National 131 Microscope Series

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.
45° inclined viewing head rotates 360° for easy repositioning of eyepiece and sharing by more than one student.
DIN 4x, 10x, and 40xR, objectives are achromatic, parfocalled, parcentered, and color coded.
3-hole nosepiece is ball-bearing mounted for more precise alignment, and has positive click stops.

ILLUMINATION

LED light rated up to 50,000 hours life, illumination equal to a 20 watt tungsten bulb.
Equipped with 3 AA rechargeable NiMH batteries and auto-cutoff charger with LED charge indicator.
Single 8 hour charge allows up to 50 hours of use.
Variable on/off light control

FOCUSING

Rack & pinion coarse focus with tension adjustment, slip clutch, separate fine focus.
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 110mm x 210 mm stage, with locked-on, spring mounted stage clips, drilled and tapped to accept optional mechanical stage.
Built in 0.65 condenser lens

FRAME

Rugged cast metal, gray enamel finish.
Height 360mm (14-1/8 in.) Net wt. 3.1 kgs (6.8 lbs)

PACKING

Molded styrofoam container with vinyl dustcover
Individual: Ship wt. 4.5 kgs (10 lbs.), Dimensions 550x325x325mm (35x12x18 in.)
Master carton pack 5 each: Ship wt. 19.5 kgs (43 lbs.), Dimensions 875x300x450mm (35x12x18 in.)