Home Products Noise & Vibration Measurement Systems Noise Monitoring SV 307A Outdoor Noise Monitoring Station

SV 307A Outdoor Noise Monitoring Station

The SV307A is the newest version of the all-in-one noise monitoring station based on a patented MEMS microphones technology covered by a life-time warranty.

Interested

For more information on SV 307A Outdoor Noise Monitoring Station or to request a quote, contact our team now:

request a quote contact us

Compatible with SvanNET

The SV 307A Outdoor Noise Monitoring Station can be used with SvanNET for remote communication and automatic monitoring services.

try our live demo

The SV 307A Class 1 noise monitoring station has been designed for permanent noise monitoring in all weather conditions. It uses smart solutions to control the internal temperature and to detect any hardware failures.

The new housing is made from strengthened materials that protects the internal electronics: Class 1 sound level meter with 4G and GPS modems. The SV 307A measures noise levels, statistics and spectra together with audio files that can be triggered on level or time. The advanced triggering provides the possibility of the noise prediction to alarm the user before certain noise levels are reached. Also, with the SvanNET Service it is possible to connect to SV 307A to listen to the live noise from the microphone!

SV 307A Approved by PTB as Class 1 Sound Level Meter

In March 2022, the Physikalisch-Technische Bundesanstalt (PTB) granted the world’s first type approval to a noise monitoring station with a MEMS microphone. The SV 307A recieved the certificate of conformance to the Class 1 Sound Level Meter specified by IEC 61672. It is an important turning point in the history of MEMS microphones in environmental noise monitoring.

Noise, Meteo, Dust

The SV 307A can be integrated directly with a dedicated weather monitoring module or dust monitor. Sound level meter measurement data is combined with all meteorological values such as wind speed, wind direction, rain, humidity, or dust particles (PM 2.5 or PM10) when external sensors are connected. Moreover, the advanced triggering system can use noise, weather, or dust parameters for alarm triggering.

Remote Monitoring Service

The SV 307A includes the basic licence for the SvanNET remote communication service which can be upgraded to the automatic monitoring services. The automatic service offers fully automated management of multi-point noise and building vibration measurement (peak particle velocity). Tools such as automatic files download, data storage, advanced alarms, data sharing and reporting enable unattended noise and building vibration measurement. The functionality of SvanNET allows for group monitoring stations in projects so that alarms and reports are defined for each project separately. The data files are also grouped automatically by project assignments.

If you’re planning to power instrumentation with an external battery, use our battery runtime calculator.

SV 307A Noise Monitoring Terminal Specification

Standards	Class 1: IEC 61672-1:2013, Class 1: IEC 61260-1:2014
Weighting Filters	A, B, C, Z, LF
Time Constants	Slow, Fast, Impulse
RMS Detector	Digital True RMS detector with Peak detection, resolution 0.1 dB
Microphone	Patented MEMS based design microphone ST 30A in 1/2” housing
Preamplifier	Integrated
Linear Operating Range	30 dBA RMS ÷ 128 dBA Peak (in accordance to IEC 61672)
Total Dynamic Measurement Range	23 dBA RMS ÷ 128 dBA Peak (typical from noise floor to the maximum level)
Internal Noise Level	less than 23 dBA RMS
Dynamic Range	>100 dB
Frequency Range	20 Hz ÷ 20 kHz
Meter Mode Results	Elapsed time, Lxy, Lxeq (LEQ), Lxpeak (PEAK), Lxymax (MAX), Lxymin (MIN), LxyE (SEL), 2 x LR (ROLLING LEQ),10 x LN (LEQ STATISTICS), Lden, LEPd, Ltm3, Ltm5, GPS coordinates
Measurement Profiles	Simultaneous measurement in three profiles with independent set of filters (x) and detectors (y)
Statistics	Ln (L1-L99), complete histogram in meter mode and 1/1 & 1/3 octave analysis
Data Logger	Logging of summary results (SR) and spectra data with interval step down to 1 s and time history (TH) of selected parameters with shorter interval step down to 100 ms
1/1 Octave Analysis (option)	Real-time analysis meeting Class 1 requirements of IEC 61260, center frequencies from 31.5 Hz to 16 kHz
1/3 Octave Analysis (option)	Real-time analysis meeting Class 1 requirements of IEC 61260, centre frequencies from 20 Hz to 20 kHz
Audio Recording (option)	Time domain records to wav file format on demand with selectable bandwidth and recording period
Ingress Protection Rating	IP 64
GPS	Time synchronization and localization
Remote system check	Inbuilt reference sound source producing level of 100 dB at 1 kHz
Memory	MicroSD card 32 GB (removable & upgradeable up to 128 GB)
Display & Keyboard	OLED colour display 128 x 160 px and 10 push-button keyboard
Communication Interfaces	USB 2.0 4G modem RS 232 for meteo module or dust monitor
Power supply	Li-Ion rechargeable battery (non-removable) Operation time on battery (7.2 V / 10 Ah): Modem off Modem on Solar Panel (not included) AC power supply (included) External DC source (not included)up to 6 days up to 5 days (depends on modem usage) MPPT voltage 17.0 V ÷ 20.0 V Input 100 ÷ 240 VAC output +15 VDC 2.5 A, IP 67 housing voltage range 10.5 V ÷ 24 V e.g. 12 V or 24 V accumulator
Environmental Conditions	Temperature Humidity from -20 °C to 50 °C up to 95 % RH, non-condensed
Dimensions	680 mm length; 80 mm diameter excluding windscreen (windscreen diameter 130 mm)
Weight	Approx. 2.0 kg

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

SV 307A Datasheet

SV 307A User Manual

SV 307A PTB Type Approval

Accessories available for the SV 307A Outdoor Noise Monitoring Station:

Bracket for SP 276 Maximet GMX600 weather station

SA 276

Pole mounting bracket for SV307A/SV200A

SA 306

Carrying case for SV 307A and accessories

SA 307

External battery for SV 307A including indoor charger with SC 285 5m DC cable for SV30

SB 275

DC power supply cable for SB 274 and SV 307A, 5m

SC 307

Cable to connect third-party external battery for SV 307A, 5m

SC 334

Hot environment waterproof power supply for SV 307A without DC and mains cables

SB 274

Cable for SB 275 to SV 307A, 6 meters

SC 285

Mains power supply cable for SB 274, 5 meters

SC 270

Cable USB for SV 307A

SC 316

Maximet GMX600 Weather Station with SC 276 cable 10 meters and SA276 mounting bracket

SP 276

Solar panel for SV 307A monitoring stations (40 W), 5m cable. Pole mounted or ground mounted.

SB 371

For more details or to order accessories for the SV 307A Outdoor Noise Monitoring Station, get in touch with our team.

Advancing Environmental Compliance with SV 307A

The Significance of PTB Type Approval for MEMS Technology

The SV 307A represents a landmark in acoustic engineering as the first noise monitoring station with a MEMS microphone to receive PTB Type Approval. For environmental consultants and local authorities, this certification provides the ultimate assurance of data legal defensibility.

Class 1 Precision: Meets strict IEC 61672 standards, ensuring accuracy across the full 20 Hz to 20 kHz frequency range.
Lifetime Reliability: The patented MEMS technology is immune to the typical sensitivity drift found in traditional condenser microphones, backed by a lifetime warranty on the sensor element.
Integrated Self-Check: An inbuilt reference sound source (100 dB at 1 kHz) allows for automated remote system checks, ensuring the station is calibrated and operational without requiring a site visit.

Integrated Environmental Intelligence: Noise, Dust, and Weather

Modern planning conditions often require more than just decibel readings. The SV 307A acts as a central hub for multimodal environmental monitoring. By integrating weather and dust sensors, you can correlate noise spikes with environmental variables:

Wind Speed & Direction: Automatically filter out “false positives” caused by high wind speeds hitting the microphone.
Construction Compliance: Monitor PM2.5 and PM10 dust particles alongside Peak Particle Velocity (PPV) vibration and noise levels in a single, unified data stream.
Advanced Alarms: Set intelligent triggers. For example, receive an alert only when noise levels exceed a threshold and the wind is blowing towards a sensitive residential receptor.

Resilience in Harsh Environments

Designed for permanent outdoor installation, the SV 307A features a reinforced housing with an IP64 ingress protection rating. It is engineered to operate in extreme temperatures (-20°C to +50°C), with internal heating and cooling logic to protect the Class 1 electronics. Whether it is a coastal construction site or a high-traffic urban corridor, the SV 307A provides continuous, unattended “uptime” that traditional hand-held meters cannot match.

Remote Data Management with SvanNET

The complexity of long-term monitoring is managed through the SvanNET Remote Communication Service. This cloud-based ecosystem transforms raw data into actionable insights:

Live Audio Streaming: Listen to the “live” environment remotely to identify the character of a noise (e.g., distinguishing between a barking dog and industrial machinery) without leaving the office.
Automated Reporting: Generate daily, weekly, or monthly compliance reports that meet local authority requirements automatically.
Data Security: Using 4G connectivity and secure GPS time-synchronization, all data is stamped with precise location and time metadata, essential for forensic noise analysis.

Frequently Asked Questions

What is the advantage of a MEMS microphone for outdoor noise monitoring?

MEMS (Micro-Electro-Mechanical Systems) microphones offer superior long-term stability and environmental resilience compared to traditional ceramic or pre-polarized microphones. They are less susceptible to humidity and temperature fluctuations, ensuring your Class 1 measurements remain consistent over years of outdoor exposure.

Can the SV 307A trigger audio recordings based on noise levels?

Yes. The system supports advanced audio triggering. You can configure the station to record .wav files when specific dB thresholds are breached or at set time intervals. This allows for easy source identification during post-processing.

How is the system powered for long-term projects?

The SV 307A includes an internal Li-Ion battery providing up to 5 days of operation with the 4G modem active. For permanent installations, it can be powered via a mains AC supply (IP67 rated) or integrated with a solar panel for complete off-grid autonomy.

Is the data accessible via API for third-party software?

Yes, via the SvanNET service, data can be integrated into external platforms, making it ideal for Smart City initiatives or proprietary environmental dashboards.