• Based on its all-weather design, DUO is also perfectly suited to indoor and outdoor noise monitoring. Its operating battery lifetime allows for more than 3 days of measurements without external power supply.
• Wireless connections (Wi-Fi and 3G) to DUO allow for remote access to the measurements in progress and selective retrieval of stored data avoiding physical presence of the operator in the field.
• DUO’s “all in one” unique design allows for extremely easy and fast transport and installation.
• DUO’s on-board periodical self-check of the entire measurement chain guarantees the reliability of the measurement results.

Multi connectivity

All connections capabilities onboard the instrument!

DUO includes a Wi-Fi module for short distance connection and a 3G modem to access the instrument from anywhere in the world. Your measurements have never been so easy to control.

Multi single-channel

Duo opens up new diagnosis capabilities!

It’s now possible, for instance, to analyze precisely and simultaneously noise pollution and disturbing sources in multiple positions.

Its accurate synchronization of clock and GPS positioning of the measurements allow using several DUO at the same time.

Web navigation

DUO is accessible through a comprehensive Web client!

DUO allows remote system configuration and measurements settings, calibration and electrical checks with associated historical data. Sound levels are available in real time wherever you are and with no software installation required.

Rapid instrument deployment

Free up more time for analysis and reporting!

DUO installation is quick and easy. Its sleek design and small form factor allows for safe and discreet deployment. With DUO’s ground breaking “all in one” design you no longer need multiple cables between the measuring instruments, microphone, batteries and modem.

Operating battery lifetime and memory

You can take the week-end off, DUO won’t stop measuring!

With long battery lifetime, full remote control of the entire instrument, and a high memory capacity, DUO opens up a new dimension in noise measurement.

In the absence of external power supply, DUO allows for more than 3 days of rated operating on batteries: continuous acquisition of time and spectral history, 10% audio recording, remote queries using Wi-Fi or 3G sporadically.

Fully weatherproof

DUO is protected and safe, come rain (or snow) and shine!

Its housing has been designed for outdoor use under all weather conditions. Its integral protection makes DUO discreet in the measurement environment. Developed exclusively for DUO, its all-weather microphone/cone set is manufactured by G.R.A.S., the world-renowned company specialized in precision noise transducers.

Assured metrology and data security

Relax, DUO reaches new heights in reliability!

Programmable in-situ automatic electrical checks and precision class components guarantee metrological reliability. With 0° and 90° incidence corrections it gives flexibility whatever you measure. To secure your instrument DUO has a unique anti-theft system.

DUO is compliant with class 1 for sound level meters according to Standard IEC 61672-1. Type examination is currently under progress at the French National Testing Laboratory (LNE). DUO users have then a full assessment of the measurement uncertainties resulting in undisputable test reports.

'You are not alone with DUO

Wirelessly measure the noise source and receiver simultaneously.

With DUO Smart Noise Monitor, you are playing a duet: you are no longer alone in the field. DUO enables better understanding of the noise environment with simultaneous parallel coding of two measurement points. All measurement data is automatically recorded so nothing is left to chance.

Two DUO (with accurate GPS positioning and time synchronization) allow automatic coding on one channel applied on the other channel using dBTrait. Moreover post processing on synchronized levels difference will be very powerful to highlight noise from the source under concern.