ST-25D

ST-25D

 The ST-25D integrates a professional Class 2 sound level monitoring system, compliant with IEC and ANSI standards.
It features an integration function for detailed sound analysis. It measures sound level and identifies the noise source with a single device.

The ST-25D is an ideal tool for environmental noise measurement, equipped with built-in data logging and a statistical analyzer. It offers detailed statistical analysis of recorded sound level measurement data. It has up to 28 Ln% statistical values. Each statistical analyzer has different levels at L1, L5, L10, L50, L90, L95.

Monitor real-time noise measurement data and export historical data for further analysis on your computer using Scarlet Sound software.

ScarletSound software is compatible with Windows PCs. Install the software on your computer and connect the ST-25D to the computer via USB cable.

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ModelST-25D Sound Analyzer
Meets StandardIEC 61672 Class 2
Dimensions260 x 80 x 30 mm
Display240×320 color screen, adjustable brightness, switchable backlight
Screen Resolution0.1 dB
Frequency Range20 Hz ~ 12.5 kHz ± 1 dB (excluding microphone)
Measurement LevelZ(FLAT): 38 ~ 130dB
C peak: 145dB
Z(FLAT): peak: 145dB
Measurement Range28 dB-133 dB (141 dB peak)
Main Measurement ParametersLFp, LSp, LIp, Leq1, Lpeak, Leq,T, LFmax, LFmin, LSmax, LSmin, LImax, LImin, SEL,Ts, Tm, Volt, E.
Accuracy±0.7 dB
Weight0.35 kg (batteries included)
ApplicationNoise integration measurement
Power Supply4×AA battery or external power supply
EnvironmentOperating temperature: -10 ~ 50°C Storage temperature: -20 ~ 70°C
Statistical Analysis FunctionMeasurement index: Lxyp, Lxeq, 0.5 s, Lxeq, T, Lxymax, Lxymin, Lxyeq T, SEL, Ln at least: 1, 5, 10, 50, 90 with 0.1 dB resolution, SD
Note: x is A, C, Z y is F, S, I n is 1~99
24-hour measurement index: Ld, Ln, Ldn.
Audio RecordingRecords audio data and saves it in "WAVE" format
SD CardIncluded
Integration FunctionLxyi, Lxyp, Lxeq,t, Lxeq,T, Lxmax, Lxmin, Lxpeak LAE, LC-A, SEL
Note: x is A, C, Z, y is F, S, I
GPSLongitude, latitude, wind speed, distance, direction, and time calibration (optional upgrade)
1/1 OTTOptional upgrade
Dosimeter FunctionLAsp, LASMAX, LASMIN, TWA, LEX 8h, LCpeak, LZpeak, LAeq, T, LAVG, DOSE
(optional upgrade)
FFT Analysis
Sampling rate: 48 kHz, 24 kHz, 12 kHz, 6 kHz, 3 kHz
Measurement parameters: MAX, MIN, LeqT
(optional upgrade)
PrinterBluetooth thermal or dot-matrix printer (optional)

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