Noise Sensor
SMKB-NO-PRO Noise sensor is a digital, modular and multifunctional sound level meter . The digital signal processing chip and digital detection technology are adopted, which have the advantages of high reliability , good stability , wide dynamic range, and no needof range conversion. It canbe widelyused in industrial noise measurement of various machines, vehicles, ships, electrical appliances, etc . , and can also be used in environmental noise, labor protection, industrial hygiene measurement.
Wiring Method
- If the sensor is equipped with our instrument, directly use the sensor cable to connect the sensor with the corresponding interface on the instrument.
- If the sensor is purchased separately , the order of the wires as followed:
Signal Output
| Cable Colour |
Voltage , Current |
RS 485 |
RS 232 |
| Red |
VCC |
VCC |
VCC |
| Black |
GND |
A+/TX |
Connection equipment RX Computer serial port 2 |
| Yellow |
Signal Output |
B-RX |
Connection equipment TX Computer serial port 3 |
| Green |
|
GND |
GND |
Technical Parameters
| Measuring Range |
30~130dB (A) |
| Sensitivity |
-38±3dB (Or 12.6mv/Pa) |
| Resolution |
30.1dB |
| Accuracy |
3±3dB@23±5 C. Accordance with IEC 61672 type 2
standard, calibrated with input 94dB(1kHz) |
| Frequency Range |
20Hz -12.5kHz |
| Response Time |
200ms |
| Calibration Device |
B&K (Bruel &kjaer), 4231 |
| Microphone |
Electric microphone Directivity : Omnibearing |
| Microphone Size |
0.5 inch |
| Power Supply |
DC5V DC9V-30V |
| Options For Output Signal |
RS485 (Modbus -RTU) RS232 (ASCII)
4-20mA
0-20mA
0-5V |
