Environmental Monitoring Equipment & Supplies • Sales, Rental & Service by Enviro-Equipment — Charlotte, North Carolina USA

Quest Q-300 Noise Dosimeters 5-Pack Kit Rental
  • Three simultaneous dosimeters in one
  • Long battery life
  • Sound Level Meter (SPL Display)
  • "A" and "C" weighting
  • Slow and Fast response
  • 3 Simultaneous thresholds
  • User-Selectable 3,4,5 & 6 dB Exchange rate
  • Percent Dose
  • Elapsed Time Logging

This item is no longer available for rent.

The Q-300 has been approved by the Mine Safety and Health Administration (MSHA). The default setup for Enviro-Equipment's Q-300 rentals is for OSHA Hearing Conservation, OSHA Noise Compliance, and American Conference of Governmental Industrial Hygienists (ACGIH). The Quest Q-300 can be programmed for other governing bodies or studies if necessary.

The Q-300 is a highly versatile, multi-function datalogging noise dosimeter. It performs a wide variety of acoustical measurements for applications such as workplace evaluations, personal exposures, compliance assessments and environmental analysis. Its tough package makes it ideal for industrial, military, mining and enforcement use. RF shielding and intrinsically safe design means the Q-300 can go where you need it.

While the Q-300 is easy to use, it provides the details and flexibility required by industrial hygiene, safety and environmental professionals. The datalogging dosimeter is housed in a tough compact aluminum case and operates with the user in mind. The clear display and easy-to-use keypad, make operation the way it should be, logical.

No matter what information you need, the Q-300 has it. The unit will calculate, display and store Sound Pressure Levels, Max and Min Levels, Dose and Projected Dose, and Exposure in Pascal Squared Hours. Time histories for sound levels and peaks, plus statistical tables are readily available for print out.

Items Included:
  • 5x Quest Q-300 Noise Dosimeters
  • Data Download Cables
  • 5x Microphones
  • Carrying Case
  • 2x Acoustic Calibrators (114dB 1000Hz)
  • Flat Head Screwdriver
  • User Manual


ANSI S1.25 - 1991, ANSI S1.4 - 1983: Type 2
IEC 651 - 1979, IEC 804 - 1985: Type 2
IEC 1252 - 1993

Measuring Range

40 - 110dB or 70-140dB. Maximum level is for sinusoidal signals. A signal with a 10dB crest factor will be measured accurately if its RMS level is 10dB below the maximum level for the range. Peak detector range is 70-114dB or 100-144dB.


True RMS, 63dB Pulse Range

Data Output

Requires Interface Modeules connected to the microphone connector. Parallel operation or Selectable baud: 300, 600, 1200, 2400, 4800, 9600, 19200


8mm Shoulder-Mount, Type 2. One piece system: Cable, Connector, and Microphone


Single 9-volt alkaline provides approximately 48 hours of operation

Integration Time

Signal dependent: With a 3dB Exchange rate and a signal level of 140dB the integration time would be 62 hours. As the signal level decreases and the exchange rate increases, the time increases to 145 hours maximum.

Memory, Clock, and Calendar Battery Backup

Lithium cell, 1 to 2 year life not including time that the 9 volt battery is installed


-10° to +50°C operating; -20° to +60°C storage (battery removed)


0 to 95% non-condensing

Electromagnetic Field Effects

Negligible below 50 Oersteds at 50 to 60 Hz. Tested for RF succeptibility with <1dB error at field strengths to 10 V/m over the frequency range of 10 MHz to 500 MHz.


5.5 x 2.8 x 1.4 inches (140 x 70 x 40 mm)


15.5 oz. (440 grams)


Cast aluminum with security cover

Quest Q-300 Noise Dosimeter Manual1.64 MB