High precision air noise sensor is a digital and modular multifunctional sound level meter. It adopts the single chip microcomputer and digital detection technology with DSP (digital signal processing) function, which has the advantages of high reliability, good stability, wide dynamic range and no range conversion. Can be widely used in a variety of machines, vehicles, ships, electrical appliances and other industrial noise measurement, can also be used for environmental noise, labor protection, industrial hygiene measurement.
main parameter
a) accuracy
± 1.5dB, calibrated at an ambient temperature of 23 ± 5℃, with an input signal of 94dB (1 kHz).
B) Frequency counting right
A weighted And c) time counting rights
F（125ms）
d) frequency range 20 Hz ~ 12.5 kHz
E) Working environment conditions
Air temperature: -10℃ ~ + 50℃
Relative humidity: 20% ~ 90%
Static pressure: 65 kPa ~ 108 kPa
F) Measurement range at the 1 kHz frequency
30 dB(A) ~ 130 dB(A)
g) resolution ratio
0.1 dB
h) microphone
A 0.5-inch capacitive microphone
I) Effect of using the wind hood
Not greater than 0.5 dB in the important frequency range
j) power supply mode
DC12V
K) Output mode
RS485（ ModBus）
l) power dissipation
About 230 mW
M) Product material
Metal rod type is made of aluminum alloy
n) weight
About 160 g (including protective and wind cover, excluding cable, 2m)
