3M 1800 BJ2 Portable Overhead Transparency Projector 3000 Lumens AS-IS

3M 1800 BJ2 Portable Overhead Transparency Projector 3000 Lumens AS-IS

The 3M 1800 BJ2 is a portable overhead transparency projector from 3M's Visual System Division, designed for classroom, boardroom, and presentation use. It produces a bright 3000-lumen output through a transmissive Fresnel lens stage with two optical lens elements, and folds compactly for easy transport. This unit powers on and was confirmed in working condition; however, it is missing its top glass (the Fresnel stage cover) and is therefore being sold AS-IS for parts or repair only.

Specifications & What's Included

• Model: 3M 1800 BJ2
• Output: 3,000 lumens
• Stage Size: 10-1/2 x 10-1/2 inches
• Projection Type: Transmissive
• Lens Elements: Two
• Power: 120V AC, 60 Hz, 5.0 A
• Lamp: FLX 410W MAX, 82V (P/N 78-8073-7100-6)
• Features: Hi/Low brightness switch, fold-down projection arm, dual lamp slots for quick changeover
• Includes: One (1) used lamp
• Missing: Top glass (Fresnel stage cover) — unit is AS-IS
• Country of Manufacture: China
• Manufacturer: 3M Visual System Division, Austin, TX

Applications

Overhead transparency projectors like the 3M 1800 series were a classroom and conference room standard from the 1970s through the early 2000s, before LCD and DLP projectors became affordable. They project transparent acetate sheets (transparencies or "overheads") onto a wall or screen by shining a high-intensity lamp through the stage and up through a folding mirror-and-lens arm. The 3M 1800's portable folding design made it a popular choice for educators and presenters who moved between rooms or sites. Today these projectors are still used in some legacy educational, industrial training, and archival settings, and parts units are sought by repair technicians and collectors restoring functional machines. This unit, missing its top glass, is suited for parts harvesting, repair, or use as a donor unit to restore another 1800-series projector.