Features120Hz-12.5kHz pickup frequency, high accrency noise sensor has wide pickup frequency and stable signal. 2Industrial digital detection technology adopts digital signal processing chip with good linearity and wide dynamic range. 3It is waterproof and dustproof for long term durability. It adopts a high sensitivity condenser microphone and has a wide measurement range. 4Support ?20 DegreeC?+60 DegreeC, 0%RH?80%RH working temperature, the measurement range is 30dB?120dB. 5Wide voltage power input 10-30V can be 485 signal wiring, pay attention to the two wires can not be reversed.SpecificationItem Type: Noise SensorOutput Standard: RS485 Signal Output/Standard RTU ProtocolPower Supply: 10-30V DC (P0.1W)Measuring Range: 30dB-120dBPower: 0.1WFrequency Range: 20Hz-12.5kHzWorking Temperature: -20 DegreeC-+60 DegreeC, 0%RH-80%RHResolution: 0.1dB Response Time: 3sOutput Signal: 485/4-20mA/0-5V/0-10VTypical Characteristics: The Equipment Shell Is Made Of 304 Stainless Steel, And It Is Installed By FlangeProduct Size: Height: Approx. 264mm / 10.4inInstallation Diameter: 36mmParameter Setting: Use The Provided Configuration Software To Configure Through The 485 InterfaceBrown: Positive Power Supply Yellow: 485ABlack: Power Negative Blue: 485APackage List1 x Noise Transmitter 3 x Screw 3 x Nut 1 x Manual