| 301 is for desk use with O-5D of measurement range, and digital type with high accuracy. Employment of light source from the device itself, press Push button for O setting and no need of warming-up, includes measurement lens 1,2,3mm  |
| Measuring Range | 0 to 5.0D with 2 and 3mm apertures |
| 0 to 4.0D with 1mm aperture | |
| Accuracy ± 0.02D | |
| Repeatance | Accuracy ± 0.01D |
| Operating Temperature | 10˚C to 40˚C |
| Size | Height 5.25 inches (13.3cm) |
| Width 10.25 inches (26.0cm) | |
| Length 15.0 inches (38.0cm) | |
| Weight | 8.5 lbs. (3.9kg) |
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