SOUNDTEK ST-109R Class 1 Integrating Sound Level Meter with Data Logger

SOUNDTEK ST-109R Class 1 Integrating Sound Level Meter in Sri Lanka

IEC 61672-1 Class 1 Meter for Workplace, Environmental and Product Noise Assessment

The SOUNDTEK ST-109R Class 1 Integrating Sound Level Meter is designed for precise noise measurement that follows IEC 61672-1:2002 Class 1. It measures from 30 dB to 130 dB (A) and records Leq, SEL, maximum, minimum, and C-weighted peak levels. This makes it suitable for assessing noise at workplaces, evaluating environmental noise, and testing product noise in Sri Lanka.

Discover our complete selection of Sound Level Meters – specifications, features, and noise testers in Sri Lanka!

A ½-inch pre-polarized condenser microphone, A/C/Z frequency weighting, and Fast, Slow, Impulse, and Peak time weighting give you full control over your measurements. For long surveys, you can set integration times from 10 seconds up to 24 hours, store readings on a micro SD card, and transfer data to a PC through USB. The meter also provides analog and RS-232 (TTL) output.

Technical Specifications

Standards: IEC 61672-1:2002 Class 1 | IEC 60651:1979 Type 1 | IEC 60804:2000 Type 1

Measurement Range: 30–130 dB (A) | 35–130 dB (C) | 40–130 dB (Z) | Dynamic range: 60 dB

Level Ranges: Low 30–90 dB | Medium 50–110 dB | High 70–130 dB

Peak Measurement Range: 70–133 dBC

Measurement Items: Lxyp, Lxmax, Lxmin, Lxeq, LAE, LCpeak

Frequency Range: 20 Hz–16 kHz | Weighting: A / C / Z

Time Weighting: Fast, Slow, Impulse, Peak

Integration Time: Manual, 10 s, 1 min, 5 min, 10 min, 30 min, 1 h, 8 h, 16 h, 24 h

Microphone: ½" pre-polarized condenser microphone, 50 mV/Pa | Thermal noise: ≤28 dBA

Outputs: DC 10 mV/dB | AC 1 Vrms (±10%) at 130 dB each range | USB | RS-232 (TTL)

Display: Two-row LCD, max 1999 | Refresh rate: 1 time per second | Overload indication: OVER / UNDER

Power: 4 x AA batteries (approx. 30 hours) or 9 V DC adapter

Size and Weight: 285 x 90 x 39 mm | Approx. 500 g

Key Features

Integrating Measurement: Leq, SEL, and peak modes for noise exposure and compliance assessments

Data Logging: Stores up to 35,000 records internally, with auto backup to a micro SD card (up to 32 GB, FAT16/FAT32)

Calibration: 94 dB at 1 kHz field calibration, adjustable within 91–97 dB

Remote Microphone Option: Detachable microphone and preamp for extension-cable measurements, reducing reflection effects

Convenience: Backlight, data hold, auto power-off (up to 99 minutes), and a start-up time under 10 seconds

Software: PC software available from the manufacturer for downloading and analysing records

Wind Protection: Windscreen ball included for outdoor measurements in windy conditions

Applications

Evaluation of environmental noise

Measurement of noise at workplaces

Assessment of product noise

Package Includes

1 x SOUNDTEK ST-109R Integrating Sound Level Meter

Windscreen ball

USB cable (Mini-B)

AC to DC adapter (9–12 V / 500 mA)

4 x 1.5V AA alkaline batteries

English user manual

Downloads

📄 Download SOUNDTEK ST-109R User Manual