TSI EDGE Personal Noise Dosimeter
| Brand | TSI |
|---|---|
| Origin | USA |
| Model | EDGE |
| Measurement Range | 70 dB to 140 dB (A-weighted, linear RMS) |
| Frequency Range | 20 Hz to 8 kHz (±1.5 dB per IEC 61252:2017) |
| Self-Noise | <2.5 dB(A) |
| Accuracy | ±0.5 dB (per ANSI S1.25-1991 & IEC 61252:2017) |
| Operating Temperature | −10 °C to +50 °C |
| Ingress Protection | IP54 |
| Certifications | MSHA, ATEX Category 3G (SIRA), CSA C/US Class I Div 2, IECEx Simtars Ex ib IIC T4 Gb |
Overview
The TSI EDGE Personal Noise Dosimeter is an intrinsically safe, wearable occupational noise monitoring instrument engineered for high-fidelity, real-time assessment of time-weighted average (TWA) noise exposure and dose accumulation in industrial environments. Based on the principles of precision electret condenser microphone transduction and digital signal processing compliant with IEC 61252:2017 and ANSI S1.25-1991, the EDGE continuously samples sound pressure levels at a minimum rate of 16 kHz, applying real-time A-weighting, exponential time weighting (Fast/Slow), and exchange rates (3-dB or 5-dB) as defined by OSHA, MSHA, EU Directive 2003/10/EC, and ISO 9612. Its compact, low-profile design—measuring just 85 g—enables unobtrusive mounting on the shoulder or collar, ensuring microphone positioning within the worker’s hearing zone while minimizing movement artifacts and positional bias.
Key Features
- Triple-dose-group architecture: Simultaneously computes and logs up to three independent noise exposure profiles using distinct regulatory configurations—e.g., OSHA 8-hr TWA (5-dB exchange rate), EU 8-hr LEX,8h (3-dB exchange rate), and MSHA 8-hr TWA—without requiring device reconfiguration or post-processing.
- Intrinsically safe certification suite: Certified to MSHA 30 CFR Part 18, ATEX II 3G IIB T4, CSA C/US Class I Division 2 Groups A, B, C, D, and IECEx Simtars Ex ib IIC T4 Gb—enabling deployment in hazardous locations including underground mining, petrochemical refineries, and grain handling facilities.
- High-contrast OLED display with intuitive menu navigation: Provides immediate visual feedback of current LAeq, % dose, remaining exposure time, peak SPL (up to 140 dB(C)), and battery status—even under low-light or dusty conditions.
- Robust environmental resilience: IP54-rated enclosure resists dust ingress and water splashing; operational across −10 °C to +50 °C ambient temperatures and 10–95% RH (non-condensing).
- Extended logging capacity: Stores >30 days of second-by-second data (including LAF, LAS, LCPeak, and dose metrics) with automatic timestamping and user-defined event markers.
Sample Compatibility & Compliance
The EDGE is designed exclusively for human-worn occupational noise exposure assessment and does not support bulk material, fluid, or airborne particle sampling. It complies fully with international standards governing personal dosimetry: IEC 61252:2017 (specification for personal sound exposure meters), ANSI S1.25-1991 (R2020), and ISO 9612:2009 (acoustics—determination of occupational noise exposure). All calibration and verification procedures align with NIST-traceable reference sources and are compatible with TSI’s CalCheck™ acoustic calibrator (Model 902). Device firmware and measurement algorithms undergo annual third-party audit to ensure conformance with GLP-aligned data integrity requirements for regulatory reporting.
Software & Data Management
Data retrieval and analysis are performed via TSI’s proprietary EDGE Connect desktop application (Windows 10/11, 64-bit), which supports automated batch download, spectral histogram generation, exposure trend visualization, and customizable report export (PDF, CSV, XML). The software enforces role-based access control, full audit trail logging (per FDA 21 CFR Part 11 Annex 11 principles), and encrypted local storage. Exported datasets include metadata such as operator ID, calibration history, instrument serial number, and GPS-assisted location tagging (when paired with optional Bluetooth-enabled GNSS module). Raw binary files retain full waveform fidelity for forensic reanalysis.
Applications
The EDGE is deployed across high-noise industries where regulatory compliance, worker safety accountability, and exposure trend analysis are mission-critical: underground and surface mining operations (MSHA-regulated); oil & gas upstream/downstream facilities (ATEX/IECEx zones); manufacturing assembly lines (ISO 45001-aligned monitoring); construction sites subject to OSHA 1926.52; and municipal infrastructure maintenance crews. Its triple-dose capability is particularly valuable during multi-jurisdictional projects—e.g., cross-border infrastructure development—where simultaneous adherence to U.S., EU, and Australian noise exposure limits is required.
FAQ
Does the EDGE support real-time wireless data streaming?
No—the EDGE operates as a standalone, non-transmitting dosimeter to maintain intrinsic safety integrity. Data transfer occurs only via secure USB-C connection during post-shift download.
Can the device be calibrated in-field without returning to a lab?
Yes—using the TSI CalCheck™ (902) acoustic calibrator, users can perform full functional verification and sensitivity adjustment at 114 dB and 94 dB reference levels, with results logged automatically into the device memory.
Is firmware update capability available?
Yes—firmware updates are delivered through EDGE Connect and require manual initiation; all updates preserve existing calibration coefficients and historical data integrity.
What battery life can be expected during continuous operation?
With standard AA alkaline cells, the EDGE delivers ≥120 hours of continuous logging; lithium AA batteries extend this to ≥200 hours under identical conditions.
How does the EDGE handle impulse or impact noise events?
It captures true peak C-weighted levels up to 140 dB with 1-µs rise time response and stores maximum LCpeak alongside integrated dose metrics—fully compliant with ISO 1999:2013 annexes for impulsive noise assessment.
