Sound Meter - Type 1 Datalogger with SD Card, NIST Certified

Sper 860071C Professional-Grade Sound Level Meter & Datalogger with NIST Traceable Calibration

Elevate your acoustic measurements with the Sper 860071C, a high-precision, Type 1 Sound Level Meter engineered for demanding professional applications. This robust instrument delivers unparalleled accuracy and reliability, backed by a comprehensive NIST-traceable calibration, ensuring compliance and confidence in your data.

Guaranteed Accuracy & Certification: Each Sper 860071C meter undergoes rigorous in-house calibration and testing to confirm it meets or surpasses all published specifications. Your purchase includes complete documentation for audit trails and quality assurance:

• Individual Serial Number: For unique device identification.
• Certification Label: Clearly visible compliance marking.
• Certification Testing Report: Detailed results verifying performance against NIST-traceable standards.

Designed for Critical Applications: Meeting the stringent requirements of IEC 61672-1:2013 Class 1 and ANSI S1.4-2014 standards, the 860071C is the definitive tool for:

• Environmental Noise Assessments: Comprehensive urban and industrial soundscape analysis.
• Occupational Health & Safety (OSHA) Compliance: Accurate noise exposure monitoring for workplace safety.
• Industrial Noise Control: Identifying and quantifying noise sources in manufacturing and operational settings.
• Acoustic Engineering & Research: Precision measurements for design, analysis, and scientific studies.

Seamless Data Logging & Analysis: Equipped with real-time data logging capabilities and an included 16GB SD card, this meter simplifies the capture and storage of sound pressure levels (SPL) and equivalent continuous noise levels (Leq). Data is conveniently saved in a universal CSV format, complete with precise timestamps (year, month, date, hour, minute, second), enabling effortless download and analysis in standard spreadsheet software like Microsoft Excel, eliminating the need for proprietary software.

Unrivaled Features for Precision & Versatility:

• Advanced Real-Time Data Logger: Capture and save measurement data directly to an SD memory card. Adjustable sampling rates (1 to 3600 seconds) in Auto Mode or instant saves with a single button press in Manual Mode ensure flexibility for any monitoring scenario.
• Comprehensive Measurement Modes: Measures both instantaneous SPL and equivalent continuous noise levels (Leq). Features clear over-and-under range indicators to prevent data clipping.
• Dual Frequency Weighting (A & C): Select 'A' weighting for environmental and workplace noise evaluations, closely mimicking human hearing response. Utilize 'C' weighting for analyzing peak sound pressure levels and machinery noise, providing a flatter response across the frequency spectrum.
• Selectable Time Weighting (Fast & Slow): Adapt to varying noise characteristics with Fast (125ms) or Slow (1s) time constants for versatile noise assessment, ideal for both transient and steady-state sounds.
• Exceptional Accuracy & Wide Dynamic Range: Achieve Class 1 accuracy (e.g., ±0.7 dB at 1 kHz), ensuring highly precise and repeatable results. Covers a broad frequency spectrum from 31.5 Hz to 16 kHz and an expansive dynamic measurement range of 30 to 130 dB.
• Intuitive User Interface: A large, backlit dot-matrix LCD provides crystal-clear visibility in all lighting conditions. Essential functions include Data Hold, Peak Hold (to capture maximum transient values), and Max/Min recording for identifying extreme noise events. Auto power-off conserves battery life.
• Robust Connectivity: Features an RS232/USB PC interface (cables optional) for real-time data streaming or efficient batch downloads, enabling advanced data management and integration with other analytical platforms.
• High-Stability Microphone: Equipped with a precision ½ inch electric condenser microphone, ensuring consistent and accurate acoustic capture.
• External Calibration Support: Includes an external calibration VR for easy adjustment and field verification with an optional sound calibrator (e.g., Sper SC-942).
• AC Output: Provides a 0.5 Vrms AC output for direct connection to external devices such as frequency analyzers, oscilloscopes, or data acquisition systems for further acoustic analysis.
• Flexible Power Options: Operates on (6) standard AA batteries (included) for portable use, or an optional DC 9V adapter for extended, stationary monitoring.

What's in the Box? Your Sper 860071C package is delivered ready for action:

• Sper 860071C Type 1 Sound Level Meter
• Durable Hard-Shell, Foam-Lined Carrying Case
• 16GB SD Card
• Fold-Out Desk Stand
• User Manual
• (6) AA Batteries

Recommendations for Optimal Results: For the most stable and accurate long-term monitoring, the instrument includes a built-in tripod mount. We strongly recommend utilizing a tripod to minimize measurement variations caused by hand movements and to ensure consistent positioning.

Technical Specifications:

• Dimensions: 245 x 68 x 45 mm (9.6 x 2.7 x 1.8 inches)
• Weight: 323 g (0.71 lb)
• Display: 51 x 30 mm dot-matrix LCD with vibrant green backlight
• Resolution: 0.1 dB
• Operating Conditions: 0 to 50°C (32 to 122°F), relative humidity <85%
• Internal Circuitry: Custom one-chip LSI microprocessor for enhanced stability and performance
• Frequency Response Accuracy (at 94 dB):
  • 31.5 Hz: ±1.5 dB
  • 1 kHz: ±0.7 dB
  • 8 kHz: +1.5 dB, -2.5 dB
  • Fully compliant with ANSI S1.4-2014 / IEC 61672-1:2013 Class 1 standards.