WT1357 Portable Digital Sound Level Meter with 30~130dB Range, ±1.5dB Accuracy and A & C Frequency Weighting for Industrial Noise Measurement

The appearance design of digital sound level meter is novel, small and portable. The sound level meter is applicable for measurement of noise engineering, quality control, health prevention and various environmental noise, including noise measurement in such various places as factories, offices, transporting routes, families, stereo equipment and other places.

This equipment has been designed to meet the measurement requirement of Safety Engineers, Health, Industrial Safety offices and Sound Quality control in various environment, which include factory, office, traffic, family, and audio system.

This equipment has the following functions:

1. It is designed according to the IEC651 TYPE2 & ANSI S1.4 TYPE2
2. Accuracy up to ± 1.5 dB
3. Measurement range: 30~130 dB
4. With two equivalent weighted sound pressure levels, A and C.
5. Fast & Slow dynamic characteristic modes.
6. AC and DC output for frequency analyzer level recorder, FFT analyzer, graphic recorder etc.

Model	WT1357
Calibration sound source	94dB@1KHz
Measurement range	30~130 dB(A), 35~130dBC
Level range	30~80,50~100,60~110,80~130, 30~130dB
Linearity range	50dB / 100dB
Accuracy	±1.5dB (Reference sound pressure standard,94dB@1KHz)
Resolution	0.1dB
Frequency weighting	A/C
Digital Display	4digits
Sample rate	2 times/second
Bar graph	50 dB scale at 1 dB step for monitoring current sound pressure level display Sample rate: 20times/second
Over indication	OVER / UNDER
Frequency response	31.5Hz~8.5KHz
AC output	0.707Vrms at FS output impedance approx. 600 ohm
DC output	10mV/dB, output impendence approx. 100ohm
Time weight	FAST / SLOW
Microphone	1/2-inch electret condenser microphone
Max	yes
Power life	About 30 hours (alkaline battery)
Self-calibration time	3s
Operating temperature	0~40℃
Operating humidity	10~85%RH
Storage temperature and humidity	-10~40℃,0-70%RH
Power supply	4*1.5V AAA batteries or DC 6V 100mA (maximum DC9V)
Dimension	256*70*35mm
Weight	308g (including battery)

The contents included in the shipment:
1. Digital Sound Level Meter:1pc
2. English Instruction Manual:1pc.
3. 4*1.5V AAA batteries (not for air shipping)
4. Sponge ball:1pc
5. Audio line:1pc
6. Paper color box: 1pc.
7. Paper box:1pc