CNex GB-300 zone-1 SENTRY Wireless Temperature Monitoring Issued by CNEX (GB-300 zone-1) Certificate type CoC Ex China Certificate no CNEx 21.4447X Expiration date 13.12.2026 Document file CNEx 21.4447X GB-300 Zone-1-Eng.pdf Related file(s) CNEx 21.4447X GB-300 Zone-1-Chineese.pdf