Casella CEL’s compact CEL-120
acoustic calibrator has recently
achieved Physikalisch-Technische
Bundesanstalt (PTB) approval.

The PTB is Germany’s National
Institute for Natural and Engineering
Sciences and is similar in standing to
the UK’s National Physical
Laboratory (NPL).
The CEL-120 is believed to be one
of the world’s smallest acoustic
calibrators and is designed to
facilitate highly accurate calibration
of sound level meters in the field.

Casella’s CEL-620 sound level
meter is already similarly approved
and will now benefit from being
paired with the CEL-120 making it
suitable for workplace noise
monitoring.

Ben Henson, Casella
Measurement’s general manager,
says: “The CEL-120 sailed through
the raft of testing without a hitch and
we were never in any doubt that we
would get the approval.”
Type approval, although not
required in the UK, is ‘on the agenda’
in Spain where the Measuring
Instruments Directive 2004 is locally
implemented to include noise
measuring instrumentation.