Sound level meter SPMTWO

Measure and analyze sound

The powerful instrument for stand-alone sound level measurements. In parallel, the system collects and stores data and automatically transfers them to up to 2 independent servers. At the same time, the noise level measurement can be monitored from your workplace or mobile device. The SPMTWO sound level meter is used for rail, road and air traffic as well as on construction sites, at events and in industrial plants.



How we measure success: Your advantages.

Measuring accuracy class 1

Measurement according to DIN EN 61672

Accredited calibration

Calibration by accredited calibration laboratory

Server connection

Automatic measured value transmission to 2 independent servers


Real-time transmission of sound and event data

Ethernet und USB
Ethernet and USB

Data interfaces Ethernet and USB

Weather Station
Weather station

Record and analyse meteorological influences on sound propagation

Technology at a glance

See here how the iocto sound level meter is constructed and which components make up its functionality. We will be happy to show you more, live or online, during a consultation.

SPMtwo aussen
SPMtwo innen
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Mission Sound Measurement: The SPMTWO

For all those who like to take a closer look. Our photo gallery shows you the product in detail, as a whole and from different perspectives and in different situations.

Technical information

The SPMTWO is particularly user-friendly and has been specially developed for sound level monitoring and analysis. Its range of services includes long-term data storage as well as automatic transmission to two independent servers for data visualization and evaluation. In addition, the instrument enables the analysis and evaluation of all measured variables in the time domain and the display of FFT and third-octave bands in real time.

Application areas

  • Continuous monitoring of sound sources
  • Noise level measurement can be monitored at any time from a workstation or mobile device
Level range25–140 db
Frequency range20 Hz – 20 kHz
Frequency ratingA-Filter, C-Filter, Z-Filter
Time ratingFast, Slow, Impulse
FFTWith 128x zoom
Third-octave analyser30 bands (25 Hz – 20 kHz)
AccuracyClass 1 according to DIN EN 61672
Display7“ FFT Display with Touch
Microphone interfaceAES 42 Digital
Data interfacesEthernet, USB, CAN, RS422
ModemAnalogue, ISDN, GSM

Suitable accessories

Weatherproof outdoor microphone

Our weatherproof microphone unit is designed for continuous outdoor use

Wetter Station
Weather station

With the multi-purpose weather station you can measure not only sound but also the most important meteorological parameters.

Outdoor housing

The outdoor housing reliably protects the device from environmental influences thanks to the housing-within-a-housing concept and is suitable for wall and pole mounting.

Mobile Messstation
Mobile measuring station

For carrying out self-sufficient, mobile measurements.

Installation material and other accessories

Everything you need for installation, such as stand, sliding mast, LTE modem, cable extensions, etc.


How is the product maintained?

We recommend an annual recalibration and adjustment for all our sensors to be able to guarantee the exact functionality. We calibrate our sensors with state-of-the-art measurement technology in our in-house calibration laboratory. Our test equipment is one of the most accurate references in measurement and control technology. The test results are summarised in a factory calibration certificate in accordance with DIN EN ISO/IEC 17025:2018-03.

Ready to download?

Simply download the latest product information here. Do you have further questions about iocto and our products? We are happy to help.