# Extech 407760-NISTL USB Sound Level Datalogger with NIST Certificate (Single Point) # Extech 407760-NISTL USB Sound Level Datalogger with NIST Certificate (Single Point) ## Key Features At A Glance - Sound level measurement range from 30 to 130 dB with ±1.4 dB basic accuracy - Frequency range from 31.5 Hz to 8 kHz with selectable A and C weighting - Datalogging capacity up to 129,920 records with selectable sampling rate and real-time clock - Selectable Fast (125 ms) and Slow (1 s) response time settings - Integrated USB connector for direct PC connection — no separate interface cable required for download - Two start methods: PC-programmed or manual initiation - Designed to meet ANSI and IEC 61672 Class 2 standards - Compact form factor (5.1 x 1.1 x 0.9 in, 1 oz) with 0.5 in electret microphone The Extech 407760 is a USB-based sound level datalogger designed for unattended acoustic measurement and recording. The instrument combines a 0.5-inch electret microphone, integrated datalogging electronics, and a built-in USB connector in a compact handheld form factor measuring 5.1 x 1.1 x 0.9 inches and weighing 1 ounce. It is designed to meet ANSI and IEC 61672 Class 2 standards for sound level meters. The 407760 captures sound level readings across a 30 to 130 dB measurement range and a 31.5 Hz to 8 kHz frequency range, with both A-weighting and C-weighting selectable to match common acoustic measurement protocols. Response time is selectable between Fast (125 ms) and Slow (1 s) to suit the dynamics of the sound source under measurement. Basic accuracy is specified at ±1.4 dB. ValueTronics International stocks and supports the Extech 407760 from our 20,000 square foot secure warehouse at 1675 Cambridge Drive, Elgin, Illinois. Unlike drop-ship resellers, units leaving our facility are inspected and prepared by our in-house team before shipment, with full ValueTronics support standing behind the sale. ## Brand Heritage Extech Instruments has operated as a subsidiary of FLIR Systems since 2007, and FLIR was acquired by Teledyne Technologies in 2021. Extech-branded test and measurement instruments continue to be produced and supported under the Teledyne FLIR corporate umbrella. ## Compare Other Models in This Series The Extech 407760 is offered as a single instrument configuration with one variant differentiated by calibration documentation. The base 407760 ships with the unit and standard accessories; the 407760-NISTL adds a single-point NIST calibration certificate at the time of shipment. Both configurations share identical hardware, measurement specifications, datalogging capacity, and included accessories. The difference is the calibration documentation supplied with the unit at delivery. Each new configuration below links to its own dedicated product page with condition-matched pricing and current availability. Select the variant that matches your documentation requirements at the time of receipt. The 407760 base configuration is the standard choice when calibration documentation is not required at receipt or will be obtained separately. The 407760-NISTL is the correct selection when a single-point NIST-traceable calibration certificate is needed alongside the instrument from day one — common in regulated environments, formal acoustic surveys, and quality system contexts where traceable documentation must accompany the instrument. Refer to the comparison table for the specific differences between the two configurations. Model Description Range Accuracy **407760-NISTL** USB Sound Level Datalogger with NIST Certificate (single point) 30 to 130 dB ±1.4 dB 407760 USB Sound Level Datalogger 30 to 130 dB ±1.4 dB Additional differences in specifications beyond the few shown above are not listed here — see each model's full specifications below. ## Accessories Supplied - 3.6V Lithium battery - Windows compatible software - USB cover - Tripod - USB extension cable - Windscreen - NIST Certificate (single point) ## Product Core & Specifications Specification Value Range 30 to 130 dB Frequency Range 31.5 Hz to 8 kHz Basic Accuracy ±1.4 dB Weighting A and C Response Time Fast (125 ms) / Slow (1 s) Datalogging 129,920 points PC Interface USB Microphone 0.5 in. Electret Standards Designed to meet ANSI and IEC 61672 Class 2 Dimensions 5.1 x 1.1 x 0.9 in. (130 x 30 x 25 mm) Weight 1 oz (20 g) **Important:** Includes 3.6 V lithium battery; replacement batteries are available separately as pkg of 2 under part number 42299.Recommended pairing: the 407760-NISTL variant includes a single-point NIST calibration certificate for applications requiring traceable acoustic measurement documentation at receipt. **Please review the Manufacturer's Data Sheet to verify published specifications. Feedback on this webpage is always welcome — please reach out to your Test Architect at any time for questions or concerns. Thank you, we truly appreciate you being our customer.** ## Details - **Price:** 367.99 USD - **Vendor:** Extech - **Type:** Data Log - **Tags:** Extech, Manufacturers, Meters & DAQ, product_manual_group_2, Product_new, Sound ## Variants | Variant | Price | Available | |---------|-------|-----------| | Default Title | 367.99 USD | In stock | ## Images - 407760-NISTL Extech Sound Meter --- > Source: [ValueTronics](https://valuetronics.com/products/407760-nistl-extech-sound-meter-new) > Updated: 2026-05-30