Sound Level Meter As-156a And As-156b

We are engaged in manufacturing, exporting and supplying excellent quality Sound Level Meter AS-156A And AS-156B to our valuable clients.
Product Features:-
* DC output :1 0 m V / d B.
* Auto range selection and digital display with no guessing errors.
* Can memorize 30 groups of measurement results and measuring conditions.
* Permits choice a Aa , a Ca , a Fa weighting and a Fasta / a Slowa response times.
* Offers 4 measurement parameters: Lp (sound level); Leq (Equivalent Continuous A Sound Level ); Lmax ( Maximum Sound
Level) and LN (Percent of all readings over alarm value set ).
* Use USB data output with connection PC.
* Provide Bluetooth data outputchoice.

Product Parameters
Resolution : 0.1dB
Accuracy : AS-156A: A 2dB
AS-156B: A 1dB
Measurable Parameters : Lp (sound level)A
Leq (Equivalent Continuous A Sound Level)
Lmax (Maximum Sound Level)
LN (Percent of all readings over alarm value set)
Measuring Range : Lp: 30~130dB
Leq: 35~130dBA
LN: 0~100%
Frequency Weighting : a Aa / a Ca / a Fa (Flat)
Time Weighting : a Fasta ( 125ms ) / a Slowa ( 1 second )
Microphone : 1/2 inch electret condenser type
Memory : Store 30 group measurement conditions and data
Built In Calibration Signal : 94dB at 1kHz (sinusoidal)
Alarm Value Set : 30~130 dB
Frequency Range : AS-156A:: 20~8,000Hz
AS-156B: 20~12,500 Hz
Alarm Output : LED and optional relay contact (NC)
Size : 140x70x30 mm
Power Supply : 4x1.5vAAA Um-4 Battery
Weight : 130 g (Not including batteries)A