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Larson Davis · 831 · Handheld sound level meter

Model 831

Discontinued

Class 1 sound level meter and analyser that preceded the SoundAdvisor 831C in the Larson Davis range. Discontinued in June 2022 with the 831C offered as the replacement; legacy units remain supported for technical support, service and calibration, and new firmware for the 831 ceased in September 2025.

Discontinued 2022. Specifications verified on .

Type
Handheld sound level meter
Class
Class 1
Channels
1
Octave bands
1/1 and 1/3
Connectivity
USB 2.0 host and peripheral, AUX connector, I/O connector
Battery life
8 h
Compare with other instrumentsAll handheld sound level meters

Specifications

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

Standards and class — Model 831
SpecificationValue
IEC 61672-1 classClass 1
StandardsIEC 61672-1 class 1 (manual states measuring to IEC 61672-1 and class 1 performance; full standards list in Appendix A not read)
Measurement — Model 831
SpecificationValue
Channels1
Measurement range16 to 140 dB with PRM831 preamplifier and 377B02 microphone (dynamic range > 120 dB(A))
Frequency weightingsA, C, Z
Time weightingsF, S, I
ParametersSPL, Leq, Lmax, Lmin, Lpeak, Lpeak(max), LN statistics, sound exposure and sound exposure level, Ldn, Lden, CNEL, noise dose (831-IH), RT60 (831-RT)
DosimetryYes
Analysis — Model 831
SpecificationValue
Octave bands1/1 and 1/3
Octave band filter class831-OB3 option (class not stated in manual text read)
FFT831-FFT option (line count not stated in manual text read)
Reverberation timeYes
Audio recordingYes
Logging and data — Model 831
SpecificationValue
Shortest logging interval20 ms (831-LOG); 2.5 ms spectral logging (831-FST)
Memory2 GB internal data storage
Hardware — Model 831
SpecificationValue
Microphone1/2" 377B02 free-field or 377C20 random incidence, 50 mV/Pa, class 1
Detachable preamplifierYes
Weather sensorsYes
Display160 x 240 graphic LCD with backlight
Battery4 x AA (NiMH, alkaline or 1.5 V lithium)
Battery life8 h
External power+10.8 to +30 V DC; PSA029 adapter 90 to 274 V AC, 5 V DC output
IP ratingIP53 (case, dust tight)
Connectivity and software — Model 831
SpecificationValue
ConnectivityUSB 2.0 host and peripheral, AUX connector, I/O connector
SoftwareG4 LD Utility, SLM Utility-G3
Latest firmwareno new firmware from September 2025 (manufacturer announcement); manual I831.01 Rev T (2022) is the last edition

Where this data comes from

Manufacturer documents used for this record
KindDocumentAccessed
Press releaseProduct and support announcements (Model 831 discontinued June 2022; no new firmware from September 2025)
ManualModel 831 SLM Manual, I831.01 Rev T (2022), hosted by PCB Piezotronics (Larson Davis parent)

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

Spec out of date? Tell us (reference larson-davis-model-831).

Verified owner reviews

Reviews from people who own and use this instrument, each checked against a serial number by a person.

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Known issues and firmware notes

Hardware and firmware problems reported by owners, with the firmware version concerned and any manufacturer response.

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Feature requests

Functions owners would like to see in a firmware update or a successor model.

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