SMART SENSOR AS844+ Digital Sound Level Meter Digital Noisemeter LCD Sound Level Meter 30-130dB Noise Volume Measuring Instrument Decibel Monitoring Tester with Data Record & USB Connect Computer Func

Want to test the sound level? Need to know the noise level? Try our digital sound level meter. It's featured with wide measuring range (30-130dB). It's portable and easy to use as a handy instrument for sound quality control in factory, office, home, school and construction site.

Features:
Data storage function allows to store up to 15,000 groups of data.
Connect with the computer through USB cable, which supports data record download, real-time sampling analysis, and graph & data printing.
Real time display the current temperature(℃/℉ switchable) and humidity.
2.7" large LCD display for easy reading, convenient to use.
Wide measurement range from 30dB to 130dB, Frequency: 31.5Hz - 8KHz, Resolution: 0.1dB, Accuracy: ±1.5dB.
With A and C equivalent weighted sound pressure levels.
Fast and slow dynamic characteristic mode.
Both AC and PWM signal output are available.
Low battery indication, automatic & manual power off function.
Equipped with sponge ball and a sturdy storage case. Compact and light, convenient to hold and carry.
Portable and easy to use, suitable for checking, monitoring or controlling the sound level for personal, families, business, studies, industrial, etc.

Specifications:
Material: ABS
Calibration Sound Source: 94dB@1KHz
Measure 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: A weighting and C weighting
Digital Display: 31/2 digits
Analogy Bar Graph: 1dB/1 bar graph
Sampling Rate: 20 times per second
AC Signal Output: 1Vrms/full bar graph, output impedance is about 600 ohm
Dynamic Characteristics: Fast/Slow
Data Storage: 15,000 groups
Auto OFF: 10 minutes
Microphone: 1/2 inch ECM type microphone
Working Voltage: 3.7V lithium battery or USB 5V
Battery Standby Time: 12 hours of continuous using
Temperature Measuring Range: 0~45℃, ±2℃ accuracy
Humidity Measuring Range: 10%～99%RH, ±5% accuracy
Power Supply: 1 * 3.7V 1000mAh li-ion battery
LCD Size: 52 * 43mm / 2.05 * 2.01in
Storage Case Size: 238 * 205 * 55mm / 9.37 * 8.07 * 2.16in
Item Size: 223 * 65 * 32mm / 8.78 * 2.56 * 1.26in
Item Weight: 227g / 8.03oz
Package Weight: 740g / 26.11oz
Package Size: 25.5 * 21 * 5.8cm / 10.04 * 8.27 * 2.28in

Package List:
1 * Sound Level Meter
1 * Storage Case
1 * USB Cable
1 * Battery
1 * CD
1 * User Manual(English)

Note:
When measuring the noise in outdoors, please put a sponge ball on the microphone head to prevent the microphone from being blown directly to cause airflow noise.