Ptb approval for calibrator

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.