SV 102A+ Class 1 Dual Channel Dosimeter

SV 102A+ Class 1 Dual Channel Dosimeter is presenting new approach to occupational health and safety acoustic monitoring task. This dosimeter can be also used as a dual-channel Class1 sound level meter and real-time 1/1 octave & 1/3 octave analyser.
Octave analysis, providing direct data for the design of the ear-protectors, together with Audio Events Recording (AER) function show the new reference standard on acoustic dose measurement field. The binaural dose measurement and octave analysis are simultaneously performed by this compact-size instrument. Three acoustic profiles per channel allow parallel measurements with independently defined filters and RMS detector time constants. Advanced time-history logging in each profile, together with spectra saving and Audio Events Recording provide a complete information about the measured signal. Data is stored in large 8 GB memory and can be easily downloaded to any PC using USB interface and Supervisor software.
The small and compact SV 15 preamplifier together with special mounting clip and dedicated headband enables an easy attachment of the microphone in extremely short distance to human ears. Calibration by measurement can be easily performed by direct usage of common acoustic calibrators.
SV 102A+ is also able to perform the measurement inside human ear – with the usage of SV 25S – smart microphone with an automatic calibration function (TEDS). The SV 102A together with SV 25S are designed for individual real-world test of the earmuffs noise reduction ratio by means of MIRE technique (Microphone-In-Real-Ear)-measurements under headphones or earmuffs. With a special adapter, SV 25S can be also calibrated with available acoustic calibrators.



  • Dual-channel Sound Level Meter conforming to Class 1: IEC 61672
  • Prepolarised 1/2″ microphone
  • Dual channel 1/1 octave analysis (option)
  • Single measurement range
  • Measurement range 45 dBA RMS ÷ 141 dBA Peak
  • MIRE measurement technique with SV 25S (option)
  • Three parallel independent profiles
  • Advanced data logger, up to 12 results per channel logged simultaneously including spectral analysis
  • Audio-events-recording (option)
  • MicroSD card
  • USB  interface
  • Large OLED display
  • Integration time programmable up to 24 h
  • Power supply by two AA rechargeable or standard batteries
  • Extremely compact, light weight and robust case


SV 102A+ Dual-Channel Acoustic Dosimeter Specification


Standards IEC 61252; ANSI S1.25-1991; Class 1: IEC 61672:2002, ISO 11904-1
Acoustic Dosimeter Mode Lav/Leq, SPL, Lmax, Lmin, SEL, SEL8, PSEL, LEPd, Dose (%),
TWA, E, E_8h, Peak, Run Time, Upper Limit Time (ULT),
L(C-A), Projected Dose (D_8h)
SLM Mode Leq, Spl, SEL, LEP,d, Lden, Ltm3, Ltm5, statistics – Ln (L1- L99), LMax, LMin, LPeak
Simultaneous measurement in three profiles with independent set of filters and detectors
Weighting Filters A, C and Z
RMS Detector Digital true RMS detector with Peak detection, resolution 0.1 dB
Time constants: Slow, Fast, Impulse
Microphone SV 7052E, prepolarised, 1/2″ housing
SV 25S, special microphone with dedicated probe for
Microphone-In-Real-Ear technique (option)
Preamplifier SV 15 with integrated cable
Measurement Range 45 dBA RMS ÷ 141 dBA Peak (with SV 7052E microphone)
Typical noise floor less than 35 dBA
Frequency Range 20 Hz ÷ 20 kHz, sampling rate 48 kHz
Dynamic Range 100 dB
Data Logger1 Time-history logging of Leq/Lmax/Lmin/Peak/Lav results to internal memory with time step down to 100 millisecond to microSD card
Audio Recorder1 Time-domain signal events recorder (option)
Dual-channel Mode Dual-channel measurement mode with second microphone SV 7052E or SV 25S (option)
1/1 Octave1 Dual-channel 1/1 octave real-time analysis and spectra logging,
10 filters with centre frequencies from 31.5 Hz to 16 kHz, Type 1: IEC 61260 (option)
1/3 Octave1 Dual-channel 1/3 octave real-time analysis and spectra logging,
31 filters with centre frequencies from 20 Hz to 20 kHz, Type 1, IEC 61260 (option)

Basic Data

Input 2 x LEMO 2-pin, Direct
Display Colour 160 x 128 pixels OLED type
Memory MicroSD card 8 GB (removable & upgradeable)
Interfaces USB 1.1 Client
Extended I/O – AC output (1 V Peak) / Digital Output (Alarm trigger) / Digital Input (Input trigger)
Power Supply Two AA batteries (alkaline): operation time > 16 h (3.0 V / 1.6 Ah)2
Two rechargeable batteries (not included): operation time > 20h (2.4 V / 2.6 Ah)2
USB interface: 150 mA HUB
Environmental Conditions Temperature: from -10 oC to 50 oC
Humidity: up to 90 % RH, non-condensed
Dimensions 95 x 83 x 33 mm (without microphones)
Weight 260 grams with batteries (without microphones)

1function parallel to the acoustic dosimeter mode or meter mode

2depends on instrument operation mode

*Continuous product development and innovation are the policy of our company. Therefore, we reserve the right to change the specifications without prior notice.