Scarlet ST-11D Class 1 Sound Level Meter

Designed for Environmental & Occupational Noise Measurements

Class1ComplieswithIEC61672:2013,DataLogging,SoundRecording,widemeasuringrange27-140dB,10 Hz-20kHzfrequencyrange,27dB-140dBmeasurementrange,MeasuresanddisplaysLeqvalue,SLM
High Precision

IEC 61672-1:2013 Class 1 Standard
±0.7 dB High Accuracy

Class1ComplieswithIEC61672:2013,DataLogging,SoundRecording,widemeasuringrange27-140dB,10 Hz-20kHzfrequencyrange,27dB-140dBmeasurementrange,MeasuresanddisplaysLeqvalue,SLM
Smart Integration

Measures and Displays Leq Value
Adjustable A/C/Z Frequency Weightings

Class1ComplieswithIEC61672:2013,DataLogging,SoundRecording,widemeasuringrange27-140dB,10 Hz-20kHzfrequencyrange,27dB-140dBmeasurementrange,MeasuresanddisplaysLeqvalue,SLM
Wide Measurement

27-140 dB Measurement Range
Competent for Rigorous Industrial Use

Integrating Algorithms for Occupational Noise

Class1ComplieswithIEC61672:2013,DataLogging,SoundRecording,widemeasuringrange27-140dB,10 Hz-20kHzfrequencyrange,27dB-140dBmeasurementrange,MeasuresanddisplaysLeqvalue,SLM

ST-11D Sound Level Meters fully comply with the latest Class 1 IEC 61672:2013 standard. Built-in smart integrating algorithms and wide measuring range 27-140dB competent in most rigorous industrial use. 

Measures and displays Leq value. Shows Equivalent Continuous Sound Level and Sound Exposure upon the chosen time period, ideal for occupational noise measurements such as the Controls of Noise at Work Regulations or the OSHA Occupational Noise standards. Safeguard and ensure employees’ hearing and occupational safety at the front line.

Data Logging & Precision Recording

ST-11D is your ideal sound level meter for real-time noise measuring as well as long-term noise exposure documenting over time. Condenser microphone for high accuracy & long-term stability. Built-in memory for sound recording and measurement results (including Start/Stop Time, %Dose, TWA). Low power combustion and USB port charging allow long-hour usage. 

Features

Class1ComplieswithIEC61672:2013,DataLogging,SoundRecording,widemeasuringrange27-140dB,10 Hz-20kHzfrequencyrange,27dB-140dBmeasurementrange,MeasuresanddisplaysLeqvalue,SLM

• IEC 61672-1:2013 Class 1 Standard
• 27-140 dB measurement range
• ±0.7 dB high accuracy
• 0.1 dB resolution
• 10-20k Hz frequency range
• A, C, Z frequency weightings
• Fast, Slow, Impulse, Peak time weightings
• RS232 Data Output / USB computer interface
• Data Logging & Record functions
• Measurement Report Printing
• Optional: Portable High Speed Printer Kit
• Optional: Class 1 Sound Level Calibrator (94/114 dB)

More Info

Scarlet ST-11D Class 1 Sound Level Meter

Designed for Environmental & Occupational Noise Measurements

Class1ComplieswithIEC61672:2013,DataLogging,SoundRecording,widemeasuringrange27-140dB,10 Hz-20kHzfrequencyrange,27dB-140dBmeasurementrange,MeasuresanddisplaysLeqvalue,SLM
High Precision

IEC 61672-1:2013 Class 1 Standard
±0.7 dB High Accuracy

Class1ComplieswithIEC61672:2013,DataLogging,SoundRecording,widemeasuringrange27-140dB,10 Hz-20kHzfrequencyrange,27dB-140dBmeasurementrange,MeasuresanddisplaysLeqvalue,SLM
Smart Integration

Measures and Displays Leq Value
Adjustable A/C/Z Frequency Weightings

Class1ComplieswithIEC61672:2013,DataLogging,SoundRecording,widemeasuringrange27-140dB,10 Hz-20kHzfrequencyrange,27dB-140dBmeasurementrange,MeasuresanddisplaysLeqvalue,SLM
Wide Measurement

27-140 dB Measurement Range
Competent for Rigorous Industrial Use

Class1ComplieswithIEC61672:2013,DataLogging,SoundRecording,widemeasuringrange27-140dB,10 Hz-20kHzfrequencyrange,27dB-140dBmeasurementrange,MeasuresanddisplaysLeqvalue,SLM

Integrating Algorithms for Occupational Noise

ST-11D Sound Level Meters fully comply with the latest Class 1 IEC 61672:2013 standard. Built-in smart integrating algorithms and wide measuring range 27-140dB competent in most rigorous industrial use. 

Measures and displays Leq value. Shows Equivalent Continuous Sound Level and Sound Exposure upon the chosen time period, ideal for occupational noise measurements such as the Controls of Noise at Work Regulations or the OSHA Occupational Noise standards. Safeguard and ensure employees’ hearing and occupational safety at the front line.

Data Logging & Precision Recording

ST-11D is your ideal sound level meter for real-time noise measuring as well as long-term noise exposure documenting over time. Condenser microphone for high accuracy & long-term stability. Built-in memory for sound recording and measurement results (including Start/Stop Time, %Dose, TWA). Low power combustion and USB port charging allow long-hour usage. 

Class1ComplieswithIEC61672:2013,DataLogging,SoundRecording,widemeasuringrange27-140dB,10 Hz-20kHzfrequencyrange,27dB-140dBmeasurementrange,MeasuresanddisplaysLeqvalue,SLM

Features

• IEC 61672-1:2013 Class 1 Standard
• 27-140 dB measurement range
• ±0.7 dB high accuracy
• 0.1 dB resolution
• 10-20k Hz frequency range
• A, C, Z frequency weightings
• Fast, Slow, Impulse, Peak time weightings
• RS232 Data Output / USB computer interface
• Data Logging & Record functions
• Measurement Report Printing
• Optional: Portable High Speed Printer Kit
• Optional: Class 1 Sound Level Calibrator (94/114 dB)

More Info

Where does Scarlet Class 1 Sound Level Meter Apply

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

Specification

ModelST-11ST-11D
Fulfils StandardIEC 61672:2013 Class 1IEC 61672:2013 Class 1
Dimensions310×72×32 mm310×72×32 mm
Normal frequency10 Hz~20 kHz10 Hz~20 kHz
Measurement range27 ~140 dB27 ~140 dB
Main Parameters of MeasurementLFp, LSp, LIp, Leq1, Lpeak, Leq,T, LFmax, LFmin, LSmax, LSmin, LImax, LImin, SEL,Ts, Tm, Volt, E.LFp, LSp, LIp, Leq,t, Lpeak, Leq,T, LFmax, LFmin, LSmax, LSmin, LImax, LImin, SEL, Lex8h, LAVG, TWA, DOSE, Ln1, Ln2, Ln3, Ln4, Ln5, SD,Ts, Tm, Volt, E.
Display128×64 OLED128×64 OLED
Weight0.4kg0.4kg
ApplicationNoise integrating measurementSound level meter/ Noise Dosimeter/Data logging & Precision recording(Opt)
Power Supplybattery 4×AAAbattery 4×AAA or external power supply
ContentsMeter, microphone, windscreen, calibration certificate, carrying case, English manual

A Class 1 Sound Level Meter is a noise measurement instrument that meets the requirements of IEC 61672-1:2002 (or an equivalent such as BS EN 61672-1:2003) to Class 1 performance.
This standard specifies two levels of performance, Class 1 and Class 2, with Class 1 being effectively more accurate. Within the standard are a set of performance criteria that an instrument must meet and each of these has a tolerance associated with it. The tolerances for Class 1 are tighter than for Class 2. For example, at the reference frequency of 1kHz, the tolerance limits for Class 1 are +/- 1.9dB and for Class 2 the tolerance is +/- 2.2dB.
A simple sound level meter that meets the standard may only provide Sound Pressure measurements whereas a much more sophisticated instrument may provide for the measurement of Sound Pressure, Leq and Peak Sound Pressure.For example, the Noise at Work Regulations which are used in the UK requires, as a minimum, the measurement of LAeq and LCPeak.

Whether you need a Class 1 or a Class 2 sound level meter will depend largely upon the application that you will be using the instrument for.
If you are working to an environmental noise standard then this may specify that the instrument should be Class 1. For example, ISO 20906:2009 “Unattended monitoring of aircraft sound in the vicinity of airports” states that “..shall conform to the electroacoustical performance specifications of IEC 61672-1 for a class 1 sound level meter.”
The Class 1 sound level meter tend to measure lower levels due the sensitivity of the microphone capsule. This is particularly relevant for environmental noise surveys where low noise levels are being measured. Finally, you may choose Type 1 for important legal applications as the evidence from the more accurate meter may be more convincing, even when the regulations do not demand it. Class 1 sound level meter is preferred for the design of cost-effective noise controls.

Related products 

ST-15D Class 1 GPS Sound Analyzer
The most high-grade selection of real-time 1 / 3 octave band analysis

More Info

Our Clients

Class 1 Sound Meter - ST11D
Thank you for the interest in ST-11D. Please fill out the form below. We will get back to you in few hours.