ST-15D Class 1 Sound Analyzer
Advanced Occupational Noise Measurements
Overview
Scarlet ST-15D integrates professional Class 1 sound level monitoring with a GPS analyzer that meets IEC and ANSI international standards. It is equipped with one-third octave band filters for detailed sound analysis. Precisely measure sound levels and detect noise sources with a single device.
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2.6’ Full-Color Screen
The 240x320 resolution display features a main menu with four quick-access options: measurement, setup, recall, and calibration
Microphone
1/2" pre-polarized condenser microphone features a removable preamplifier and offers a sensitivity level of -28dB
Outputs & Indicators
DC/AC, USB, and RS232 outputs are included for seamless data transfer and integration, along with LED indicators for clear visual feedback.
Why Choose ST-15D?
Designed for advanced occupational noise measurements.
IEC Certificate
Adhere to the highest standards for testing and conformity assessment
1/3 Octave Band
Provide detailed frequency analysis for precise identification
PC-Based Monitoring
View instant noise data with free Scarlet’s software, compatible on Windows PC
GPS Analyzer
Tag location of noise measurements for detailed environment analysis
Key Features
Overview
Reliable Measurement
ST-15D provides precise sound measurements with A, C, and Z frequency weightings, and F, S, and I time weightings. It supports simultaneous multi-index analysis and advanced 1/1 and 1/3 Octave Band analysis.
GPS Analyzer
Longitude & Latitude Data
ST-15D prints noise measurements and includes an integrated GPS analyzer for precise latitude and longitude data. Perfect for accurate navigation and detailed mapping.
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Measure environmental noise accurately with the ST-15D sound level meter
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International Standards
Sound Analyzer
Real-Time 1/3 Octave Band Analysis
ST-15D makes analyzing sounds easier with its 1/3 octave band feature. This tool breaks down complex noises into smaller parts, making it simpler to identify and understand different sound sources accurately.
Outdoor Kit
Built to be waterproof and featuring an anti-perching spike to prevent obstacles, this kit ensures smooth and accurate noise measurement operations.
Frequently Asked Questions
Find quick answers below, or visit our FAQ page for more.
Which class of sound level meter do I need?
Depending on your application, Class 1 is preferred for high-accuracy or legal use; Class 2 works for general needs.
Can the ST-15D record audio?
Audio recording is optional; when enabled, it saves sound data in WAV format for analysis.
Does the ST-15D have GPS functionality?
Yes, the built-in GPS analyzer allows to record noise location and measurements.
Add-Ons
Sound Calibrator
Calibrate your sound level meter periodically to ensure accurate measurements for critical assessments.
Instant Portable Printer
Print noise data on-site with our portable thermal printer, easily pair with your sound level meter.
Audio Recording
Record Sound Data and Save it into “WAVE” format
Specifications
- Performance
- Design
- Features
- Package List
- FAQ
- Download
| Item | Description |
|---|---|
| Fulfils standard | IEC 61260-1:2014 Class 1 |
| Main parameters of measurement | LFp, LSp, LIp, Leq1, Lpeak, Leq,T, LFmax, LFmin, LSmax, LSmin, LImax, LImin, SEL,Ts, Tm, Volt, E. |
| Measurement range | 20 dB to 142 dB (145 dB Peak) |
| Measurement run time | 1s to 99 h 59 m 59 s |
| Frequency range | 10 Hz to 20 kHz ± 1 dB (not including microphone) |
| Accuracy | ±0.7 dB |
| Analyzer | Statistical, 1/3 octave band, GPS |
| Optional upgrade | Integrating, 1/1 octave band, dosimeter function, FFT, audio recording |
| Item | Description |
|---|---|
| Dimensions | 260 x 80 x 30 mm |
| Display | 240 × 320 color screen, adjustable brightness, backlight can be closed |
| Display resolution | 0.1 dB |
| Weight | 0.35 kg (include batteries) |
| Printer | Thermal or dot-matrix bluetooth printer (optional) |
| Power supply | 24+ hrs battery life by 4xAA batteries |
| Application | Noise integrating measurement |
| Environment | Working Temperature: -10 to 50°C Storing; Temperature: -20 to 70°C; Relative Humidity: 25 to 90% |
| SD card | Optional |
| Features |
|---|
| • IEC-61672-2002 Class 1 |
| • 20 dB to 142 dB Measurement Range |
| • 10 Hz to 20 kHz Frequency Range |
| • Recording Function |
| • Modularize Design Provides 4 Sub Models |
| Package List |
|---|
| • ST-15D Class 1 sound level meter |
| • 1⁄2” prepolarized condenser microphone (pre-installed) |
| • Windscreen |
| • RS-232 cable |
| • 5V power adapter |
| • Mini USB cable |
| • AA batteries |
| • External GPS antenna |
| • User manual |
| • Calibration certificate |
| • Waterproof carry case |
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No formal training is needed. ST-15D features an intuitive interface, making it easy to use for professionals and beginners alike.
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Audio recording is an optional feature for the ST-15D. When equipped, it can record sound data and save it in WAV format, facilitating further analysis and documentation.
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Yes, the ST-15D includes a built-in GPS analyzer. This feature allows the device to record noise source & measurements. Check out this video to learn how to view the GPS information.
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An accurate noise measurement instrument that meets IEC 61672-1:2002 standards (or equivalent standards such as BS EN 61672-1:2003). It has tighter tolerances (+/- 1.9 dB at 1 kHz) compared to Class 2 (+/- 2.2 dB). Class 1 meters are ideal for measuring sound pressure, Leq, and peak sound pressure, often required by regulations like the UK’s Noise at Work.
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Your choice depends on the application:
Class 1: Preferred for environmental noise surveys, low noise levels, legal applications, and standards like ISO 20906:2009 for aircraft sound monitoring.
Class 2: Suitable for less demanding applications without strict accuracy requirements. -
Conduct field calibrations before and after each use. Additionally, have the device professionally calibrated annually to maintain compliance with standards.
Case Study:
Our Solution, Their Success
How ST-11D Helps Reduce Motorcycle Noise Pollution in Indonesia’s Traffic
Learn how the sound level meter helps Indonesian police traffic authorities tackle rising vehicle noise pollution nationwide.
Learn MoreWhere does Scarlet Sound Level Meter Apply
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