Olympus CX31 Binocular Biological Microscope UIS2 Infinity Optics 4x-100x Used

The Olympus CX31 (Model CX31RBSFA) is a highly dependable compound microscope tailored for rigorous daily use in clinical, educational, and medical laboratory settings. Built around Olympus’s renowned UIS2 (Universal Infinity System) optics, this unit delivers bright, high-contrast images and excellent field flatness. The integrated halogen illumination system provides strong, consistent light with an easy-to-use intensity control dial, ensuring optimal viewing across all magnifications. Featuring a comfortable Siedentopf binocular head and a smooth, right-hand wire-driven mechanical stage, the CX31 offers superior reliability and ergonomic comfort for prolonged laboratory sessions.

Condition Used/Inspected. Please note: This microscope is a used item. It has been thoroughly inspected and tested to confirm full mechanical and electrical functionality. The coaxial coarse and fine focusing controls, as well as the mechanical stage, operate smoothly without catching. The halogen illumination system powers on reliably and responds accurately to the intensity dial. Cosmetically, the unit is in very good condition, displaying only standard, minor signs of prior laboratory wear as shown in the photographs.

Important Note on Optics: The included objectives have been visually verified and are clear of scratches or fungal growth. Please note that this unit features a mixed objective set, utilizing a high-quality Labomed EP Semi Plan lens for the 40x magnification alongside the standard Olympus objectives.

Specifications

• Model: Olympus CX31 (CX31RBSFA)
• Serial Number: 4C04349
• Optical System: UIS2 Infinity optical system (∞)
• Observation Tube: Siedentopf binocular tube
• Illumination: Built-in transmitted halogen illumination system (100-120/220-240V~ 50/60Hz) with intensity control dial
• Focusing: Coaxial coarse and fine focus knobs with tension adjustment
• Stage: Right-hand wire-driven mechanical stage
• Condenser: Abbe type condenser with iris diaphragm
• Nosepiece: Fixed quadruple inward-facing nosepiece

Included Objectives & Eyepieces (As Photographed)

• (2) Olympus 10X/18 Eyepieces
• (1) Olympus Objective 4x (Red band)
• (1) Olympus Objective 10x (Yellow band)
• (1) Labomed USA EP Semi Plan Objective 40x / 0.65 ∞ / 0.17
• (1) Olympus PlanC Objective 100x / 1.25 Oil ∞ / -

Included in Box

• Olympus CX31 Microscope Stand (SN: 4C04349)
• Olympus Binocular Head
• (2) Olympus 10X/18 Eyepieces
• (4) Objectives (4x, 10x, Labomed 40x, 100x Oil as detailed above)
• Standard Power Cord