National Optical Model 131-SPMS Compound Microscope (up to high school instruction)

National Optical Model 131-SPMS Compound Microscope (up to high school instruction)

National Optical Model 131-SPMS Compound Microscope (up to high school instruction)
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Model 131-SPMS
The microscope model that sets the standard for high school instruction. 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.
OPTICAL SYSTEM
Widefield 10x eyepiece with revolving pointer. Accepts optional #965-160 eyepiece reticle.
Monocular 45 degree inclined viewing head rotates 360 degree for easy repositioning of eyepiece and sharing by more than one student.
DIN 4x, 10x, 40xR and 100xR objectives are achromatic, parfocalled, parcentered, color coded.
4-hole nosepiece is ball-bearing mounted for more precise alignment, has positive click stops.
ILLUMINATION
115v 20-watt tungsten illumination, condenser and blue filter, base-mounted on/off switch, heavy duty 3-wire cord.
FOCUSING
Low position coarse and fine focusing controls.
Stage moves up or down, eyepiece and body remain fixed.
Slip clutch prevents damage to focusing system.
Tension adjustment eliminates stage drift.
Safety rack stop prevents damage to slides and objective lenses.
STAGE
Large 120mm x 120mm (4-3/4 in. x 4-3/4 in.) stage, with professional quality, low profile mechanical specimen holder with low-position coaxial x-y controls.
Built-in 1.25 N.A. Abbe condenser with iris diaphragm.
FRAME
Rugged cast metal, gray enamel finish.
Base dimensions: 133mm x 175mm (5-1/4 in. x 7 in.)
Height: 360mm (14-1/8 in.)
With instruction brochure and vinyl dustcover
WARRANTY
Lifetime limited warranty, excluding bulb, cord, and accessory mechanical stage.


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