Manufacturer: TSI Quest / Quest Technologies (3M)
Model: Quest 2900 (Integrating Sound Level Meter)
Instrument Type: Type 2 / Class 2 Integrating Sound Level Meter
Measurement Parameters: Sound Pressure Level (SPL), Leq, Lavg, Peak, Max, Min, TWA, SEL, and Dose
Dynamic Range: 30 dB to 140 dB RMS across selectable ranges
Frequency Weighting: A, C, and Flat/Z weightings
Time Response: Fast, Slow, and Impulse
Display Interface: Backlit digital LCD screen displaying real-time numerical readings and continuous analog-style bargraph
Data Logging & Storage: On-board memory for automated time-history data collection, survey logging, and multi-study reporting
Regulatory Compliance: Meets ANSI S1.4-1983, ANSI S1.43-1997, IEC 60651, and IEC 60804 standards for OSHA and MSHA workplace compliance
Outputs / Connectivity: AC/DC signal output jack and RS-232 serial interface for PC downloading and analysis software
Power Source: 9V alkaline battery (approx. 20–25 hours operation) or external AC power supply
Included Components: Rugged protective carrying case, calibration screwdriver, windscreen, and microphone assembly





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