CNex GB-300 zone-2 SENTRY Wireless Temperature Monitoring Issued by CNEX (GB-300 zone-2) Certificate type CoC Ex China Certificate no CNEx 21.4446X Expiration date 13.12.2026 Document file CNEx 21.4446X GB-300 Zone-2-Eng.pdf Related file(s) CNEx 21.4446X GB-300 Zone-2-Chineese.pdf