Orders placed after 4pm on weekdays will not ship until the next business day. Orders placed after 12pm Fridays will not ship until the following Monday.
Faster shipping methods may be available; just upgrade during checkout.
*Some exclusions apply.
Enter new zip code to refresh estimated delivery time.
The 131-LED-MS Compound Microscope with Mechanical Stage from National Optical is a three-objective inclined microscope designed for middle school and high school students. Achromatic DIN optics minimize image distortions and deliver consistent views on all three magnification settings. The objectives are also parfocalled and parcentered, keeping the specimen in focus and centered in the field of view when the magnification is changed. This microscope was built for reliable performance and is backed by the manufacturer's lifetime warranty.
A user-friendly design complements the range of features that make the 131 series microscope a welcome addition to classrooms. A 360° rotating monocular viewing head enables the eyepiece to be shared with multiple viewers without having to move the microscope. This configuration of the 131 has an individual focus dial for fine and coarse adjustments. The focus system also includes a slip clutch and rack stop that prevents mishandling by novice users. The 131-LED-MS also features a battery-powered cool LED substage illuminator and graduated mechanical stage. National Optical engineered this compound microscope to be durable, portable, and feature-rich enough to help transition high school students to more sophisticated instruments.
45° inclined monocular eyepiece
10x, 18mm eyepiece with revolving pointer
4x,10x,40xR color-coded DIN objectives
40x,100x, 400x magnification
Rotating objective turret with click stops
Achromatic, parfocalled, parcentered objectives
360° rotating head for easier eyepiece sharing
Separate fine and coarse focusing knobs
Rack-and-pinion focus system
Slip clutch prevents over-turning
Tension adjustment prevents focus drift
Rack stop prevents damage to slides and protects lenses
LED illuminator (20 Watt equivalent)
0.65 condenser lens
5-hole disc diaphragm
Cordless LED illuminator
Up to 150 hours or runtime on 3 standard AA batteries
Graduated mechanical stage
Cast metal body with inclination joint
Grey enamel finish
14" (36cm) height
6.8 lb (3.1 kg) weight
In the Box
National 131-LED-MS Compound Microscope with Mechanical Stage
Lifetime Limited Warranty (Excluding Bulb and Batteries)
Table of Contents
45° inclined monocular
10.0x (18 mm) with revolving pointer
DIN 4.0x (0.10 NA), 10.0x (0.25 NA), 40.0xR (0.65 NA)
Low position coarse and fine focus
LED illuminator (20 Watt tungsten equivalent)
(3) AA alkaline batteries
Up to 150 hours
3.5 x 3.25" (8.9 x 8.3 cm)
(3) AA alkaline batteries
14" (36 cm)
6.8 lb (3.1 kg)
National 131-LED-MS Compound Microscope with Mechanical Stage Review