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Sound Level Meter

Nor103 Sound Level Meter

Nor103 Class 2 sound level meter: simple, reliable instrument for quick noise level checks and basic occupational noise screening.

Overview

The Nor103 is a simple, affordable Class 2 sound level meter designed for basic noise level measurements where quick readings and general noise awareness are the primary requirements. With its compact pocket-size design and one-button operation, the Nor103 enables anyone from HSE officers and facility managers to maintenance technicians to obtain immediate noise level readings without specialized …

Key Features

  • IEC 61672-1 Class 2 accuracy for general-purpose noise measurement
  • Compact pocket-size design weighing only 180 g
  • Simple one-button operation requiring no specialized training
  • Max hold function for capturing peak noise levels during surveys
  • AC output for connection to external recording and analysis devices
  • Exceptionally long battery life exceeding 50 hours from single 9V battery
  • A and C frequency weighting for different assessment requirements
  • Fast and Slow time weighting selection

Applications

  • Quick noise level checks and walk-through screening surveys
  • Workplace noise awareness assessments and safety culture building
  • Entertainment venue and event noise spot checks
  • Educational demonstrations in schools and training programs
  • Home and residential noise assessment
  • Machinery and equipment noise spot checks during maintenance

Technical Specifications

  • Model: Nor103
  • Standards: IEC 61672-1 Class 2
  • Frequency Range: 31.5 Hz – 8 kHz
  • Measurement Range: 30 dB(A) to 130 dB(A)
  • Dynamic Range: 100 dB
  • Frequency Weighting: A, C
  • Time Weighting: F, S
  • Display: Digital LCD with bar graph
  • Max Hold: Yes
  • Interface: AC output for external recording
  • Power: 9V battery or external DC
  • Battery Life: > 50 hours

Frequently Asked Questions

  • What is the difference between Class 1 and Class 2?
    Class 1 instruments have tighter frequency response tolerances and are required for most regulatory and legally defensible noise measurements. Class 2 instruments have wider tolerances and are suitable for screening, general awareness, and non-critical applications where indicative noise levels are sufficient.
  • Can I use the Nor103 for official regulatory measurements?
    Class 2 accuracy is accepted for some less stringent applications, but most environmental, occupational, and building acoustics regulations require Class 1 instruments. The Nor103 is best used for screening, awareness, and preliminary assessments that may then be followed up with Class 1 measurements.
  • Is the Nor103 suitable for workplace noise screening?
    Yes, the Nor103 is an excellent screening tool for identifying potentially hazardous noise areas in workplaces. It allows supervisors and HSE officers to quickly survey noise levels and determine where detailed Class 1 assessments with instruments such as the Nor145 or Nor150 should be conducted.

Application Guide

The Nor103 Sound Level Meter belongs to the Norsonic Sound Level Meter range. See the Sound Level Meter application guide for system configuration, compatible accessories, and applicable measurement standards.

Related Norsonic Products

Why Norsonic?

  • Manufactured in Norway — decades of acoustic measurement heritage; all instruments designed and built in Norsonic AS, Lierskogen, Norway
  • IEC 61672 Class 1 — highest accuracy class for professional and regulatory acoustic measurement
  • International type approvals — PTB (Germany) and LNE (France); accepted by environmental authorities across the region
  • 3-year manufacturer warranty — covers parts and labour; Norsonic Asia authorized service center support throughout the region
  • Open data formats — .nox files work with NorReview and can be exported to CSV, Excel, and third-party analysis software

Calibration and Compliance

  • All Norsonic instruments require periodic IEC 61672-3 calibration — Norsonic Asia provides factory-authorized calibration services with full DANAK-traceable certificates
  • Calibration interval: 1 year for ISO 17025 accredited laboratories; 2 years for field instruments in non-accredited applications
  • Field calibration check: use an IEC 60942 Class 1 sound calibrator (94 dB or 114 dB) before and after each measurement session
  • Loaner instruments available during calibration to minimize project downtime — contact Norsonic Asia for loaner availability

Availability & Regional Support

Available from Norsonic Asia — the factory-authorized distributor for ASEAN, GCC, and South Asia. Instrument supply includes 3-year manufacturer warranty, factory-authorized calibration services, operator training, and after-sales technical support.

  • Typical lead time: 3–6 weeks from order confirmation (ex-factory Norway)
  • Countries served: Singapore, Malaysia, Thailand, Vietnam, Philippines, Indonesia, UAE, Saudi Arabia, Qatar, Kuwait, India, Bangladesh, Sri Lanka, and more
  • Technical support: English and Arabic; response within 1 business day

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