| Chamber Size | Capacity (Approx.) | ||
| A | 300x225x175mm | (12’’x9’’x7’’) | 14 ltrs |
| B | 450x300x175mm | (18’’x12’’x7’’) | 25 ltrs |
| A | Double bulb low voltage 24V – 50W halogen. 250x250mm |
| B | Double bulb low voltage system with 3 halogen bulbs 24V- 250W. 250x250mm for sheet size mark IV |
| C | Double bulb low voltage system with 2 halogen bulbs 24V – 250W through step-down transformer, writing surface 285x 285mm for A4 sheet |
