Laboratory Ovens User manuals are sorted by product serial number and model codes. The first 4 digits of the serial number represent the manufacture date (YYMM) eg, 2203-XXXX = March 2022 build date. Models: TO-30G, TO-150G, TOH-150F October 2023 - August 2024 (2310 - 2408) September 2024 - current (2409 - current)
