You have entered a value in the highlighted fields below that contain invalid characters. Please revise your selection using valid characters only.

Product may not be an exact match for your search

You previously purchased this product. View in Order History



Sound Level Meter, 70 dB, 140 dB, 1.4 dB, 5 °C, 40 °C


Image is for illustrative purposes only. Please refer to product description.

Manufacturer Part No:
Order Code:
  • Enter your custom part number in the textbox above
  • Maximum Part Numbers added.
    Delete older entries to add more.

Part Number Saved

Part Number Saved

Technical Datasheet:
SL400   Datasheet
Supply Frame Models Link
See all Technical Docs

Product Information

Want to see similar products? Simply select your required attributes below and hit the button ×







Find similar products Choose and modify the attributes above to find similar products.

Technical Documents (1)

Product Overview

SL400 is a personal noise dosimeter with a USB interface. Sound level monitoring is essential to determine what protective measures are required for employees who are routinely exposed to loud noise. Perform noise surveys in compliance with OSHA, MSHA, DOD, ACGIH, and ISO standards with the Extech SL400 dosimeter. An SL400 noise accumulation survey can determine total sound exposure over an 8-hour period. This compact, lightweight dosimeter can also serve as a sound level meter, logging up to 999,999 readings with sampling times between 1 second and 24 hours. The SL400 comes with PC software to control setup and retrieve stored events or analyse real-time measurements. Typical applications are personal accumulated noise exposure measurement, workplace noise assessment, OSHA and other regulatory agencies compliances.
  • Measures frequency weighted noise exposure and peak (C, Z) sound level
  • Adjustable criterion level, exchange rate, and threshold
  • One user-defined measurement setup
  • Criterion is 30 to 140dB in 0.1dB steps, 3, 4, 5 or 6dB exchange rate
  • 20Hz to 8KHz frequency bandwidth, memory is dose: 10,000points/SLM: 999,999points
  • Dimension is 107 × 65 × 33mm
  • 2 years warranty
  • Condenser 32" (81.3cm) microphone
  • 30 to 140dB in 0.1dB steps threshold
  • Fast, slow, impulse response rate


SL400 personal noise dosimeter with a USB interface, Belt clip, Clip-on 0.5" (12.7mm) microphone with 32" (81.3cm) cable and windscreen, 9V battery, Software, USB cable, and carrying case.

5 total stock globally Need more?

5 UK stock available for 5-8 business days delivery

Due to market conditions delivery times are for general guidance only and may be subject to change at short notice

$1,291.55 ( $1,485.28  Inc. GST)

Pricing is unavailable. Please contact customer services.

Price for:
Multiple: 1 Minimum: 1
  • 1+
Quantity Price (Incl GST) Your Price (Incl GST)
1+ $1,291.55 ($1,485.28)
Promotional price
Contract Price
Web only price
Web only contract price
  ( )
Quantity Price (Incl GST) Your Price (Incl GST)

Pricing is unavailable. Please contact customer services.

No longer stocked:: No Longer Manufactured::
Add to Basket Add to Basket Pre-Order
Restricted Item
Enter Your Line Note
Total Price:
Total Price: ( )
Total Price: --