30 - 130 dB USB Digital Decibel Sound Level Meter

This Multi-functional Digital Sound/Noise Level Meter w/ USB Interface is designed to meet the measurement requirement of noise engineers, noise quality control and health prevention in various environments. Such as noise measurement in factory, office, traffic road, family and all other noise measurement applications.
You can record the sound and send the synchronized data/time easily through USB to your computer. Furthermore, with the helpful software included in the item, you can find out the result of the research in minutes from the conspicuous information form. Multi Value added tripod fixed screw aperture for support setting can facilitate long time recording.
Features:
Designed according to following standards:a. International Electrician Committee Standard: IEC PUB 651 TYPE 2
b. US National Standard: ANSI S1.4 TYPE 2
Accuracy: up to +/- 1.5dB
Windscreen for Filter-out Unwanted Signals
Wild Measurement Range: 30-130dB. 5 Measurement Levels for More Precise Result
Fast (High Speed) Rate to Pick Up the Current Reading
Slow (Low Speed) Rate to Pick Up the Reading of Average within 1 Second
A-Weighting for General Sound Level Measurements
C-Weighting for Checking the Low-frequency Content of Sounds
Maximum Value Holding Function to Lock up the Maximum Reading
Auto Power Off Design for Energy Saving
Calendar Function to Record the Reading Date and Time
High 4700 Data Record Capability for Long Time Recording
USB Interface Is Configured to Connect to The Computer for Statistic, Printing And Analyzing by The USB Cable And The Software
Functions of Data Record Downloading, Real Time Data Sampling Analysis, and Printing Graph & Data etc.
Both AC and DC Analogy Signal Output are Available connecting to Frequency Analyzer or X-Y Axis Recorder for Data Statistical Analysis
Requries 4x 1.5V AA Battery (Not included)

Specifications:

Calibration Sound Source

94dB@1KHz

Measurement Range
30-130dBA/ 35-130dBC

Accuracy
+/-1.5dB(reference sound pressure standard,94dB@1KHz)

Frequency Response
31.5Hz-8.5KHz

Resolution
0.1dB

Measuring Level
30-80, 50-100, 60-110, 80-130, 30-130

Dynamic Range
50dB/ 100dB

Overload Indication
OVER/ UNDER

Frequency Weighting Characteristic
A and C

Digital Display
4 digits

Analogy Bar Graph
1dB/1 bar graph

Sampling Rate
20 times/second

AC Signal Output
4Vrms/ full bar graph, output impedance is about 600 ohm

PWM Signal Output
Duty cycle=0.01 x db value/3.3 x 100%

Dynamic Characteristic
FAST (high speed)/SLOW (low speed)

Calendar Accuracy
+/-30seconds/day

Data Storage Quantity
4700

The Maximum Value Holding
MAX

Auto Power Off
Yes (after no operation for 10 minutes)

Microphone
1/2" polarization capacitance microphone

Operating Voltage
6V

External Dimensions
67 x 30 x 183 (mm)

Net Weight
147.5g (not includes battery)

Battery Life
20Hours (continuous use)

Package Includes:
1x Sound Level Meter
1x Sponge Ball
1x Computer Software Disc
1x USB Connection Cable
1x AC output wire
1x Operation Manual
1x Black Carrying Case
4x 1.5V AA Battery Not Included