Operating voltage

10~28V

Power consumption

27.8 mA @ 24 v

Transmitter circuit operating temperature

 -20℃~+60℃, 0%RH~80%RH

Output signal

 RS485 modbus-rtu communication protocol

UART or rs-485 communication parameters

9600 N 8 1

 Measurement range

50dB~120dB

 Frequency weighting

A weighting

Frequency response range

20Hz~ 12.5khz

Response time

fast mode: 500ms

Slow mode

1.5S

Stability

 less than 2% in service life

Reference calibration points

94dB and 114dB calibration, reference sound pressure 20uPa, frequency 1kHZ

Noise accuracy

± 0.5db (in reference pitch, 94db@1khz)

Dust cover influence

 influence ≤0.5dB in the range of 50~115db

Influence within other ranges within the range

≤ 0.7db

Working environment: air temperature

-40~+60℃

Relative humidity:

25%~90%

The static pressure

 65 kpa to 106 kpa