ST-11D Class 1 Sound Level Meter
ST-11D Class 1 Sound Level Meter
ST-11D sound level meter adheres to the Class 1 IEC 61672:2013 standard and measures noise levels from 27 to 140 dB. It delivers precise readings of equivalent continuous sound level and sound exposure for selected time periods. Ideal for occupational noise assessments, it ensures compliance with Noise at Work Regulations and OSHA standards. For advanced 1/1 and 1/3 octave band analysis, consider the ST-12D.
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
- IEC 61672-1:2013 Class 1 compliant for high-precision noise measurement
- Wide measurement range of 27 dB to 140 dB for industrial and environmental use
- High accuracy of ±0.7 dB with 0.1 dB resolution
- Measures Leq and other sound parameters with A, C and Z frequency weightings
- Data logging and recording functionality for storing measurement data
- USB and RS232 output for easy data transfer and PC connectivity
- 128 × 64 OLED display for clear and user-friendly data visualization
- 1/2″ pre-polarized condenser microphone for accurate sound capture
- Suitable for occupational noise assessment and regulatory compliance (OSHA, Noise at Work)
- Compact and flexible operation (handheld or tripod-mounted)
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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Dimensions
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Display
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Weight
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Application
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Power supply
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IEC 61672:2013 Class 1
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27 dB to 140 dB wide measurement range
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±0.7 dB high accuracy & 0.1dB resolution
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Leq value with A/C/Z/B frequency weightings
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Data logging & record functions
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RS232 & USB data output
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Why Choose ST-11D?
Accurately measure and monitor noise levels in the workplace with ST-11D sound level meter, ensuring compliance with safety standards and protecting employee health.
High Precision
Comply with IEC 61672-1:2013 Class 1 with ±0.7 dB high accuracy
Comprehensive Metrics
Measures & displays Leq values with adjustable A/C/Z frequency weightings
Easy Data Logging
Store large groups of data and easily download to your Windows computer
Wide Measurement
27-140 dB measurement range, competent for rigorous industrial use
Data Export to Windows PC
Equipped with 2GB of internal memory for data logging. It easily transfers data to a Windows PC via USB cable, capturing essential metrics such as Start/Stop Time, %Dose, and TWA.
Quality Assurance & Packaging
Every ST-11D undergoes rigorous testing to ensure top-quality performance before shipping. Each unit is carefully packed in a waterproof briefcase to safeguard all essential components during transit. This meticulous process guarantees that your sound level meter arrives in perfect condition, ready for reliable use.
Instant Data Print-out
For immediate printouts of your ST-11D noise measurements, a Bluetooth printer is available for separate purchase. This convenient accessory ensures you can quickly and easily print your data on-site.
Have Questions? Get in Touch
What is the SST-11D Class 1 Sound Level Meter and where is it used?
SST-11D Class 1 Sound Level Meter is a high-accuracy acoustic measurement instrument designed for environmental noise monitoring, occupational safety, and industrial noise analysis. It is ideal for applications where precision and compliance with international standards are required.
What accuracy standard does the SST-11D comply with?
The SST-11D complies with IEC 61672-1:2013 Class 1 standard, ensuring high-precision measurements with tight tolerance limits (±0.7 dB). This makes it suitable for legal compliance, certification, and professional acoustic studies.
What measurement capabilities does the SST-11D offer?
The device measures key acoustic parameters including:
- Leq (Equivalent Continuous Sound Level)
- SEL (Sound Exposure Level)
- Lmax, Lmin, Peak levels
- TWA, %Dose, and statistical values (Ln)
It uses integrating algorithms to evaluate sound energy over time, which is critical for occupational noise assessment.
What is the measurement range and frequency range of SST-11D?
The SST-11D offers:
- Measurement range: 27 dB to 140 dB
- Frequency range: 10 Hz to 20 kHz
This wide range allows it to handle both low-level environmental noise and high-intensity industrial noise effectively.
What features make SST-11D suitable for field and long-term monitoring?
Key features include:
- Built-in data logging and recording functions
- USB and RS232 connectivity for data transfer
- High-stability condenser microphone
- Portable and rugged design for field use
- Capability to function as sound level meter + noise dosimeter + data logger
These features make it ideal for continuous monitoring and compliance reporting.