Model 138-SPMS | National Optical

Compound Microscopes

138-SPMS

Suggested Retail Price

$ 379.00

Microscope Diagram

Model 138-SPMS

Our most popular series for middle and high school instruction is enhanced with fluorescent illumination. Delivers higher light efficiency than standard 20 watt tungsten bulb, and cool operating temperature prolongs specimen life when viewing live material. Same precision optical and mechanical features as our best selling 130 series. Combines extra rugged construction with user-friendly features.

OPTICAL SYSTEM

Widefield 10x eyepiece with revolving pointer. Accepts optional #965-160 eyepiece reticle.
45° inclined viewing head rotates 360° for easy sharing by more than one student, or for reverse position viewing.
DIN standard, achromatic, parfocalled, parcentered, and color-corded: 4x (0.10 N.A.), 10x (0.25 N.A.), 40xR (0.65 N.A.) and 100xR (1.25 N.A.) objectives.
4-hole nosepiece is ball-bearing mounted for more precise alignment, has positive click stops.

ILLUMINATION

Built-in fluorescent illumination with 5-watt bulb, delivers greater light and longer life than standard tungsten bulbs. Virtually heat free operation.
Base mounted on/off switch, heavy-duty 3-wire cord.

FOCUSING

Separate low position coarse and fine focusing controls.
Stage moves up or down, eyepiece and body remain fixed.
Coarse focusing has slip clutch to prevent 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.
Height: 365mm (14-1/2 in.). Net wt. 3.4 kgs (7.4 lbs).

PACKING

Molded styrofoam container with instruction brochure and vinyl dustcover.
Individual: Ship wt. 5 kgs (11 lbs), Dimensions 550x325x325mm (22x13x13 in.)
Master carton pack 4 each: Ship wt. 19.1 kgs (42 lbs), Dimensions 775x325x475mm (31x13x19 in.)

WARRANTY

Lifetime limited warranty, excluding bulb, cord, and accessory mechanical stage.

Available Parts & Accessories

610-045	WF10x eyepiece w/pointer
610-045R	WF10x eyepiece w/reticle, 10mm/100 div.
615-045	WF15x eyepiece w/pointer
704-045	DIN 4x objective 0.10 N.A.
710-045	DIN 10x objective 0.25 N.A.
740-045	DIN 40xR objective 0.65 N.A.
760-045	DIN 60xR objective lens, N.A. 0.90
799-045	DIN 100xR objective 1.25 N.A.
800-102	Replacement bulb, 115v 20 watt tungsten, D.C. medium bayonet base
800-102-220	Replacement bulb, 220v 20 watt tungsten, D.C. medium bayonet base
800-138	Replacement bulb, 5 watt fluorescent, for Model 138/139 series microscopes can be used in 110v or 230v version of this series.
801-025	Replacement fuse 0.25 amp, for 131 220v only
910	Graduated mechanical stage, top mounted adjustment knobs
920	Abbe condenser, N.A. 1.25, spiral type, with iris diaphragm
925	Iris diaphragm
930-023	Video adaptor tube, 23.3mm O.D. (fits inside standard compound microscope eyepiece tube, for use without eyepiece.
930-028	Video adaptor, over-the-eyepiece type, includes adaptor rings to fit both 28mm O.D. compound and up to 34mm O.D. stereo eyepieces
935	Pointer for compound microscopes, spring type
951	Dustcover, 16" tall x 13", heavy vinyl with stitched seams
965-160	Eyepiece reticle, 10mm/100 Div., 19mm diameter, 1.28mm thick
970-131	Stage clip, spring activated, supplied with M3 x 0.5x x14 mounting screw. Each
975-001	Carrying case, anodized aluminum, fabric lining, accessory pockets, Velcro straps, keyed lock. Interior dimensions: 14-7/8 x 7-3/4 x 10-1/2 inches. Fits all of above, except dual head models.
975-002	Carrying case, anodized aluminum, fabric lining, accessory pockets, Velcro straps, keyed lock. Interior dimensions: 17-1/4 x 8 x 11-3/4 inches. Fits dual head models.
975-138	Carrying case,heavy plastic w\foam liner.Fits all above, except dual head models.