INS-11031 | External Reading Lensmeter SML-II

The Opti+ INS-11031 SML-II External Reading Lensmeter is a manual optical instrument designed for measuring the vertex power, cylinder axis, and prism characteristics of ophthalmic lenses. Its clear external reading system, wide ±25.00 D measuring range, and included prism compensation unit make it a dependable solution for optical laboratories, eyewear stores, optometry practices, and lens inspection departments. The instrument supports spherical, cylindrical, and prism lens measurements and can also be used to evaluate contact lens power. Its adjustable eyepiece, green illumination system, integrated lens-marking mechanism, and AC or external battery operation provide the accuracy and flexibility required for everyday professional use. Outstanding Features External Reading System The SML-II incorporates an external diopter reading scale that allows the operator to determine lens power clearly and efficiently while observing the target through the adjustable eyepiece. Wide ±25.00 D Measurement Range With a vertex power range from -25.00 D to +25.00 D, the lensmeter can evaluate a broad selection of prescription lenses used in optical dispensing and laboratory applications. Included Prism Compensation Unit The integrated prism compensator expands the prism measurement range to 0–20Δ. This allows accurate evaluation of lenses with higher prism prescriptions that exceed the standard measuring range of conventional manual lensmeters. Precise Cylinder Axis Measurement The instrument measures the cylinder axis from 0° to 180° with 1° scale divisions, supporting accurate verification and alignment of astigmatic prescriptions. Adjustable Eyepiece The eyepiece offers a focusing range from -5 D to +5 D, allowing the operator to obtain a clear target image according to individual visual requirements. Green Illumination System A high-visibility green illumination source provides a clear observation target while helping reduce chromatic interference during lens measurements. Multiple Lens Applications The SML-II can be used to measure spherical lenses, cylindrical lenses, prism lenses, and contact lenses, making it suitable for a variety of lens inspection and verification procedures. Integrated Three-Point Marking System A built-in three-point lens marking mechanism allows the operator to mark the optical center and horizontal reference line for proper lens positioning and frame installation. Lens Diameter Scale The integrated measuring scale supports lenses from 16 to 80 mm in diameter, helping the operator evaluate lens size and positioning directly on the instrument. Adjustable Instrument Angle The viewing angle can be adjusted to provide a more comfortable operating position, helping reduce operator fatigue during repeated measurements. Flexible Power Options The lensmeter supports operation through an AC power adapter and can also operate with an external battery box, providing additional flexibility when a direct electrical connection is unavailable. ✅ The Opti+ INS-11031 SML-II External Reading Lensmeter combines a wide ±25.00 D measuring range, 20Δ prism compensation, precise axis measurement, integrated lens marking, and flexible power options for reliable daily lens verification. Technical Specifications INSTRUMENT DATA Instrument Type Manual external reading lensmeter Model SML-II Reading System External diopter scale with adjustable eyepiece Supported Lens Types Spherical, cylindrical, prism, and contact lenses OPTICAL MEASUREMENT DATA Vertex Power Range -25.00 D to +25.00 D Power Scale Graduation 0.125 D from -5.00 D to +5.00 D 0.25 D outside this range Cylinder Axis Range 0°–180° Cylinder Axis Graduation 1° Prism Measurement Range 0–20Δ with included prism compensator Prism Graduation 1Δ Prism Base Angle 0°–180°, in 1° increments Eyepiece Focusing Range -5 D to +5 D Accepted Lens Diameter 16–80 mm OPERATIONAL FEATURES Prism Compensation Unit Included Illumination Green illumination source Illumination Rating 6 V, 2 A, 12 W Lens Marking Integrated three-point marking system Instrument Inclination Adjustable POWER SUPPLY AC Power Supply AC 110/220 V power adapter Portable Operation External battery box supported PHYSICAL DATA Instrument Dimensions 11 × 5.9 × 17.7 in (28 × 15 × 45 cm) Net Weight Approximately 11 lb (5 kg) Package Dimensions 15 × 8 × 21 in (38 × 20 × 53 cm) Shipping Weight Approximately 13 lb (6 kg) OPERATING ENVIRONMENT Operating Temperature 5°C–35°C Relative Humidity Less than 85% Recommended Environment Clean indoor environment without direct bright light