Larson Davis 812 Sound Level Meter - Integrating Handheld Sound Level Meter with Class 1 Accuracy

Larson Davis 812 Sound Level Meter - The Larson Davis LD 812 handheld instrument has dual functionality: it is a Class 1 integrating sound level meter and a high-performance sound level meter.

The LD 812 instrument is suitable for sound level measurement and integrating sound level measurement, performing true RMS value calculation and dual peak detection simultaneously. The LD 812 offers slow, fast, and impulse detection, as well as A and C frequency weighting. The instrument complies with the Class 1 integrating sound level meter specifications of IEC and ANSI standards.

• Sound level measurement
• Community noise surveys
• Environmental noise monitoring
• Statistical analyses
• Traffic noise / pass-by noise measurement
• Industrial process noise assessment

• Class 1 integrating sound level meter
• Compliance (standards):
  • ANSI S1.4-1983 Type 1
  • ANSI S1.25-1991 Type 1
  • IEC 651 Type 1
  • IEC 804 Type 1
  • 86/188/EEC directive
  • IEC/TC-29 directive
• Dynamic range: 110 dB
• Long-term data logging capabilities: Interval Sound level trend Event history
• Memory: 64 kB
• Display: Leq, Lmax, Lmin, TWA, SEL, projected SEL, Ln (1% ... 99%) Sound exposure (Pa²H) Histogram Sound level trend Peak events, Ldn
• Operating modes: fast, slow, and impulse detection
• Evaluation: real-time true RMS calculation and simultaneous dual peak detector
• Weighting: A and C frequency weighting filters
• Microphone pre-polarization: 0 V, 28 V, or 200 V (for condenser microphones)
• Output: AC/DC, configurable
• Interface: RS-232
• Power supply: 9 V battery (typical operation time: 20 hours) or optional external power supply (7 ... 16 V DC)
• Dimensions/weight: 76 x 330 x 25 mm / 370 grams
• Temperature range: -10 ... 50°C