Legacy Sound Level Meters from Cirrus Research plc

Cirrus has been manufacturing sound level meters, noise dosemeters and noise measurement instruments for over 40 years. Over this time we have produced many different instruments, many of which have now been replaced or superseded.

List below are some of the products that are no longer available. To help you find a suitable replacement, we have listed the closest match from our current product range.

If you would like any information or assistance in finding a replacement or an equivalent instrument, please contact us and we will be pleased to help.



Instrument Name/Product Code Comments Features Current Equivalent
CR:303 Sound Level Meter Obseleted 2007 Type 2, Sound Level, Max Hold CR:306 Sound Level Meter
CRL 221 Sound Level Meter A,B & C versions Type 2, Sound Level CR:306 Sound Level Meter
CRL 222 Integrating Sound Level Meter A Version Type 2, Leq, SEL, Max Hold CR:262A Sound Level Meter
CR:162A optimus Sound Level Meter
CRL 235 Grade Convertible Sound Level Meter A Version & Plug-in Units Type 1 or Type 2 CR:162B optimus Sound Level Meter
CR:161B optimus Sound Level Meter
CRL 237 Grade Convertible Sound Level Meter A & B Versions Type 1 or Type 2, Octave Band Filters CR:162B optimus Sound Level Meter
CR:161B optimus Sound Level Meter
CR:162C optimus Sound Level Meter
CR:161C optimus Sound Level Meter
CRL 236 Data Logging Sound Level Meter CRL236, CRL236A, CRL236AF Versions Type 1 Data Logging Sound Level Meter CR:1710 optimus Sound Level Meter
CR:171A optimus Sound Level Meter
CR:171B optimus Sound Level Meter
CRL 239 Real Time Octave Band Sound Level Meter A & B Versions Type 1 Data Logging Sound Level Meter with Real Time 1:1 Octave Band Filters CR:161C optimus Sound Level Meter
CR:171A optimus Sound Level Meter
CR:171B optimus Sound Level Meter
CRL 412 Sound Level Meter A & X Versions CR:306 Sound Level Meter
CRL 700 Data Logging Sound Level Meters CRL 702, CRL 703 & A Versions Type 1 & Type 2 Data Logging Sound Level Meters CR:162C optimus Sound Level Meter
CR:161C optimus Sound Level Meter

CR:1710 optimus Sound Level Meter
CR:171A optimus Sound Level Meter
CR:171B optimus Sound Level Meter
CRL 700 Series Noise Dosemeters CRL 701, CR:701B, CR:710B doseBadge Noise Dosemeter
CR:800B Series Sound Level Meters   Class 1 & Class 2 Data Logging Sound Level Meters CR:800C Sound Level Meters
optimus red Sound Level Meters
optimus green Sound Level Meters
CR:260 Sound Level Meter Class 1 & Class 2 Integrating Sound Level Meters optimus red Sound Level Meters
CR:260+ Sound Level Meters Class 1 & Class 2 Integrating Sound Level Meters with data logging optimus red Sound Level Meters
CR:272 & CR:271 Sound Level Meter Type 2 and Type 2 Integrating Sound Level Meters CR:162A optimus Sound Level Meter
CR:161A optimus Sound Level Meter
CR:274 & CR:273 Octave Band Sound Level Meters CR:162C optimus Sound Level Meter
CR:161C optimus Sound Level Meter
CRL 256 Sound Level Meter   Type 2 Integrating Sound Level Meter CR:162A optimus Sound Level Meter
CRL 254 Sound Level Meter Type 2 Integrating Sound Level Meter CR:162A optimus Sound Level Meter
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