| Technical Data | ADF-300 | ADF-350 | ADF-400 | ADF-500 |
| Optical Class | 1/1/1/2 | 1/1/1/2 | 1/2/1/2 | 1/2/1/2 |
| Viewing Area | 90 x 35mm | 90 x 35mm | 90 x 42mm | 90 x 42mm |
| Cartridge Size | 110 x90 x9mm | 110x90 x 9mm | 110 x90 x9mm | 110x90 x 9mm |
| Arc Sensor | 2 | 2 | 2 | 2 |
| Light State | DIN 4 | DIN 4 | DIN 4 | DIN 4 |
| Dark State | Variable shade,9-13 | Variable shade,9-13 | Variable shade,9-13 | Variable shade,9-13 |
| Shade Control | External,Variable | External,Variable | External,Variable | External,Variable |
| Power On/Off | Fully Automatic | Fully Automatic | Fully Automatic | Fully Automatic |
| Sensitivity Control | Unadjustable.Auto | Low-High,by infinitely dial knob | Unadjustable.Auto | Low-High,by infinitely dial knob |
| UV/IR Protection | DIN16 | DIN16 | DIN16 | DIN16 |
| Power Supply | Solar cells.Re-chargeable battery No battery change required |
Solar cells.Battery change required 1xCR2032 lithium Bettery |
Solar cells.Re-chargeable battery No battery change required |
Solar cells.Re-chargeable battery No battery change required |
| Switching Time | 1/5000S,from Light to Dark | 1/5000S,from Light to Dark | 1/5000S,from Light to Dark | 1/5000S,from Light to Dark |
| Dark to Light | 0.25-0.45S Auto | 0.1-1 .OS by infintely dial knob | 0.25-0.45S Auto | 0.1-1 .OS by infintely dial knob |
| Low Amperage TIG | ≥35amps(DC),≥35amps(AC) | ≥20amps(DC),≥20amps(AC) | ≥35amps(DC),≥35amps(AC) | ≥10amps(DC),≥10amps(AC) |
| Grinding Function | NO | YES | YES | YES |
| Low Volume Alarm | NO | NO | NO | NO |
| ADF sef-check | NO | NO | NO | NO |
| Operating Tep. | -5℃~+55℃ | -5℃~+55℃ | -5℃~+55℃ | -5℃~+55℃ |
| Storing Tep. | -20℃~+70℃ | -20℃~+70℃ | -20℃~+70℃ | -20℃~+70℃ |
| Warranty | 1 Year | 1 Year | 1 Year | 1 Year |
| Weight | 480g | 480g | 460g | 490g |
| Packing Size | 33 x 23 x 23cm | 33 x 23 x 23cm | 33 x 23 x 23cm | 33 x 23 x 23cm |