30-130dBA Portable Digital Sound Noise Audio Level Meter Measuring Decibel Pressure Logger Tester Monitor

Model: SL821Accuracy: ± 1.5 dB (in the reference sound pressure standard: 94dB @ 1 kHz)Frequency response: 31.5 Hz to 8 kHzDynamic range: 50dBMeasuring range: 30~130 dBA; 35~130 dBCFrequency weighting characteristics: A and C characteristicsDynamic characteristics: FAST (fast), SLOW (slow) reaction rateMicrophone: 1/2 inch polarized condenser microphoneMaximum value lock: MAXDigital display: 4 digits, resolution 0.1 dB, sampling rate 1sAnalog stick display: 1 grid represents 1dB, sampling rate is 125msMeasurement gear: 30 to 80dB, 50 to 100dB, 60 to 110dB, 80 to 130dBMeasurement functions: sound level (Lp), equivalent continuous sound level (LAeq), exposure sound level (LAE), and C-weighted noise peak (LCpeak)Storage function (processing results are stored manually): 10 groups (storage points can be recalled and displayed)Overload indication: "OVER" and "UNDER" symbols indicate signal output: 0~2.5V, 25mV/dB, output impedance is about 600ΩPower supply: 9.0V, 1 6F22 battery; or DC9.0V, 100mA voltage converterBattery life: about 8 hours (alkaline battery, without backlight)Operating temperature and humidity: 0~ +40℃; 10 ~80%RHStorage temperature and humidity: -10~ +60℃; 10~ 70%RHDimensions: 240 (length) x 110 (width) x 60 (height) mmIt can measure sound level (LP), equivalent continuous sound level (Lep), maximum sound level (Lmax), exposure sound pressure level (LE) and noise peak value (Lcpeak).A-weighted and C-weighted two frequency characteristics.10 sets of data storage.Package: 1*Sound Level Meter (without battery)Note:1. Please Allow 1-3cm Differs Due To Manual Measurement.2. Light shooting and different displays may cause the color of the item in the picture a little different from the real thing.Please refer to the received product. Thank you for your understanding.

• Digital, analog bar LCD backlight display, full unit symbols, perpetual calendar date and time display.
• Maximum and minimum measurement, data retention.
• Warning display: Over (overload) Under (too small, less than -1db).
• When the battery is under-voltage, the power supply will automatically shut down.
• It can be connected to an external power supply (9V, 100mA).