Sound Level Meter
MODEL 407740 - Digital Sound Level Meter
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The Extech 407740, Digital Sound Level Meter allows reading of both A and C frequency weightings to meet IEC 651 Type 2 standards. The wide 30-130dB measurement span is divided into three ranges 30-80, 50-100, 80-130dB to ensure a high accuracy to 1.6. Includes 50dB on each step with over/under range indication. Large 0.7, 3-1/2 digit LCD displays resolution from 0.1dB. Max Hold function stores highest reading. Select either fast 200ms or slow 500ms response time. Utilizes a 0.52 condenser microphone. AC and DC 10mV/dB outputs are standard through a phone output terminal for connection to an analyzer or recorder. Includes instructions, 9V battery, carrying case, and 1-year warranty.
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High accuracy to 1.5 dB |
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Read both A and C frequency weightings |
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Meets IEC 651 Type 2 standards |
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3 measuring ranges for greater accuracy |
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Low range 30 to 80dB |
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Medium 50 to 100dB |
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High 80 to 130dB |
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Large 0.7 3-1/2 digit LCD, 0.1dB resolution |
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Max Hold function stores highest reading |
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Fast 200ms or slow 500ms response time |
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Utilizes 0.52 13.2mm condenser microphone |
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AC and DC 10mV/dB outputs standard |
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Complete with 9V battery and carrying case |
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Display0.7'' (18mm) LCD, 3 1/2 Digits (2000 counts) Accuracy (at 23 Degrees +/- 5 Degrees C)1.6% at 94 dB (1 kHz + 1.5 dB after calibration) Meets IEC-651 type 2 Input Signal Range''A'' Weighting: 30 to 130 dB (500 to 10 kHz) ''C'' Weighting: 30 to 130 dB (30 to 10kHz) Response TimeFast: Response = 200 ms Slow: Response = 500 ms Resolution0.1 dB Standard ComplianceANSI and IEC Type 2 Frequency Measurements31.5 to 8,000 Hz MicrophoneElectric Condenser Microphone, 0.5'' (12.7 mm) Range Selector Switch30 to 80 dB, 50 to 100 dB, and 80 to 130 dB (the display provides OVER and UNDER range indication) External CalibratorUse EXTECH Model407744 Output SignalAC: 0.5 Vrms (full scale of selected range) DC: 0.3 to 1.3 Vdc, 10 mV/dB Analog Output Terminal3.5 mm Phone Jack Power Supply9 V Battery |
Operating Temperature32 to 122 Degrees F (0 to 50 Degrees C) Operating Humidity Max. 90% RH (0 to 35 Degrees C) ConstructionABS Resin DimensionsSize: 10'' x 2.8'' x 1.1'' (255 x 70 x 28 mm) Weight:10 oz (280 g) Ordering InformationVEX407740: EXTECH Digital Sound Level Meter VEX407740-NSIT: EXTECH Digital Sound LevelMeter with NIST Traceable Certificate of Calibration VEX407744: Precision Calibrator, 94 dB forVEX407740 VEX407744-NSIT: Precision Calibrator, 94 dB forVEX407740 with NIST Tracable Certificate of Calibraton
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