| Model | SR-KD420 | SR-KD220 | 
| Temperature range | Room temperature +5 - 450 °C | |
| Temperature accuracy | ±1C | |
| Heating method | Infrared heating and high-purity graphite conduction | |
| Heating insulation method | unique air duct insulation technology | |
| Digestion tube capacity | 300mL | |
| Capacity per batch | 20pcs/batch | |
| Power supply | 220 VAC±10% 50HZ | |
| Power | 3600W | |
| Dimensions | 515mmX458mmX730mm | 515mmX421mmX211mm | 
| Net weight | 40Kg | 25Kg | 
 
              