IECEx PRE 18.0087X SENTRY GB-300 Wireless Temperature Monitoring System Issued by DNV GL Presafe AS Certificate type IECEx certificate zone 2 Certificate no IECEx PRE 18.0087X Expiration date 31.12.2040 Document file IECEx_PRE_18.0087X_Issue 1.pdf Related file(s) IECEx_PRE_18.0087_000, Signed.pdf