Tec 850 SEV Anesthesia Vaporizer, Reference Number 1177-9850-SEV
Due to a manufacturing issue, certain Tec 6 Plus and Tec 800 series vaporizers can deliver less anesthetic agent than the vaporizer dial setting.
US Nationwide. Global Distribution.
https://www.accessdata.fda.gov/scripts/ires/index.cfm?Product=Z-0818-2025