Extech Sound Level Meters — South Africa
Professional Extech sound level meters supplied by Ecotao — from quick single-range spot-checks to Type 2 dual-range survey meters and a real-time octave band analyzer, for occupational, environmental, industrial and product-testing noise measurement.
What is a sound level meter?
A sound level meter is a handheld instrument that measures sound pressure level in decibels (dB), using a calibrated microphone to convert air-pressure fluctuations into an electrical signal that is filtered, weighted and displayed as a reading. Extech's range, supplied by Ecotao, covers everything from quick single-range spot-checks to Type 2 dual-range survey meters and a real-time octave band analyzer, for occupational, environmental, industrial and product-testing noise measurement.
Two pieces of South African legislation make having the right meter important: the Noise Exposure Regulations under the OHS Act (Act 85 of 1993), which set an 85dBA noise-rating limit for an 8-hour working day; and SANS 10103:2008, which governs the measurement and rating of environmental noise. A Type 2 meter with A-weighting and Data Hold satisfies both frameworks for most routine compliance surveys.
The Extech Sound Level Meter Range
Five models covering general-purpose noise spot-checks through to statistical octave band analysis. Each product links directly to an enquiry email pre-filled with the model name and a spec sheet for download.
Best for: fast, general-purpose noise spot-checks where a formal Type 2 certificate isn't required.
- 40–130dB range with ±2dB accuracy and 0.1dB resolution
- A & C frequency weighting
- AC analog output for connecting to a recorder
- Records Max/Min values over time
- Auto power off and Max Hold functions
- 0.5″ (12.7mm) condenser microphone, tripod mountable
- Complete with 4 AAA batteries and microphone windscreen
Best for: sites requiring a verified, calibrated measurement — the kit arrives ready to use.
- 407732 meter, windscreen, calibration screwdriver and 9V battery
- 407722 Sound Calibrator (94dB) with its own 9V battery
- Supplied in a hard carrying case
- Dual-range Type 2 accuracy straight out of the box
Best for: the same dual-range Type 2 accuracy as the kit, for sites that already have access to a calibrator.
- Meets ANSI and IEC 651 Type 2 standards
- High and Low measuring ranges: 35–100dB (low) and 65–130dB (high)
- Data Hold and Max Hold functions
- Backlit LCD display for use in dimly lit areas
- Typical applications: community noise ordinances, workplace safety, audio installation, product noise certification
Best for: machine noise diagnostics and any measurement programme that requires a PC download of readings.
- Auto/Manual ranging from 30–130dB across 6 ranges with ±1.5dB accuracy
- A and C selectable frequency weightings, Fast and Slow response
- Background noise absorber mode filters ambient noise for machine-specific readings
- Large 3½ digit backlit display with analog bargraph
- RS-232 PC interface with optional software
- Optional microphone extension cable (407764-EXT) for enclosed or remote locations
Best for: diagnosing which frequency band a noise source dominates in, and producing statistical Leq/L90-style reports for environmental assessments.
- 20–130dB across 5 ranges, ANSI/IEC Type 2 — A, C and Z weighting
- Real-time octave band analysis with colour TFT display
- microSD card datalogging with date/time stamp
- USB interface for PC data transfer
- Statistical functions: Leq, Lmax, Lmin, L5–L99, SEL
- Optional microphone extension cable (407764-EXT) for enclosures and remote locations
- Complete with software, USB cable, 4×C batteries, windscreen, screwdriver, AC adaptor and case
Compare the Extech Sound Level Meter Range
Quick reference for selecting the right model based on range, standard, data output, and calibrator requirement.
← Scroll to see full table →
| Model | Range | Weighting | Standard | Data / PC | Calibrator |
|---|---|---|---|---|---|
| 407730 | 40–130dB, ±2dB | A & C | — | Max/Min hold, analog output | Not included |
| 407732-KIT | 35–130dB (dual range) | — | ANSI/IEC Type 2 | Data & Max Hold | 94dB calibrator included |
| 407732 | 35–100dB low / 65–130dB high | — | ANSI/IEC 651 Type 2 | Data & Max Hold | Optional (sold as kit) |
| 407750 | 30–130dB, 6 ranges, ±1.5dB | A & C | ANSI/IEC Type 2 | RS-232 PC interface | Not included |
| 407790A | 20–130dB, 5 ranges | A, C & Z | ANSI/IEC Type 2 | microSD logging + USB | Not included |
Where sound level meters are used
Noise measurement matters wherever sound levels affect health, compliance, productivity or product quality.
Workplace noise compliance
Under the OHS Act, employers must establish whether employees are exposed at or above the 85dBA limit and document the measurement programme. A Type 2 meter with Data Hold gives a repeatable, defensible reading.
Environmental noise & ordinances
Mines, construction sites, and event venues must demonstrate compliance with SANS 10103 daytime and night-time limits. A meter with A-weighting and a low-end range down to 20dB, such as the 407790A, covers environmental readings.
Machine & equipment noise
The 407750's background noise absorber mode filters ambient sound for machine-specific diagnostics. The 407790A's octave band display pinpoints which frequency a machine dominates — guiding acoustic treatment.
Construction site monitoring
Spot-check construction noise against municipal limits. A portable Type 2 meter — especially the 407732 or 407750 — gives a credible, documented reading for dispute resolution.
Audio & PA system installation
Verify speaker levels and balance for venue PA systems, broadcast installations, and recording environments using consistent, repeatable dB readings.
Product noise certification
Manufacturers testing product sound emissions for regulatory labels or customer specifications need a consistent, traceable methodology — the Type 2 range supports this.
Frequently asked questions about sound level meters
Common questions from OHS practitioners, engineers, and facility managers — answered clearly.