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Norsonic · Nor130 series · Handheld sound level meter

Norsonic Nor131

Current

Compact integrating sound level meter for occupational hygiene and general noise assessment, with a monochrome display, four AA cells and optional 1/1-octave filters, statistics, STIPA and parallel time constants. The Nor131 is Class 1 with a detachable IEPE preamplifier; the Nor132 is the Class 2 version of the same instrument.

Specifications verified on .

Type
Handheld sound level meter
Class
Class 1
Channels
1
Octave bands
1/1 and 1/3
Connectivity
USB 2.0, analogue output (100 mV full scale), TNC input
Weight
380 g
Battery life
8 h
Compare with other instrumentsAll handheld sound level meters

Specifications

As published by Norsonic. Fields the manufacturer does not publish are omitted rather than estimated.

Standards and class — Norsonic Nor131
SpecificationValue
IEC 61672-1 classClass 1
StandardsIEC 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)
Measurement — Norsonic Nor131
SpecificationValue
Channels1
Measurement range-10 to 137 dB at 50 mV/Pa, single 120 dB range
Peak rangeup to 140 dB (C-weighted peak)
Frequency range20 Hz to 16 kHz broadband; filters 8 Hz to 16 kHz (1/1) or 6.3 Hz to 20 kHz (1/3)
Frequency weightingsA, C, Z
Time weightingsF, S, I
Simultaneous weightingsNo
ParametersSPL, Leq, Lmax, Lmin, LE, Lpeak, Tmax5, L1, L5, L10, L50, L90, L95, L99 plus one user percentile
Analysis — Norsonic Nor131
SpecificationValue
Octave bands1/1 and 1/3
Octave band filter class1/1 octave option 1 (12 bands); 1/3 octave option 4
Speech intelligibilitySTIPA (option 5)
Logging and data — Norsonic Nor131
SpecificationValue
MemoryAbout 5 MB flash; about 10,000 measurements (2,500 with octave data)
Hardware — Norsonic Nor131
SpecificationValue
Microphone1/2" Nor1228 with Nor1207 IEPE preamplifier
Detachable preamplifierYes
Outdoor microphone kitNor1218 outdoor microphone protection
DisplayMonochrome transflective LCD, 160 x 240, backlit
Battery4 x AA (LR6) alkaline; 11 to 16 V DC external (Nor340 adapter)
Battery life8 h
Weight380 g
Dimensions (mm)215 x 74 x 29 (305 with microphone and preamplifier)
Operating temperature (°C)-10 to 50
Connectivity and software — Norsonic Nor131
SpecificationValue
ConnectivityUSB 2.0, analogue output (100 mV full scale), TNC input

Variants

Variants of the Norsonic Nor131 as the manufacturer names them
VariantDifference
Nor131Class 1; self-noise 17 dB(A); detachable Nor1207 IEPE preamplifier
Nor132Class 2; self-noise 25 dB(A); fixed preamplifier

Where this data comes from

Manufacturer documents used for this record
KindDocumentAccessed
Product pageNor131 and Nor132 Sound Level Meter
OtherNorsonic product range 2024-2025

Verified on . Only the manufacturer’s own published material is used; distributor pages are not sources.

Spec out of date? Tell us (reference norsonic-nor131).

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Known issues and firmware notes

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Feature requests

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