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Extech 407750: Sound Level Meter with PC Interface

Extech 407750: Sound Level Meter with PC Interface

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The 407750 Sound Level Meter with PC Interface has a large backlit display, PC Interface and background sound absorber for noise measurements with high ambient noise levels. It features A/C Weighting, fast/slow response time, Min/Max, and analog AC/DC outputs for connection to a recorder. Complete with microphone wind screen, 9V battery and case.

Model No: 407750

1,296.00 AED 1296.0 AED 1,296.00 AED 1,319.00 AED

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العلامة التجارية: Extech Instruments
Warranty: 1 Year

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Key Features:

Dual frequency weighting: Selectable A & C weighting, providing measurement flexibility for regulatory (A-weighting) or flat-response (C-weighting) environments.

Time response options: Supports both FAST (~125 ms) and SLOW (~1 s) response modes to match measurement contexts (e.g., transient vs steady noise).

Measurement range: Covers 30 dB to 130 dB, making it suitable for quiet to loud environments.

High accuracy: Rated at ±1.5 dB (Type 2) meeting ANSI & IEC standard requirements for sound level measurement.

Large back-lit display plus analog bargraph: Easy to read in field or dim environments, enhancing usability.

PC Interface & data capture: Includes RS-232 interface (PC connectivity) for real-time data logging and analysis on a computer.

Analog AC/DC outputs: Provides analog output (AC and DC) for external recorder or logging equipment integration.

Background Noise Absorber (BA) mode: Allows measurement of specific equipment noise by suppressing ambient background noise floor in the measurement context.

Auto & Manual Ranging: Offers both automatic detection of best range and manual selection of ranges (six 10 dB steps) for more control in varying environments.

Tripod mount and portable housing: Features tripod mount point for field stability and a compact design (~240 g) for easy transport.

 

Key Technical Specifications:

Measurement Range & Accuracy

  • Measuring range: 30 dB to 130 dB (A-weighting) and 35 dB to 130 dB (C-weighting).
  • Accuracy: ±1.5 dB (Type 2) under ANSI/IEC 651 / IEC 60651 standards.
  • Resolution: 0.1 dB display increment.

Frequency & Time Weighting

  • Frequency weighting: Selectable A-weighting and C-weighting.
  • Time response: Selectable FAST (~125 ms) and SLOW (~1 s) modes.

Display, Interface & Connectivity

  • Large back-lit LCD display (3½ digit, 1999-count) plus analog bargraph for visual monitoring.
  • PC Interface: RS-232 output for data capture on PC.
  • Analog Outputs: AC output (0.707 V rms full scale) and DC output (10 mV per dB) for external recording/logging.

Microphone & Bandwidth

  • Microphone: Electret condenser type, approx. 0.5″ (12.7 mm) diameter.
  • Measurement bandwidth: 31.5 Hz to 8 kHz when using A-weighting.

Physical & Power

  • Dimensions: Approx 256 × 80 × 38 mm (10 × 3.1 × 1.5 in).
  • Weight: Approx 240 g (8.5 oz) including battery.
  • Power: 9 V battery supply (006P / 6F22) with optional AC adapter capability.

Special Features & Applications

  • Background Noise Absorber (BA) mode: Enables measurement of specific equipment noise in presence of high ambient noise levels.
  • Auto/Manual Ranging: Six measurement ranges in 10 dB steps, automatic or manual selection.
  • MIN/MAX and Max-Hold functions capture peak levels and maintain readings for documentation.
  • Tripod mountable: Designed for stable field measurements, machine noise assessment, regulatory monitoring.

 

For B2B Inquiries : 

Please send your E-Mail to info@dotearth.ae, and one of our sales associate will contact you.

Tel : 02 665 1126