ST-25D

Occupational Noise Measurements

Scarlet ST-25D integrates professional class-2 sound level monitoring that complies with IEC and ANSI standards.
It is equipped with the integration function for detailed sound analysis. Measure sound level and identify noise source with one device.

Class 2 Sound Analyzer

IEC Certificate
The latest international standards
Recording
Record Sound Data and Save it into “WAVE” format
Management
Real time monitoring software(Windows)
28-133 dB
Wide measurement range

Precise Statistical Analysis

ST-25D is an ideal environmental noise measuring device with built-in data recording and statistical analyzer.

It offers a detailed statistical analysis of the logged sound level measurement data. It has up to 28 statistical Ln% values. Each statistical analyzer has several levels at L1, L5, L10, L50, L90, L95.

Precise Statistical Analysis

ST-25D is an ideal environmental noise measuring device with built-in data recording and statistical analyzer.

It offers a detailed statistical analysis of the logged sound level measurement data. It has up to 28 statistical Ln% values. Each statistical analyzer has several levels at L1, L5, L10, L50, L90, L95.

Smart Software
for Sound Data Management

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

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

Smart Software
for Sound Data Management

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

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

Optional Add-On

GPS analyzer
Locate Noise Source with GPS
Instant Data Printout
Directly print data reports with portable high speed printer
Class-2 Calibration
Calibrate device accurately on your own using Scarlet calibrator

Where does Scarlet Sound Level Meter Apply

Construction
Orchestras
Road Construction
Airport
Police Force
Any Fields Care About Noise Dose

Specifications

ModelST-25D sound analyzer meter
Fulfils StandardIEC 61672 Class 2
Dimensions260 x 80 x 30 mm
Display240×320 color screen, adjustable brightness, backlight can be closed
Display Resolution0.1 dB
Frequency Range20 Hz ~ 12.5kHz ± 1 dB (not including microphone)
Measurement LevelZ(FLAT): 38 ~ 130dB
C peak: 145dB
Z(FLAT): peak: 145dB
Measurement range28dB-133dB (141dB Peak)
Main Parameters of MeasurementLFp, LSp, LIp, Leq1, Lpeak, Leq,T, LFmax, LFmin, LSmax, LSmin, LImax, LImin, SEL,Ts, Tm, Volt, E.
Accuracy±0.7 dB
Weight0.35 kg (include batteries)
ApplicationNoise integrating measurement
Power Supplybattery 4×AA or external power supply
EnvironmentWorking Temperature: -10 ~ 50°C Storing Temperature: -20 ~ 70°C
Statistical Analysis FunctionMeasure Index: Lxyp, Lxeq,0.5s, Lxeq,T, Lxymax, Lxymin, LxyeqT , SEL, Ln as minimum: 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
24h measures index: Ld, Ln, Ldn.
Audio RecordingRecord sound data and save it into “WAVE” format
SD cardIncluded
Integrating 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 velocity, distance, direction and time calibration (Optional Upgrade)
1/1 OCTOptional Upgrade
Dosimeter FunctionLAsp,LASMAX,LASMIN,TWA,LEX 8h, LCpeak, LZpeak, LAeq,T, LAVG, DOSE
(Optional Upgrade)
FFT Analysis
Sampling Freq: 48 kHz, 24 kHz, 12 kHz, 6 kHz, 3 kHz
Measuring Parameters: MAX, MIN, LeqT
(Optional Upgrade)
PrinterThermal or dot-matrix bluetooth printer (optional)

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