TSI Edge 4 Plus Personal Noise Dosimeter

Overview

The TSI Edge 4 Plus Personal Noise Dosimeter is a compact, Class 2-certified instrument engineered for precise, real-time assessment of occupational noise exposure in accordance with international acoustical standards—including IEC 61672-1:2013, ANSI S1.25-1991, and ISO 9612:2009. Designed for continuous wear during full-shift monitoring, it employs a calibrated ¼″ pre-polarized electret condenser microphone to capture sound pressure levels across a dynamic range of 70–140 dB. Its dual-dosimeter architecture enables simultaneous evaluation against distinct regulatory frameworks—such as OSHA’s 5-dB exchange rate and ACGIH’s 3-dB exchange rate—without requiring hardware reconfiguration. The device operates on a robust lithium-ion battery delivering ≥40 hours of field operation under typical duty cycles (with display timeout enabled), making it suitable for extended industrial deployments where charging infrastructure is limited.

Key Features

• Full-color OLED display with high-contrast readability under variable lighting conditions—including direct sunlight and low-illumination environments
• Dual independent dose calculation engines supporting concurrent compliance tracking per OSHA 1910.95 (5-dB exchange rate) and ACGIH TLV® (3-dB exchange rate)
• Field-replaceable ¼″ pre-polarized electret condenser microphone with integrated windscreen thread interface
• Bluetooth® 4.2 Low Energy connectivity enabling secure, low-latency pairing with the Edge dB mobile application
• IP54-rated enclosure providing protection against dust ingress and water splashing from any direction
• Configurable auto-display-off function to extend battery life without compromising data integrity
• LED dose indicator that flashes when exposure thresholds are exceeded—providing immediate visual feedback to supervisors or safety officers
• Lock mode prevents accidental termination of active measurements or unintended parameter changes during field use

Sample Compatibility & Compliance

The Edge 4 Plus is validated for use in diverse occupational settings—including manufacturing plants, energy generation facilities, aviation maintenance bays, municipal infrastructure projects, and entertainment venues—where personnel are exposed to intermittent, impulsive, or steady-state noise sources. It complies with Class 2 performance requirements per IEC 61672-1:2013 and meets the technical specifications outlined in OSHA Technical Manual Section III: Chapter 5 and NIOSH Publication No. 2008-151. Preloaded regulatory presets ensure alignment with U.S. federal (OSHA), international (ACGIH), and EU-based (Directive 2003/10/EC) hearing conservation programs. All measurement data—including time-history logs, dose accumulation curves, and L_EX,8h calculations—are traceable and auditable in accordance with GLP principles and FDA 21 CFR Part 11-compliant software workflows when processed via TSI’s official dosimetry management suite.

Software & Data Management

The Edge dB mobile application (iOS 10.0+, Android 4.3+) serves as the primary interface for remote configuration, live streaming, and post-processing of exposure data. Users can monitor multiple Edge 4 Plus units simultaneously within Bluetooth range—enabling zone-based exposure mapping without physical proximity to workers. The companion desktop software—TSI DoseTrack™—supports advanced analysis including percentile statistics (L₁₀, L₅₀, L₉₀), octave-band spectral decomposition (optional firmware upgrade), and automated report generation compliant with OSHA Form 300A and ISO 45001 documentation requirements. All exported datasets retain full metadata (timestamp, GPS coordinates if enabled, microphone calibration ID, user-defined tags), ensuring chain-of-custody integrity for regulatory audits.

Applications

• Quantitative assessment of worker noise exposure during shift-long monitoring in heavy machinery operations
• Baseline surveys for hearing conservation program development in new or modified production lines
• Validation of engineering controls (e.g., acoustic enclosures, mufflers) by comparing pre- and post-intervention exposure profiles
• Compliance verification for contract labor deployed across multi-site infrastructure projects
• Forensic analysis of noise-related incident reports in transportation and construction sectors
• Academic and occupational hygiene research requiring portable, high-fidelity personal dosimetry with synchronized multi-unit deployment capability

FAQ

What standards does the Edge 4 Plus comply with?
It conforms to IEC 61672-1:2013 Class 2, ANSI S1.25-1991, and ISO 9612:2009 for personal noise dosimetry, and supports regulatory reporting aligned with OSHA 1910.95, ACGIH TLV®, and EU Directive 2003/10/EC.
Can the microphone be replaced in the field?
Yes—the ¼″ pre-polarized electret condenser microphone is fully field-replaceable using standard tools and includes threaded mounting for compatibility with optional windshields and calibrator adapters.
Is the device suitable for impulse noise environments?
While optimized for continuous and fluctuating noise, its 100 µs rise time and peak hold capability support reliable assessment of impulsive events up to 140 dB(C) peak, consistent with ISO 1999:2013 guidance on peak exposure limits.
How is data security maintained during Bluetooth transmission?
All Bluetooth communication uses AES-128 encryption; pairing requires manual initiation and confirmation on both device and host application, preventing unauthorized access or spoofing.
Does the Edge 4 Plus support GLP/GMP audit trails?
When used with TSI DoseTrack™ v3.2+, the system generates timestamped, user-authenticated audit logs—including calibration history, configuration changes, and export events—meeting core requirements of GLP and FDA 21 CFR Part 11 for electronic records.