An 18 in Cube: the 3.2 Cu Ft Vacuum Oven
The chamber is an eighteen inch cube, which works out to 3.2 cubic feet. Heat does not come from the walls here. Three aluminium shelves each carry their own 500W heater, an in-shelf sensor and a controller. Material sits on the heat rather than waiting for the air to bring it. Shelf surfaces run 17.5 by 17.25 in and sit 4.75 in apart. That gap halves to 2.25 in with the optional stackable shelves, which doubles usable area. Each shelf takes up to 20 lb. Electrical is 1,500 W either way, drawing 13.6 A at 110V or 6.8 A at 220V. Setpoint accuracy is 1 F and uniformity holds within 5% across the chamber. It reaches 100 F in about 35 minutes and 480 F in an hour.
Choosing This Across International Oven Over Its Siblings
This is the middle size in the range, and the reason to pick it is throughput without a forklift. The bench model handles a sample or a small purge; the largest needs a pallet and a dedicated circuit. At 260 lb on a floor stand, this one sits between them and rolls into a lab with room for a chest freezer. Internal tubing is stainless, which is what holds a deep vacuum for months rather than weeks. An oil-filled mechanical gauge resists the shipping damage that kills dry gauges. A check valve stops pump oil crawling back into the chamber when the pump shuts down. Vacuum reaches better than 500 microns with a pump sized to the chamber. Insulation is three inches and the window is dual-layer tempered glass. Two year warranty, UL and CSA listed, with lifetime US support.
Key Features
- Heated shelves: Three aluminium shelves at 500W each, with in-shelf sensors
- Chamber: An 18 x 18 x 18 in stainless cube, 3.2 cubic feet
- Shelf area: 17.5 x 17.25 in per shelf, 20 lb load each
- Stackable option: Adds three shelves and halves spacing to 2.25 in
- Temperature: Ambient to 480 F, accuracy within 1 F of setpoint
- Vacuum: Better than 500 microns through all stainless tubing
- Gauge: Oil-filled mechanical, reading 0 to 30 in of mercury
- Break-in: Run at 400 F without vacuum for 15 minutes before first use
- Warranty: Two years with lifetime US-based parts and service support
Technical Specifications
| Specification | Value |
|---|---|
| Model | AT32 series |
| Chamber capacity | 3.2 cu ft |
| Chamber size | 18 x 18 x 18 in |
| Chamber material | Stainless steel |
| Heating | 3 heated aluminium shelves, 500 W each |
| Shelf size | 17.5 x 17.25 in |
| Shelf spacing | 4.75 in; 2.25 in with optional stackable shelves |
| Shelf load | 20 lb per shelf |
| Shelf area | 906 sq in; 1,812 sq in with stackable shelves |
| Temperature range | Ambient to 480 F (250 C) |
| Accuracy | Within 1 F |
| Uniformity | Within 5% of setpoint |
| Warm-up to 100 F | 35 minutes |
| Warm-up to 480 F | 60 minutes |
| Timer | 1 to 9,999 minutes |
| Electrical | 110V 13.6A or 220V 6.8A, 1,500 W |
| Ultimate vacuum | Better than 500 microns |
| Vacuum gauge | Oil-filled mechanical, 0 to 30 in mercury |
| Vacuum port | KF25 flange x 1 |
| Tubing and valves | All stainless steel |
| Window | Dual layer, 1/2 in tempered safety glass |
| Insulation | 3 in |
| Door gasket | Silicone |
| In-door light | White LED |
| Unit dimensions | 30.5 x 24 x 29 in |
| Unit weight | 260 lb |
| Shipping weight | 400 lb |
| Certifications | UL/CSA E482564, CE |
| Warranty | 2 years |
| Standard package | Oven, 2 KF25 clamp sets, inlet filter, LED cable, manual |