Extech's SL400 Sound Level Meter measures sound pressure levels from 30 to 143 dB over a frequency range of 20 Hz to 8 kHz. It functions as a noise dosimeter and data logger, ideal for monitoring environmental noise and workplace safety. Common applications include industrial noise evaluation and compliance with occupational noise regulations. https://elecena.pl/product/28942438/extech-sl400-sound-level-meter-data-logger-30-143-db-personal-dosimeter 2025-06-12 https://elecena.pl/product/28942438/extech-sl400-sound-level-meter-data-logger-30-143-db-personal-dosimeter 2026-04-13 https://elecena.pl/product/28942438/extech-sl400-sound-level-meter-data-logger-30-143-db-personal-dosimeter 2026-05-06 https://elecena.pl/product/28942438/extech-sl400-sound-level-meter-data-logger-30-143-db-personal-dosimeter 2026-05-28 https://elecena.pl/product/28942438/extech-sl400-sound-level-meter-data-logger-30-143-db-personal-dosimeter 2026-06-20 https://elecena.pl/product/28942438/extech-sl400-sound-level-meter-data-logger-30-143-db-personal-dosimeter 2026-07-13 https://elecena.pl/product/28942438/extech-sl400-sound-level-meter-data-logger-30-143-db-personal-dosimeter 2026-08-05 https://elecena.pl/product/28942438/extech-sl400-sound-level-meter-data-logger-30-143-db-personal-dosimeter 2026-09-22 https://elecena.pl/product/28942438/extech-sl400-sound-level-meter-data-logger-30-143-db-personal-dosimeter 2026-10-15