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  • Easy, Flexible Operation

    View data on both the large backlit LCD display and from iOS® or Android™ mobile devices using the ExView app via Bluetooth.

  • Standalone Capture and Display

    Measure sound level from 30 to 130 dB with ‘A’ weighted frequency for human hearing, record max/min readings, and freeze the display with ‘data hold’ feature.

  • Portable Collection, Analysis, and Reporting

    Export .CSV data; create and send PDF reports including photos of the measurement location taken with a connected smartphone or tablet camera.

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General Specifications
Frequency Bandwidth
31.5 Hz to 8 kHz
Response Time
Sampling Rate
Fast: 125 ms (8 times/s); Slow: 1000 ms (1 time/s)
Sound Range (dB)
30 to 130 dB
Sound Range (dB) Basic Accuracy
±1.5 dB
Sound Range (dB) Max Resolution
0.1 bB
Wireless Connectivity
Bluetooth® (via ExView iOS/Android mobile app)
Wireless Transmission Range
up to 90 m line of sight
Additional Details
6 × 2.1 × 1.1 in (153 × 53 × 28 mm)
Operating Conditions
32 to 104°F (0 to 40°C),≤80% RH
3 × AAA (1.5V) batteries
2 years
3 oz (84.6 g)
Related Documents
Export Restrictions

Export Restrictions

The information contained in this page pertains to products that may be subject to the International Traffic in Arms Regulations (ITAR) (22 C.F.R. Sections 120-130) or the Export Administration Regulations (EAR) (15 C.F.R. Sections 730-774) depending upon specifications for the final product; jurisdiction and classification will be provided upon request.

Extech SL250W