概要（Overview）

Fisher Isotemp 800 Series forced air, programmable ovens are available in three sizes: small (Model 825), medium (Model 838) and large (Model 851). All models provide PID microprocessor control at operating temperatures ranging from 50°C (122°F) to 325°C (617°F). The Model 825 accommodates a maximum of five shelves. The Models 838 and 851 hold eight and eleven shelves, respectively.