Product Summary Clean oven suitable for temperature test in dust-free environment. Features of Clean Oven (DE411) Features Adoption of anti-fouling caster (preventing wheel contamination during transportation) Features Improvement of visibility of HEPA filter replacement timing by three color indication. Features Improvement of safety by phase-reversal relay, detecting of incorrect wiring of power supply when installing. Features Cable diameter changed from 30mm I.D to 33mm I.D when compare withconventional equipments. Features More options when compare with conventional equipment.