2022 Cirrus Research Plc CR:171B Cirrus CR:171B Class-1 Sound Level Meter Rental

The specifications for the optimus green sound level meters are quite long and detailed. This information is available either on the product datasheet or from your local distributor. If you would like a more detailed specification, please contact us and we will be pleased to help.
Listed below is a summary of the main specification points for the optimus red sound level meters.


Measurement Functions
LXY, LXYMax, LXYMin
LXeq, LCPeak, LZPeak, LAPeak LCeq-LAeq, LXE, LAIeq
Graph of Short LAeq, LCPeak
Measurement Run Time
Integrators 2 & 3: TWA, Dose %, Est Dose %
Real-Time 1:1 Octave Bands (Graphical & Numeric)
Real-Time 1:3 Octave Bands (Graphical & Numeric)
NR & NC values & curves
Leq LF (20Hz to 200Hz)
14 Statistical Ln% Values
Stored Functions
LXYMax & Time History of LXYMax
LAeq, LCeq, LZeq, LCPeak, LZPeak, LAPeak, LAIeq
Time History of LAeq, LCeq, LZeq, LCPeak, LZPeak, LAPeak, LAIeq
Integrators 2 & 3: LAVG , TWA. % Dose
Time History of LAVG
1:1 & 1:3 Octave Bands: Overall Leq & Leq Time History for each band
NR & NC values & curves
Ln Values: 14 independent statistical values
Audio recording during measurement
Time, date & duration of measurement