This National Optical-brand model 131 microscope is designed to meet or exceed high school teaching requirements, is ruggedly built, and includes all the teaching essentials plus popular “student proofing” features. All lab equipment ships to U.S. locations only.

3 in stock


This item is not returnable once opened! This item not eligible for any free shipping or $5 shipping promotions as they occur.

Optical system has DIN widefield 10x eyepiece, locked on, with fully rotatable pointer. Objective lenses are 45mm DIN parfocal, achromatic, color-coded 4x, 10x and 40x, giving you magnifications of 40, 100, and 400 power. Built-in illuminator base has a 115V 20 watt bulb, heavy cord, and light switch. Both coarse-focus and fine-focus knobs are included. The slip clutch prevents damage to slides and objective lenses. Large 10mm x 120mm stage is acid- and reagent-resistant. The stage has a built-in condenser lens, and 5-hole disc diaphragm. Stage clips are locked on and spring mounted for ease of use. The microscope is 13.75 inches in height and weighs 7 lbs.; the base is 5 x 7.5 inches. This is a high-quality scope deserving of its popularity!

Additional information

Weight9 lbs
Dimensions17.5 × 12 × 5.5 in

High School

Product Type

Lab Equipment


Biology, Advanced Biology, Marine Biology

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