ST-11/11D Class 1 Sound Level Meter

Class1ComplieswithIEC61672:2013,DataLogging,SoundRecording,widemeasuringrange27-140dB,10 Hz-20kHzfrequencyrange,27dB-140dBmeasurementrange,MeasuresanddisplaysLeqvalue
ST-11/11D complies with the latest standard IEC 61672:2013. Safeguard and ensure employees hearing and occupational safety at the front line. Data Logging and Sound Recording enables further analyzing long period data. Storage supported by built-in memory or connection with hard-drive. Low power combustion and USB port charging allow long hour usage. Measures and displays Leq value. Shows Equivalent Continuous Sound Level and Sound Exposure upon chosen time period.

Excellent Performance 

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

Built in smart integrating algorithms and wide measuring range 27-140dB competent in most rigorous industrial use. Through friendly user interface and various output options, ST-11/11D can be controlled by telemetry and enables external system integration. Additional data logging and sound recording function in ST-11D help record long term data.

Lightweight, portable but perfectly formed. Scarlet ST-11/11D out stands the market with excellent performance.

Features

Class1ComplieswithIEC61672:2013,DataLogging,SoundRecording,widemeasuringrange27-140dB,10 Hz-20kHzfrequencyrange,27dB-140dBmeasurementrange,MeasuresanddisplaysLeqvalue
• Class 1 Complies with IEC-61672-2013
• 10 Hz-20k Hz frequency range
• 27 dB-140 dB measurement range
• Data logging & record function(St-11D)
• Measures and displays Leq value
• Long term measurement
Class1ComplieswithIEC61672:2013,DataLogging,SoundRecording,widemeasuringrange27-140dB,10 Hz-20kHzfrequencyrange,27dB-140dBmeasurementrange,MeasuresanddisplaysLeqvalue

ST-11/11D Class 1 Sound Level Meter

ST-11/11D complies with the latest standard IEC 61672:2013. Safeguard and ensure employees hearing and occupational safety at the front line. Data Logging and Sound Recording enables further analyzing long period data. Storage supported by built-in memory or connection with hard-drive. Low power combustion and USB port charging allow long hour usage. Measures and displays Leq value. Shows Equivalent Continuous Sound Level and Sound Exposure upon chosen time period.

Excellent Performance

Built in smart integrating algorithms and wide measuring range 27-140dB competent in most rigorous industrial use. Through friendly user interface and various output options, ST-11/11D can be controlled by telemetry and enables external system integration. Additional data logging and sound recording function in ST-11D help record long term data.

Lightweight, portable but perfectly formed. Scarlet ST-11/11D out stands the market with excellent performance.

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

Features

• Class 1 Complies with IEC-61672-2013
• 10 Hz-20k Hz frequency range
• 27 dB-140 dB measurement range
• Data logging & record function(St-11D)
• Measures and displays Leq value
• Long term measurement

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 Class 1IEC 61672 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×LR 6battery 4×LR 6 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.

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Class 1 Sound Meter - ST11/11D

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