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

Detailed Product Description:

1, It employs precise optical structure, the line of light is very clear and precise measurement.

The measurement results are displayed digitally,and the left eye and right eye measuring values are displayed separately.

2, Simple and rapid measuring operation, and free operation of the direct PD adjustment lever are possible.

Combining with the adjustable viewing distance selecting lever for measuring all kind of the viewing distances, the PD measurement is simple and precise.

3, When the measuring operation is finished, the auto power off and memory function,enable to save the power and not to lose the data.

4, It can also be used in monocular the left eye and right eye separately.

It is an ideal digital precision optical meter for measuring distance between human pupils in the process of optometry.

It is designed in a scientific and reasonable way, integrating technologies on optics and microelectronics. It has the most exactitude configuration, measuring more correctly.

It also has the focusing button for distance converting.

The pupil distance is measured by making the papillary light point and measuring light in direct line, in the way of monocular eye or binocular eyes.

Specifications:

Effective Range of Measurement: Binocular papillary distance: 45 ~ 82 mm

Left or right papillary distance: 22.5 ~ 41 mm

Indication Error: ≤ 0.5 mm

Rounding Error: ≤ 0.5 mm

Absolute value of the asymmetry error: ≤0.5mm

Distance of Target: 30 cm ~ ∞

Power Supply: DC 1.5 V; 1 x 5# AA Battery (Battery is not included.)

Time for Automatic Shut-off: About one minute after stopping operation

Dimension: 221 x 167x 62 mm

Weight: 0.8 kg