- Model Nor103 - Sound Level Meter

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Being light weighted and extremely compact makes this the world’s smallest class 1 instrument. Very portable as it will fit in your pocket, yet it ensures you the reliability and precision required for a class 1 measurement. The perfect all-purpose tool for simple analysis of noise at work, environmental noise and basic product noise determination.

For example use Nor103 for noise measurements in bars and restaurants, during concerts and events or in your garage to check that exhaust noise from vehicles and motor-bikes are within local legal limits. It got a simplified interface with only 3 function keys and a clean graphical screen displaying large fonts and a big graphical dB “speedometer”. With its’ internal memory to store multiple results, and the low power consumption, Nor103 is a reliable and easy to use tool for your noise measurements.

  • Noise hazards in workplace
  • Environmental noise survey testing
  • Product noise testing
  • General purpose noise level meter

  • Class 1 Sound Level Meter IEC61672, JIS C1509-1
  • 30 to 137 dB RMS, 60-140 dB Peak C without range switching
  • Measure Lp, Leq, Lmax, LE and LCpeak.
  • Frequency range: from 10 Hz to 20 kHz
  • Frequency weighting: A and C
  • Time weighting: Fast / slow
  • Measurement durations: 1, 5, 10, 60 min.
  • Quick start up and easy operation

Standard compliance: Measurement Law IEC 61672-1:2013 class 1, CE mark (EMC Directive 2004/108/EC), WEEE Directive
Measurement functions: Instantaneous Sound level Lp, equivalent continuous sound level Leq,
Sound exposure level LE, Maximum sound pressure level Lmax
C weighting peak sound level LCpeak (when peak range is selected)
Microphone: 1/2-inch electret condenser microphone Model: UC-59
Sensitivity: -27 dB±2 dB (re.1 V/Pa)
Windscreen: Conforms to IEC 61672-1 Class 1 also with windscreen mounted
Measurement level range:
Wide range: A weighting: 30 dB to 137 dB, C weighting: 40 dB to 137 dB
Peak range: A weighting: 65 dB to 137 dB, C weighting: 65 dB to 137 dB
C weighting peak sound level: 68 dB to 140 dB
Total range: 32 dB to 137 dB (A weighting, 1 kHz)
Inherent noise level:
Wide range: A weighting: 21 dB or less, C weighting: 29 dB or less
Peak range: A weighting: 54 dB or less, C weighting: 54 dB or less
Frequency range: 10 Hz to 20 kHz
Frequency weighting: A and C
Time weighting: F (fast) and S (slow)
RMS detecting circuit: Digital processing
Sampling frequency: 40 kHz
Numeric display: 0.1 dB resolution
Bar graph: 30-130dB, resolution 5 dB, display update cycle 0.1 s
Power: Uses 2 size LR03 (ANSI AAA) batteries
Current consumption: Approx. 90 mA (when operating at 3 V)
Environmental conditions: ÷10°C to 50°C, 10% to 90% RH (No condensation)
Dimensions: 130 mm (H) × 63 mm (W) × 23.5 mm (D)
Weight: 105 g (incl. batteries)

*Preamplifier is an integrated part of instrument. Use of extension cable is not possible.

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