Mastfuyi Decibel Meter, Sound Level Meter 30-130 dB

Product details

• 【Compact and Lightweight】Composite material injection molding process and ergonomic design, non-slip and wear-resistant, comfortable to hold; Slim and lightweight, doesn't take up space, easy to carry and store; Pocket clip design allows it to be securely clipped to the pocket and not easily dropped and lost.
• 【Calibration】Before calibrating the instrument you need to prepare a standard sound source device to be used for calibration, please do not calibrate without a standard sound source device. The A-weighted calibration steps are as follows: Step 1: Press SLOW/FAST button, Flashlight/HOLD button and power switch button at the same time and then release the buttons to enter the calibration mode. Step 2: Set the standard source device to 94dB, then align the meter to the standard source device, wait for the meter reading to stabilize at 94dB, press the SLOW/FAST button to save, and then press the power switch button to restart the device that the calibration is complete..
• The C-weighted calibration steps are as follows: Step 1: Press SLOW/FAST button, Flashlight/HOLD button and power switch button at the same time and then release the buttons to enter the calibration mode. Step 2: Press the A/C button to switch to C-weighted. Step 3: Set the standard source device to 94dB, then align the meter to the standard source device, wait for the meter reading to stabilize at 94dB, press the SLOW/FAST button to save, and then press the power switch button to restart the device that the calibration is complete..
• 【Versatile Uses】Features a full color LCD screen with a resolution of 0.1 dB, clear and beautiful; MAX hold function to lock the maximum value; Auto power off after 15 minutes inactivity to prolong battery lifespan; Data Hold function to freeze the current readout, easy to read and record data; Flashlight for use at night.
• 【Fast/Slow Measurement】The Fast-Weighting mode uses a constant of 0.125s/time, which is suitable for measuring the sound level in real time in general environment; The Slow-Weighting mode uses a 1s/time constant, which is suitable for environmental measurements with relatively large changes in noise levels.
• 【A/C Weighted Measurement】When measuring the sound level felt by human beings, select A-Weighting mode which simulates the frequency of low-intensity human ear noise; when measuring the actual sound level like noise analysis of machine motors and machines, select C-Weighting mode which simulates the frequency of high-intensity noises of the human ear. Professional measurement methods provide users with a perfect experience.
• 【High Accuracy】Mastfuyi decibel meter uses a precise condenser microphone to capture sound, measures sound level 30-130 dBA, 35-130dBC. Highly accurate with ±1.5 dB, Frequency from 30Hz to 8,000KHz, Perfect for monitoring noise levels in community, home, audio system, automobile, school, office, factory.
• 【NOTE】The flashlight can only be used properly when the noise is higher than 50 dB; Turning the flashlight on and off may affect the data hold function.
• 【Dual Visual Alerts】Level 1 (<50dB): 🟩 analog bar is displayed, no indicator lights up, the acoustic environment is safe; Level 2 (50-90dB): 🟩🟨 analog bar is displayed and the 🟢 indicator lights up, better to wear ear muffs or noise-canceling headphones to protect your hearing; Level 3 (>90dB): 🟩🟨🟥 analog bars is displayed, 🔴 indicator lights up, need to leave the sound source as soon as possible.