Key facts
- Brand
- EXTECH
- Model
- 407355
- Industry
- Industrial
- Documents
- 3
- Languages
- EN
- Last added
- 2026-10-17
Start here
Extech 407355 Noise Dosimeter User's Guide
This manual provides instructions for the Extech 407355 Personal Noise Dosimeter, a device designed to test noise exposure in accordance with OSHA, MSHA, DOD, ACGIH, and ISO standards. The instrument features a built-in RS-232 PC interface for downloading data and can operate in both Sound Level Meter (SLM) mode and Dosimeter mode.
The guide details the meter's physical components, including the LCD display, push-buttons, and microphone connector. It explains how to power the unit, perform noise surveys, and configure parameters such as Criterion Level, Threshold Level, Exchange Rate, and Response Time. Additionally, it covers the use of event memory banks for storing survey data and the procedure for clearing memory.
Extech 407355 specifications
| Measurement ranges (SPL) | 70 to 140dBA |
|---|---|
| Datalogging capacity | 8800 sets |
| Accuracy | ±1.5dB |
| Operating Temperature | 32 to 122 oF (0 to 50oC) |
| Battery power | Four (4) 1.5V 'AAA' batteries |
All Extech 407355 documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in these manuals
What standards does the Extech 407355 comply with?
The device is designed to test noise exposure in accordance with OSHA, MSHA, DOD, ACGIH, and ISO standards.
Can the meter be used as a sound level meter?
Yes, the meter can also be used in SLM (sound level meter) mode where sound pressure levels are monitored from 70 to 140dB.
How do I turn the meter off?
Press and hold the green power button until the display counts down from 3dB to 0dB.
Can I store data in multiple memory banks?
Yes, the meter has five event memory banks (E1 through E5) that can be selected using the EVENT button.
What is the stated purpose of this device?
It is a personal noise dosimeter designed for measuring total sound exposure over an 8-hour period.
From: EXTECH 407355 Noise Dosimeter/Datalogger Product Datasheet
How many surveys can be stored on the unit?
The device stores up to five dosimeter surveys in its memory.
From: EXTECH 407355 Noise Dosimeter/Datalogger Product Datasheet