Larson Davis 720 Noise Dosimeter - Handheld Sound Level Meter with Class 2 Accuracy

Larson Davis 720 Noise Dosimeter - The Larson Davis LD 720 handheld device has dual functionality: it serves as both an integrating sound level meter and a sophisticated noise dosimeter.

The LD 720 features a robust 1/2" electret microphone that not only makes the device cost-effective but also highly resistant for use in hazardous environments.

The instrument is suitable for sound level and integrating sound level measurements, performing true RMS and dual peak detection simultaneously. The LD 720 is equipped with slow, fast, and impulse detection capabilities, as well as A and C frequency-weighted filters. The device complies with the Class 2 accuracy specifications of IEC and ANSI standards for noise measurement.

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

• Class 2 integrating sound level meter
• Compliance (standards):
  • ANSI S1.4-1983 Type 2
  • ANSI S1.25-1991 Type 2
  • IEC 651 Type 2
  • IEC 804 Type 2
  • 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 exposure, projected exposure, Ln (1% ... 99%) Noise exposure (Pa²H) Histogram Sound level trend Peak events
• Operating modes: fast, slow, and impulse detection
• Evaluation: real-time true RMS and simultaneous dual peak detector
• Weighting: A and C frequency-weighted filters
• Microphone: built-in 1/2" electret microphone with 1 m cable
• 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)
• Size/weight: 75 x 200 x 25 mm / 326 grams
• Temperature range: -10 ... 50°C