SV 277 Pro Outdoor Noise Monitoring station

SV 277   PRO is an outdoor monitoring system based on SVAN   977 Class   1 sound level meter.


For more information on SV 277 Pro Outdoor Noise Monitoring station or to request a quote, contact our team now:


The SVAN  977 can be easily removed from the case and used as a hand-held sound level meter. The monitoring station uses a 4G modem for the remote communication with Internet.

The IP   65-rated case contains a lead-acid battery which operating time can be easily extended by connecting an external battery or a solar panel. The intelligent charging unit enables use of a solar panel without expensive controllers or heavy batteries. The case is fitted with very robust, waterproof connectors (military standard) and is supplied with an IP  65 external power supply. The light-weight microphone protection kit can be easily installed on a mast with standard mounting threads.

All accessories fit conveniently into a second carrying case. The system provides broad-band results such as Leq, Max, Min and Peak with all standard weighting filters together with an incredible time-history logging feature with two adjustable logging steps. The broad-band results can be recorded in three acoustic profiles which enable measurements to be taken with 3 different filters (e.g. A, C, Z) as well as 3 different detector time constants (e.g. Fast, Slow, Impulse).

Technical Specifications of the SV 277 PRO

StandardsClass 1: IEC 61672-1:2013, Class 1: IEC 61260-1:2014
Weighting FiltersA, C, Z, B, LF, U, AU
Time ConstantsSlow, Fast, Impulse
RMS DetectorDigital True RMS detector with Peak detection, resolution 0.1 dB
MicrophoneMicrotech Gefell MK 255, 50 mV/Pa, prepolarised 1/2” condenser microphone
SA 277 outdoor protection kit (IP  65) with SC 277 extension cable
PreamplifierSV 12L
Linear Operating Range23 dBA RMS ÷ 140 dBA Peak (in accordance to IEC 61672)
Dynamic Measurement Range16 dBA RMS ÷ 140 dBA Peak (typical from noise floor to the maximum level)
Internal Noise LevelLess than 16 dBA RMS
Dynamic Range>110 dB
Frequency Range3 Hz ÷ 20 kHz
Meter Mode ResultsElapsed time, Lxy, Leqx (LEQ), Lxpeak (PEAK), Lxymax (MAX), Lxymin (MIN),
Measurement ProfilesSimultaneous measurement in three profiles with independent set of filters (x) and detectors (y)
StatisticsLn (L1-L99), complete histogram in meter mode and 1/1 & 1/3 octave analysis
Data LoggerTime-history logging with two adjustable logging steps down to 2 milliseconds
Analyser1/1 octave (included) or 1/3 octave real-time analysis (included),
up to 40.0 kHz band meeting Class 1: IEC 61260-1
FFT analysis 1600 lines, up to 40.0 kHz band (option)
RPM rotation speed measurement parallel to the vibration measurement (option)
RT60 reverberation time measurement (option)
Audio RecordingTime domain signal recording to WAV signal, continuous or triggered (option)
Sampling rate: 12/24/48 kHz with 24-bit resolution
MemoryMicroSD card 32 GB (removable & upgradeable up to 128 GB)
Communication InterfacesUSB 2.0
4G modem
RS 232 for meteo module
Power SupplyWaterproof DC power supply 15 V , 60 WATT (acceptable voltage range 11 V ÷ 30 V)
Internal battery 17 Ah / 12 V
Secondary external battery 33 Ah / 12  V (option)
Solar panel (option)
Operating Time on Battery4 days with continuous modem transmission1
8 days with modem switched off1
Test Conditions:
meter mode, display dimmed, 2 ms time-history logger, continuous event recording
Environmental ConditionsTemperature from -10 °C to 50 °C
Humidity up to 95 % RH, non-condensed
Dimensions305 x 270 x 194 mm (without cables)
WeightApproximately 9 kg including battery




Noise, Vibration and Dust are all around us, whether from a construction site, or near an airport or windfarm

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