The CR:308/310 is a basic sound level meter that is perfect when you need basic noise information, capable of measuring the maximum sound level (LMax) and the sound pressure level (SPL).

The Cirrus CR:308/310 sound level meters provide an entry level for noise measurement across multiple sectors, and meets current international standards for noise measurement instrumentation.

Both variants provide the SPL and LMax readings, which can help you determine how loud something/somewhere is without overcomplicating the data with other acoustic information. Both variations can also measure different frequency weightings, which provides more detailed and accurate data than many other basic sound level meters on the market.


  • Simple to use
  • Clear, backlit LCD display
  • Custom adjustable noise level threshold (308)
  • DC and AC out
  • Long battery life
  • The 310 model can print results directly to a portable printer
  • People who need a basic understanding of noise levels
  • Alarm installers
  • Simple noise testing
  • Machine and factory noise
  • Noise ordinance surveys
  • Fire alarm testing
  • Basic noise at work assessments (not to 2006 regulations)

Applicable Standards:

IEC 61672-1:2013 Class 2

Measurement Range:

30dB (A) to 130dB (A)

40dB (C) to 130dB (C)

Frequency Weightings:

A and C

Time Weightings:

Fast (F) and Slow (S)

Display Functions:

Normal, Maximum, Minimum, C peak

Measurement Functions:

LAF, LAS, LCF, LCS, LCpk

Leq (CR:310), LEq8h (CR:310)

Noisefloor:

< 25dB (A) and 35dB (C)

Display Flags

Threshold Limit, Overload, Under-range

Auto Calibration Range:

±4.5dB

Reference Point:

94dB (1kHz), 92.9dB (8kHz)

Setting Time:

60s

Display:

Backlit 128×64 LCD,resolution 0.1 dB.

Resolution:

0.1dB

Electrical Inputs:

5V power in via mini USB

Power:

2 x AA/LR6 1.5V batteries

Or

5V DC via Mini USB

Battery Life:

24hrs

Microphone:

½˝ pre-polarised electret condenser type HY:205

Operating Temperature:

0°C to +40°C

Operating Humidity:

25% to 90%

Atmospheric Pressure:

65 kPa to 108kPa

Storage Temperature:

-20°C to +60°C

Dimensions:

215mm×68mm×32 mm

Weight:

220g(including battery)

Electrical Outputs:

AC (Tip 3.5mm jack) and DC (middle 3.5mm jack)

DC Output:

voltage 15mV/dB, range 450mV to 1950mV

AC Output:

RMS 2V

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