LY-9G PD Meter

A digital precision optical instrument used to measure the distance between human pupils and pupil height in the process of an Fill a prescription.

Detailed product description:
1. the instrument adopts the precise optical structure, the optical path is clear, the measurement is accurate, the measurement data digital display, and the left and right display respectively.
2. the operation is simple and the measurement speed is fast. And with the adjustable distance knob, suitable for different measured the distance of the distance, so that the measurement distance of the distanceTo be simple and accurate.
3. after the measurement is completed with memory function, the data will not be lost.
4. measurement of left or right unilateral.

Parameter
Effective measurement range: binocular distance: 46 - 82 mm, left and right distance: 23 - 41 mm
Indication error: ≤ 0.5 mm
Target distance: 30 cm to ∞
Voltage: DC 3v ( 2 aa battery )
Net weight: 0.7 kg
Inner box size: 28 ( l ) x 19 ( w ) x 10 ( h ) cm