Cart 0
National Microscope - 131 Series Monocular

National Microscope - 131 Series Monocular


  • $243.80

Ask a Question

The microscope model that sets the standard for high school instruction, now with cool, long life LED illumination. Includes all the most commonly specified features. Rugged metal construction, locked-on parts. Superior DIN optical system and precision mechanical components assure parfocalled and parcentered optical alignment for sharp, unsurpassed viewing. Recommended for instruction through grade 12. Lead time: stock to 14 days. (131-CLED pictured)


• Widefield 10x eyepiece with revolving pointer. Accepts optional #965-160 eyepiece reticle. 

• 45° inclined monocular viewing head rotates 360° for easy sharing by more than one student.

• DIN standard 4x (0.10 N.A.), 10x (0.25 N.A.) and 40xR (0.65 N.A.) objectives are supplied for 40x, 100x and 400x magnification. All are achromatic, parfocalled, parcentered and color-coded.

• 3-hole objective turret, ball-bearing mounted for smooth, precise changes in magnification.


• Low position coarse and fine focusing controls.

• Slip clutch prevents damage from over focusing.

• Tension adjustment eliminates stage drift.

• Safety rack stop prevents damage to slides and objective lenses.


• Cool running LED light rated up to 50,000 hours of use.

• Base mounted on/off switch, heavy-duty 3-wire cord.

• Convenient “grabber” clip on plug lets you wrap the cord around microscope and secure in place by pushing cord into clip for easy storage. No bulky cord hanger needed.


• Limited lifetime warranty, excluding LED, fuse, cord and mechanical stage.


• Individual: Ship wt. 10 lbs (4.5 kgs), Dimensions 22x13x13 in. (550x325x325mm)

• Master carton pack 5 each: Ship wt. 43 lbs (19.5 kgs), Dimensions 35x12x18 in. (875x300x450mm)


Eyepiece: 10x, 18mm with pointer

Head: 45° inclined monocular viewing head, rotates 360°

Nosepiece: 3-hole, click stop, ball-bearing mounted

Objectives: DIN, achromat, 4x (0.10 N.A.), 10x (0.25 N.A.) and 40xR (0.65 N.A.)

Stage: 110mm x 120mm (4-3/8 in. x 4-3/4 in.) stage, with locked-on spring mounted stage clips, drilled and tapped to accept optional mechanical stage.

Condenser: Built-in 0.65 N.A. condenser lens, calibrated 5-hole disc diaphragm

Focusing: Separate coarse and fine controls with tension adjustment and slip clutch

Illumination: LED Electrical Input 110 Volts Height/ Weight 14 1/8 in. (360mm)/ 6.8 lbs (3.1 kgs)

Authorized Distributor Parts and Accessories: #800-001 Replacement LED bulb, #910 Graduated mechanical stage, #965-160 Eyepiece reticle, 10mm/100 div


    We Also Recommend

    Questions & Answers

    Have a Question?

    Be the first to ask a question about this.

    Ask a Question