Liquid Volume Calibration: When measuring small volumes of liquid (e.g., 1-10 mL), watch glasses can be used to magnify the scale. This allows for clear alignment of the lowest point of the meniscus with the scale, reducing reading errors (especially useful for high-precision experiments)
Optical Performance: High light transmittance (90%-95%) ensures clear visibility of the scale even after magnification, preventing reading errors caused by blurring of the lens. Single-convex lenses offer a simpler structure and better edges distortion control than biconvex or aspheric lenses, making them ideal for observing linear scales
Compatible sizes and specifications: Watch glass replacements can be selected based on your needs, offering a wide range of applications and practicality. They can be used as laboratory measuring cup covers or watch lens accessories. Their ample capacity and magnification (26-33mm field of view diameter) aid in observing small particles or sediment within the measuring cup
Parameter Matching: Ensure the diameter of the watch glass flat beaker cover matches the diameter of the measuring cup (e.g., a 50mm lens fits a 50mL measuring cup). Chemically strengthened mineral glass offers higher compressive strength than ordinary glass and can withstand impacts on laboratory surfaces. Keep the lens dry during long-term storage
Glass Material: The watch glass lens is made of mineral glass,highly impact-resistanting.Convex surfaces and flat back provide excellent magnification. The watch glass beaker cover is compact, convenient, and scratch-resistanting. Use lens tissue or a microfiber cloth to clean watch glass to prevent scratches
Item Type: Watch Glass Lens
Material: Mineral glass
Uses: Laboratory measuring cup cover, watch lens accessories
Diameter Range: Approx. 26 ~ 33mm / 1 ~ 1.3in
Quantity: 15 Pieces(toal 30Pcs)
Package List：
30 x Watch Glass Lens