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Description


The Unico M251 Monocular Microscope is designed for College Level Instruction and Discovery. The versatile M250 Series offers your choice of Halogen or LED Illuminated Models.

Warranty: 5 Year Limited Warranty (1 Year Electrical System Warranty; excludes Bulbs & Fuses).

The M250 Series Microscopes have been recently updated with the Reverse Nosepiece, Larger Base and Sturdier Body Construction adding more value for your money.

Your choice of Monocular, Dual-view, or Seidentopf Binocular Heads in corded or cordless models. All heads rotate 360ç. Binocular Heads have Diopter Control on One Eye-Tube and Interpupillary Distance Adjustment Settings (55-75mm).

Standard M250 Series features include Color Coded DIN Achromatic 4, 10, 40 and 100x Objectives and 10x Widefield Eyepieces.

Objectives are mounted on a 4-position, positive click-stop Reverse Nosepiece. All optical surfaces are precisely polished, sealed and coated with anti-fungal, color correction and hardening agents to improve true color viewing while increasing the lifetime of the lenses.

Unico M251 Monocular Microscope Size & Weight:


  • Size: 8.5in x 6.5in x 14.4in.
  • Weight: 13lbs (6kg).
  • Shipping Size: 12.5in x 8.5in x 16.5in.
  • Shipping Weight: 13lbs (6kg).


Unico M251 Monocular Microscope Specifications:


    • Illumination:
    • M251: Halogen (6V, 20W).
    • M251LED: LED.
  • Head: Monocular.
  • Eyepiece: 10x WF.
  • Objectives: 4x, 10x, 40x, 100x.
  • Condenser: NA 1.25.
  • Diaphragm: Iris.
  • Stage: Mechanical.
  • Focusing: Coaxial.


Unico M251 Monocular Microscope Literature:


Unico Basic Laboratory Microscopes Brochure Unico M250 & M280 Basic Lab Microscopes Brochure

Frequently asked questions

Does the microscope include a widefield eyepiece?

Yes, the Unico M251 Monocular Microscope comes equipped with a 10x Widefield (WF) eyepiece. This feature is designed to provide a broad field of view, enhancing your observation and discovery experience.

Is a reverse nosepiece included?

Yes, the Unico M251 features a specialized 4-position, positive click-stop reverse nosepiece.

This updated reverse design is a key feature that enhances usability and durability by:

  • Facilitating easier access and manipulation of the objective lenses.
  • Ensuring the objectives are securely positioned via the positive click-stop mechanism.
Does this microscope include precise focusing controls?

Yes, the Unico M251 is engineered with several features to ensure precise and smooth focusing and accurate specimen control:

  • Coaxial Focusing: The focusing system utilizes coaxial knobs, combining coarse and fine adjustments. This allows for quick initial focusing followed by the highly detailed, sharp movements necessary for critical observation.
  • Focus Tension Control: A tension adjustment knob is included, allowing users to customize the stiffness or drag of the focus mechanism. This prevents focus drift and ensures controlled, personalized movement.
  • Mechanical Stage: The unit includes a reliable mechanical stage, which aids in the accurate and precise positioning of slides under the objectives.
Does the microscope offer versatile illumination choices?

Yes, the Unico M251 offers versatile illumination choices, allowing you to select the light source that best fits your environment and needs:

  • Halogen Illumination (6V, 20W): This is the traditional option, providing powerful lighting suitable for standard laboratory work.
  • LED Illumination: This modern option is highly energy-efficient, operates cooler, and provides a bright, long-lasting light source, which minimizes maintenance and reduces operational costs over time.
What high-quality objectives are included?

The Unico M251 is equipped with a set of four high-quality Color Coded DIN Achromatic Objectives designed for superior clarity and true color viewing.

Key features and specifications:

  • Magnifications: 4x, 10x, 40x, and 100x (the 100x objective is typically used with immersion oil).
  • Objective Mounting: These objectives are mounted on an updated 4-position, positive click-stop Reverse Nosepiece. This reverse configuration provides enhanced clearance above the mechanical stage, simplifying specimen handling.
  • Optical Treatment: All optical surfaces are precision polished, sealed, and treated with specialized coatings, including anti-fungal, color correction, and hardening agents. This ensures long-term durability and accurate true-color viewing.
Does the microscope have a comprehensive mechanical stage?

Yes, the Unico M251 is equipped with a Mechanical Stage for accurate and precise specimen positioning, which is crucial for educational and discovery applications.

This robust system works in conjunction with the following high-precision controls:

  • Coaxial Focusing: Provides combined coarse and fine adjustment knobs for superior precision. A dedicated tension control knob is also included, allowing users to customize the focus feel and prevent drift.
  • Condenser and Diaphragm: The viewing system utilizes an NA 1.25 Condenser and an Iris Diaphragm for excellent control over light intensity and specimen contrast.
What is the warranty period for the Unico M251 Monocular Microscope?

The Unico M251 Monocular Microscope is backed by a comprehensive warranty to ensure its longevity and value in educational settings. The coverage is as follows:

  • 5-Year Limited Warranty on the overall microscope body and components.
  • The Electrical System is covered by a specific 1-Year Warranty.

Please note that the warranty explicitly excludes consumable items like bulbs and fuses.

Is this microscope designed for rigorous college-level instruction?

Yes, the Unico M251 Monocular Microscope is specifically engineered for college-level instruction and scientific discovery.

It is built to withstand frequent use in demanding educational environments, featuring:

  • Sturdy Construction: The updated physical design includes a sturdier body construction and a larger base for enhanced durability and stability.
  • High-Quality Optics: It utilizes coated DIN Achromatic Objectives (4x, 10x, 40x, 100x) and a 10x Widefield Eyepiece, ensuring clear, true color viewing and supporting magnification up to 1000x.
  • Precision Control: Includes a Mechanical Stage for accurate specimen positioning and precise Coaxial Focusing controls.
Are the lenses treated to prevent fungus or enhance their durability?

All optical surfaces of the Unico M251 are precisely polished, sealed, and coated with anti-fungal, color correction, and hardening agents. This treatment enhances the lifetime and performance of the lenses.

Does the microscope have a condenser and diaphragm?

The Unico M251 includes a NA 1.25 condenser and an iris diaphragm. These components work together to provide optimal light control for enhanced viewing.