1、Accurate and Reliable: This noise sensor is a digital, modular multifunctional sound level meter with a measurement range of 30-130dB(A), with -38±3dB (or 12.6mv/Pa) sensitivity, providing reliable noise measurement 2、Product Advantages: The noise transducer adopts digital signal processing chip and digital detection technology, which has the advantages of high reliability and stability, wide dynamic range, and no need for range conversion 3、Omnidirectional Microphone: This noise sensor uses 0.5 inch electret microphone with omnidirectional design to catch sound from all directions, ensuring comprehensive noise measurement, ideal for various complex environments 4、Wide Application: This noise level transducer is widely applicable for measuring various industrial noise including machines, vehicles, ships, electrical appliances, and also for measuring environmental noise and labor protecting 5、Aluminum Alloy Case: This sound level sensor is made of excellent aluminum alloy, with high strength, oxidation resisting, light weight, and has no deformation, with IP55 protective level, making it suitable for various harsh environments Item Type: Noise Sensor Length: Approx. 292mm / 11.5in Power Supply: DC 5V Measurement Range: 30-130dB (A) Sensitivity: -38±3dB (or 12.6mv/Pa) Resolution: 0.1dB Accuracy: ±3dB, calibrated at 23±5℃ ambient temperature, frequency weighting conforms to IEC 61672 type 2 standard, calibrated at input signal of 94dB (1kHz) Frequency Range: 20Hz to 12.5kHz Response Time: 200ms, time response simulates human ear response Calibrator: For 4231 multifunctional sound calibrator Microphone: Electret Microphone Directivity: Omnidirectional Microphone Size: 0.5 inch Load Capacity: Impedance ≤350Ω for current output when powered by DC12V, ≤900Ω for current output when powered by DC24V, impedance ≥1KΩ for voltage output Maximum Power Consumption: 500mW Material: Aluminum Alloy Working Environment: Temperature -40℃-80℃, Humidity: ≤100%RH non condensing Protecting Level: IP55 Troubleshooting: The meter displays incorrect values at output. The correct data cannot be obtained because the cable connection is faulty or the comm serial port is faulty. Check whether the cable connection is correct and secure, whether the serial port is occupied, and whether the serial port Settings are correct. Red Wire: Power Positive Pole Black Wire: Power Negative Pole Yellow Wire: Signal Weight: Approx. 418g / 14.7oz 1 x Noise Sensor 1 x Cable 1 x User Manual