weatherproof microphone
G.R.A.S. exclusivity
calibrator automatic detection
self-check system based on charge injection
acoustic nose cone
IEC-61672 Class 1 certified by LNE, PTB and METAS
February 2012 issued by the PTB (Physikalisch-Technische Bundesanstalt)
Switzerland: type certification No. CH-A3-120296-00 of 31 February 2012 issued by METAS (Bundesamt für Metrologie)
France: type certification No. LNE-21674 Rev 0 of 21 July 2011 issued by LNE (Laboratoire National de métrologie et d’Essais
Germany: type certification No. PTB-1.63-4052726 of 6 Portugal: type certification No. 245.71.12.3.15 of 30 July 2012 issued by Instituto Português da Qualidade, I.P.
Spain: type certification No. 111839001 of 9 March 2015 issued by Centro Español de Metrologia (CEM).