Usages:

PD Meter is a digital precision optical instrument used to measure distance between human pupils in the process of optometry.

Features:

This device is designed in a scientific and reasonable way, integrating technologies on optics, microelectronics.

Specifications:

• Range of data display: Binocular pupillary distance: 44～83mm
                                   Left or right pupillary distance: 22～41.5mm
• Effective range of measurement: Binocular pupillary distance: 45～82mm
                                                 Left or right pupillary distance: 22.5～41mm
• Indication error: ≤0.5mm
• Rounding error: ≤0.5 mm
• Distance of target: 30cm～∞
• Power source: Voltage: DC 3V
• Specification: 5# AA battery, Quantity: 2 or 4 pieces
• Time for automatic shut-off: 1 and a half minute after stopping operation
• Size: 219d × 169w × 86h mm
• Weight: 0.69kg