ST-25D Class 2 Sound Analyzer
ST-25D Class 2 Sound Analyzer
ST-25D is the Class 2 sound analyzer that complies with IEC and ANSI standards. Ideal solution for detailed sound analysis with accurate sound level measurements and identify noise source with single device. The ST-25D is the perfect solution for environmental noise measurement, featuring built-in data logging and a comprehensive statistical analyzer.
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 2 sound analyzer compliant with IEC and ANSI standards for reliable noise measurement
- Wide measurement range of 28 dB to 133 dB for environmental and occupational noise analysis
- Supports A, C and Z frequency weightings with F, S and I time weightings
- Advanced 1/1 octave band analysis for detailed frequency breakdown (optional)
- Multi-parameter and statistical analysis including Ln values (L1, L5, L10, L50, L90, etc.)
- Built-in data logging with WAV audio recording capability
- Real-time monitoring software for data visualization and analysis
- 2.6” full-colour display with intuitive interface and quick-access menu
- Multiple connectivity options including USB, RS232, AC/DC outputs for easy integration
- Flexible operation (handheld or tripod-mounted) for different testing scenarios
- Optional features such as GPS, FFT, dosimeter and octave band upgrades
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
|
Fulfils standard
|
Main parameters of measurement
|
Measurement range
|
Measurement level
|
Frequency range
|
Optional upgrade
|
Power supply
|
Environment
|
|---|---|---|---|---|---|---|---|
|
28 dB - 133 dB Wide Measurement Range
|
IEC 61252:2002 & IEC 61672
|
±1dB High Accuracy & 0.1dB Resolution
|
Leq Value with A/C/Z/B Frequency Weightings
|
|---|
Why Choose ST-25D?
IEC Certificate
Adhere to the highest standards for testing and conformity assessment
Recording
Record Sound Data and Save it into “WAVE” format
Management
Real time monitoring software(Windows)
28-133 dB
Wide measurement range
Reliable Statistical Analysis
ST-25D provides detailed insights with up to 28 statistical Ln% values, including L1, L5, L10, L50, L90, and L95 for comprehensive sound level assessments.
Outdoor Kit
Built to be waterproof and featuring an anti-perching spike to prevent obstacles, this kit ensures smooth and accurate noise measurement operations.
Have Questions? Get in Touch
What is the ST-25D Class 2 Sound Analyzer and where is it used?
ST-25D Class 2 Sound Analyzer is a professional-grade acoustic measurement device designed for environmental noise monitoring, occupational noise assessment, and general-purpose sound analysis. It combines sound level measurement with statistical and frequency analysis in a single instrument.
What does “Class 2” mean in the ST-25D?
Class 2 indicates compliance with IEC 61672 standards for sound level meters, offering reliable accuracy for general industrial, environmental, and workplace noise measurements. While not as precise as Class 1, it is widely used where legal-grade certification is not mandatory.
What are the key measurement capabilities of the ST-25D?
The ST-25D measures a wide range of acoustic parameters including:
- Leq, SEL, Lmax, Lmin, Peak levels
- A, C, Z frequency weightings
- Fast, Slow, Impulse time weightings
- Statistical analysis (Ln values like L10, L50, L90)
It also supports 1/1 octave band analysis (optional) for identifying noise sources.
What is the measurement range and accuracy of ST-25D?
The device offers a wide measurement range of 28 dB to 133 dB (up to 141 dB peak) with ±0.7 dB accuracy and 0.1 dB resolution, making it suitable for both low-level and high-intensity noise environments.
What advanced features make ST-25D suitable for analysis applications?
Key advanced features include:
- Built-in data logging with WAV audio recording
- Real-time PC software (ScarletSound) for monitoring and reporting
- Optional GPS tagging for location-based noise mapping
- FFT, octave band, and dosimeter functions (optional upgrades)
These capabilities make it ideal for detailed noise analysis and long-term monitoring.