The Best Type 1 Sound Level Meter

SV 971A Compact and Versatile Class 1 (Type 1) Sound Level Meter. Type approved to ANSI/ASA S1.4 / IEC 61672 for occupational noise under OSHA, environmental surveys, building acoustics and STIPA.

Easy in Use

Simple UI and Mobile Apps

Small Size

Only 225 grams (8.20 oz)

Class 1 Accuracy

ANSI/ASA S1.4 & IEC 61672

3-year warranty for hardware!

Why Class 1 (Type 1) Matters

Class 1 has tighter tolerances than Class 2, and US rules count the difference. EPA 40 CFR 201 for railroads requires a Type 1 meter; with Type 2, measured levels are reduced by up to 4 dB to allow for instrument error. Illinois 35 IAC 951 requires Type 1 for noise enforcement.

Type approval is a certificate issued by a national metrology institute after its own testing. The SV 971A holds it from PTB, BEV and GUM, so its Class 1 accuracy can be verified outside the manufacturer.

Product Highlights

Up to 24 hours operating time

Self-vibration Detection

Class 1 Accuracy

Auto Calibration System

automatic calibration sequence

Frequency analysis

1/1 or 1/3 Octave Analysis (option)

Equipment tailored to your needs

We have the solution for you

Our meter will work well wherever precise sound measurement is important. Whether you operate in a large company, work individually, or simply want to better understand your environment.

Industry and manufacturing

Control of machine noise, compliance with health and safety standards.

Construction and infrastructure

Document sound levels in road, urban and construction projects.

Education and public institutions

Measuring acoustics in classrooms, conference rooms and libraries.

Environmental protection

Noise monitoring in parks, quiet zones, events and field studies.

Researchers, consultants, enthusiasts

Ideal for those conducting analysis, tests, audits or educational projects.

Configure your sound level meter for any application

Ensure full compliance and accurate results by requesting the optimal setup for your measurement needs. Whether it's OSHA noise exposure, environmental noise, ISO 16283 building acoustics, STIPA or other standards. We will match your application with the right configuration.

Professional sound measurements made easy

Step 1

Power on and select Simple Mode, or use mobile App

Step 2

Press Start to begin precise, compliant measurements

Step 3

Download data and generate a report using built-in templates

Dedicated Software Solutions

Comprehensive software package for acoustics and occupational noise.

Live monitoring
CSV Export
Mobile and desktop
Free software updates

Trusted by experts worldwide

Certified Quality You Can Trust

Key features and capabilities

Class 1

Type approved by PTB, BEV and GUM

Single range

120 dB: 17–137 dBA Leq, 140 dB Peak

Versatility

Filters A, B, C, Z, LF; Slow, Fast, Impulse

Low/High Frequencies

Frequency range 5 Hz ÷ 20 kHz

Logging

MicroSD 32 GB (up to 128 GB)

Simple UI

8 push buttons

Connectivity

USB, Bluetooth, RS 232

Precise analysis

1/1 or 1/3 Octave (option)

Recording

Audio recording, WAV format (option)

Statistics

L1-L99, complete histogram

Sound

SPL, LEQ, MAX, MIN, PEAK, LAV, TWA

Dose

Exchange rate 2–6 dB (OSHA 5, NIOSH 3)

Request a quote tailored to your measurement needs

Typical SV 971A pricing ranges between €2,500 and €4,000 (about $2,700 to $4,400), depending on local taxes, duties, and selected accessories.

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Certificates and specifications

CE Declaration

Building Acoustics Data Sheet

Occupational Noise Data Sheet

Pattern approval to IEC 61672 [ZT 2/2025]

Pattern approval to IEC 61672 [BP/0103-AKU/02460-002/2022 ]

Example manufacturer calibration certificate IEC 61672

Example accredited calibration certificate ISO 17025

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