FFT (differs) | — | — | 8000 lines, 1.46 Hz resolution (option 14) | 8192 lines standard, 16384 lines with ultrasound option; 1.46 Hz resolution |
| Reverberation time (differs) | No | — | Yes | Yes |
| Building acoustics (differs) | No | — | Yes | Yes |
| Speech intelligibility (differs) | — | STIPA (option 5) | STIPA (option 13) | STIPA (option Nor145/17) |
| Audio recording (differs) | No | — | Yes | Yes |
| Logging and data | ||||
| Shortest logging interval (differs) | 1 min (measurement durations 1, 5, 10, 60 min) | — | 5 ms (option 7); 1 s standard (option 6) | 5 ms |
| Memory (differs) | — | About 5 MB flash; about 10,000 measurements (2,500 with octave data) | About 25 MB internal flash plus SD card (included) | microSD, 64 GB included (tested to 512 GB) |
| Hardware | ||||
| Microphone (differs) | 1/2" electret condenser UC-59, -27 dB re 1 V/Pa, integrated preamplifier | 1/2" Nor1228 with Nor1207 IEPE preamplifier | 1/2" free-field Nor1225, 50 mV/Pa, with Nor1209 preamplifier (7-pin LEMO); 0 or 200 V polarisation | 1/2" free-field Nor1239 with Nor1209 preamplifier, about 16 dB(A) self-noise; GRAS 47HC low-noise option |
| Detachable preamplifier (differs) | No | Yes | Yes | Yes |
| Outdoor microphone kit (differs) | — | Nor1218 outdoor microphone protection | Nor1217 outdoor microphone protection | Nor1217 (temporary) or Nor1216 heated (permanent) outdoor microphones |
| Weather sensors (differs) | — | — | — | Yes |
| Display (differs) | Numeric display, 0.1 dB resolution, with 30 to 130 dB bar graph | Monochrome transflective LCD, 160 x 240, backlit | Monochrome transflective backlit LCD, 160 x 240 | 4.3" colour touchscreen plus push keys |
| Battery (differs) | 2 x AAA (LR03) | 4 x AA (LR6) alkaline; 11 to 16 V DC external (Nor340 adapter) | 4 x AA (LR6); 11 to 16 V DC external | Replaceable Li-ion pack; 9 to 15 V DC input; Nor345C mains adapter |
| Battery life (differs) | 9 h | 8 h | 8 h | 8 h |
| Weight (differs) | 105 g | 380 g | 410 g | 535 g |
| Dimensions (mm) (differs) | 130 x 63 x 23.5 | 215 x 74 x 29 (305 with microphone and preamplifier) | 210 x 75 x 30 (292 with microphone and preamplifier) | 235 x 82 x 29 excluding microphone |
| Operating temperature (°C) (differs) | -10 to 50 | -10 to 50 | -10 to 50 | — |
| Connectivity and software | ||||
| Connectivity (differs) | — | USB 2.0, analogue output (100 mV full scale), TNC input | USB 2.0, RS-232, 3 digital inputs, 4 digital outputs, AC output (3.5 mm), Bluetooth via Nor520 transceiver | WLAN, LAN, USB host, 4G/LTE modem (option Nor145/16, factory fitted), GPS, digital I/O |
| Remote control (differs) | — | — | NorCloud login | NorCloud, NorVirtual app, NorRemote (Android), internal web server, API option Nor145/15 |
| Software (differs) | — | — | Nor850 Suite, NorCloud, CtrlBuild, NorBuild (Nor1028) | NorCloud, NorConnect, NorVirtual, NorRemote, NorReview, Nor850 Suite |
| Latest firmware (differs) | — | — | 4.0.1550 (listed 14 March 2024) | 6.0.3025 (25 June 2026); release note v6.0.2920 (22 May 2026) |