ST-12D Class 1 Integrating SLM
ST-12D Class 1 Integrating SLM
ST-12D complies with the Class 1 IEC 61672-1:2013 standard, designed for occupational noise measurement and research. It features a wide measurement range of 25 to 140 dB and is capable of measuring parameters such as Leq, Lpeak, Lmax, Ln, and more. The ST-12D also supports a spectrum analyzer with optional 1/1 and 1/3 octave band filters, enabling real-time frequency analysis for precise noise assessments.
Technical Specifications
ST-12D Class 1 Integrating SLM
SV 977D is a high-performance optical speed sensor designed for precise, non-contact vehicle speed measurement using advanced Doppler technology. It provides high-frequency data output with excellent accuracy and repeatability, ensuring reliable performance across various road surfaces and environmental conditions.
The sensor supports real-time data acquisition and seamless integration with CAN bus and data logging systems. With its robust construction, low latency, and high resolution, SV 977D is ideal for automotive testing, braking analysis, and vehicle dynamics evaluation.
Key Features
- Class 1 IEC 61672-1:2013 compliant for high-precision noise measurement
- Wide measurement range of 25 to 140 dB for various environments
- Measures multiple parameters such as Leq, Lpeak, Lmax, Ln and more
- Optional 1/1 and 1/3 octave band filters for real-time frequency analysis
- Full-colour 2.4” display with clear data visualization and graphs
- High accuracy measurement with ±0.5 dB precision
- Multi-constellation frequency weighting options (A, C, Z) and time weighting modes
- Data logging and audio recording (MP3/WAV) with large storage support
- USB-C, serial and AC/DC interfaces for easy connectivity
- Dedicated PC software for data analysis, reporting and visualization
Applications
Vehicle speed and performance testing
Brake testing and stopping distance analysis
Automotive research and development (R&D)
Vehicle dynamics and motion analysis
ADAS and safety system validation
Testing in varying road and weather conditions
Real-world driving data collection
Integration with CAN-based systems for diagnostics
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Fulfils standard
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Main parameters of measurement
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Measurement range
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Frequency range
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Accuracy
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Time weighting
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Integrating time
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Audio recording
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Refresh rate
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Dimensions
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Weight
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Display
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Display resolution
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Output interface
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Power supply
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Operation time
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Operation environment
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Storage capacity
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IEC 61672-1: 2013 Class 1
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Easy-to-use interface
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2.4" full-color display
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Synchronous multi sound analyzers
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Leq value with A/C/Z frequency weightings
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Class 1 Sound Level Meter
Designed for accurate noise measurements in various applications
High Precision
25 – 140 db wide range compliant with Class 1 IEC 61672-1:2013 standard
Full Capabilties
Integral & statistical calculations, dosimeter, and 1/1 & 1/3 octave band (optional)
Large Storage
Data logging and audio recording in MP3/WAV format with a 64 GB SD card
Parallel Analysis
Measures and displays the Leq value (A/C/Z frequency)
Audio Recording
ST-12D offers MP3/WAV audio recording formats with file export capability. Enhance recording efficiency with its trigger mode, activating recording only when sound levels reach a specified limit, effectively optimizing memory usage.
Optional 1/1 & 1/3 Octave Band Analysis
Experience precision in sound assestment with the optional 1/1 and 1/3 octave band analysis features for the ST-12D. These upgrades split noise into smaller frequency bands, helping you identify the noise source.
On-the-Go Waterproof Case
Carry your ST-12D in our durable-design waterproof case, which protects the device and all its accessories, ensuring safe transportation wherever you go.
Add-ons
Sound Calibrator
Calibrate your sound level meter periodically to ensure accurate measurements for critical assessments.
Instant Portable Printer
Print noise data on-site with our portable thermal printer, easily pair with your sound level meter.
Outdoor Kit
All-weather resistance with an anti-perching spike, the outdoor kit ensures obstacle prevention for reliable noise measurements.
Have Questions? Get in Touch
What is the ST-12D Class 1 Integrating SLM and where is it used?
ST-12D Class 1 Integrating SLM is a high-precision acoustic measurement instrument designed for environmental noise monitoring, automotive NVH testing, industrial noise analysis, and compliance measurements. Being a Class 1 meter, it meets the highest accuracy standards for professional use.
What does “Class 1” mean in a sound level meter?
Class 1 refers to compliance with international standards such as IEC 61672-1, which defines tight tolerance limits and high measurement accuracy. Class 1 meters are typically used for certification, legal compliance, and laboratory-grade measurements, whereas Class 2 is used for general-purpose monitoring.
What is meant by an “integrating” sound level meter?
An integrating SLM measures sound energy over time and calculates parameters such as Leq (Equivalent Continuous Sound Level), SEL (Sound Exposure Level), Lmax, and Lmin. This is essential for evaluating fluctuating noise environments like traffic or industrial operations.
What are the key features of the ST-12D SLM?
Key features typically include:
- Wide measurement range with high dynamic accuracy
- Frequency weightings (A, C, Z) and time weightings (Fast, Slow, Impulse)
- Data logging capability for long-term noise monitoring
- USB/PC connectivity for analysis and reporting
- Compliance with international acoustic standards
Where can the ST-12D be applied in automotive and industrial testing?
The ST-12D is widely used for:
- Pass-by Noise (PBN) testing
- Vehicle cabin noise (NVH) analysis
- Industrial workplace noise assessment
- Environmental and community noise monitoring
- Regulatory compliance and certification testing