Description

Uses: PD Meter is a digital precision optical instrument used to measure distance between human pupils in the process of optometry. Characteristics: This device is designed in a scientific and reasonable way, integrating technologies on optics, microelectronics. MAIN TECHNICAL INDEXES 1、Range of data displayï&frac*4;š Binocular pupillary distanceï&frac*4;š*4ï&frac*2;ž*3mm Left or right pupillary distanceï&frac*4;š*2ï&frac*2;ž*1.5mm 2、Effective range of measurementï&frac*4;š Binocular pupillary distanceï&frac*4;š*5ï&frac*2;ž*2mm Left or right pupillary distanceï&frac*4;š*2.5ï&frac*2;ž*1mm 3、Indication errorï&frac*4;š ≤0.5mm 4、Rounding errorï&frac*4;š ≤0.5mm 5、Distance of targetï&frac*4;š *0cmï&frac*2;žâˆž 6、Power sourceï&frac*4;š Voltageï&frac*4;šDC 3V Specificationï&frac*4;šAA battery Quantityï&frac*4;š2 or 4 pieces 7、Time for automatic shut-offï&frac*4;š 1 and a half minute after stopping operation 8、Overall dimensionsï&frac*4;š **9mm(L)×**9mm(W)×*6mm(H) 9、Weightï&frac*4;š 0.*9kg