Import Biological Microscope — Buy in wholesale FOB from Supplier in China

The SW-200i biological microscope from Beijing PDV Instrument Co., Ltd. is built around an infinity-corrected achromatic optical system, a design that places the tube lens at infinity so intermediate optical elements such as filters or beamsplitters can be inserted without changing focal plane position. The viewing head options include a 30-degree gemel binocular and a 30-degree gemel trinocular, both with 360-degree rotatable eyepiece tubes and an interpupillary distance adjustable from 50 mm to 75 mm. The trinocular variant provides a fixed spectroscopic ratio of 80:20 for imaging versus visual observation, suiting documentation needs. PL10X/20T high eye-point wide-field plan eyepieces deliver a 20 mm field of view with 19 mm effective exit pupil distance and plus-minus 5 diopter adjustment, reducing eye strain for spectacle wearers and extended use.

The infinity plan achromatic objectives cover 4x, 10x, 20x, 40x, and 100x magnifications, with the reversed quadruple nosepiece allowing quick access and reduced risk of objective collision with the slide. Focusing relies on an all-metal high-pressure die-cast body with precision pinion-and-rack transmission, offering 30 mm coarse focus travel with tension adjustment and a lower limit stop, plus fine focus resolution of 0.002 mm. The 150 mm by 140 mm mechanical stage moves 76 mm by 50 mm with 0.1 mm precision and includes damping clips for slide stability. Illumination options span a 3W LED with continuous intensity adjustment and a 6V/30W halogen system, both centred and operating on 100V-240V AC 50/60Hz, with the condenser being a N.A. 1.25 Koehler illuminator that accepts phase contrast and dark-field accessories.

Fluorescence capability is modular, with LED modules for UV2 (365 nm central wavelength), B4 for tuberculosis diagnosis (455 nm), B1 band-pass (470 nm), and G1 band-pass (560 nm), each featuring independent intensity knobs and bright-field/fluorescence switching. Additional LED modules can be customised for clinical diagnostic requirements. Optional accessories include dark-field, phase contrast, and polariser/analyser sets, plus video adapters at 1x, 0.5x, and 0.35x CTV magnification with C-mount and relay lens compatibility. This instrument targets clinical laboratories, research institutions, and pathology departments requiring bright-field, fluorescence, and potential contrast-enhanced imaging in a single platform. Buyers should confirm which illumination and fluorescence modules are included in the quoted configuration, as the extensive option list implies a configurable rather than standard package.

Beijing PDV Instrument Co., Ltd. operates from Room 1601, Building 2, No. 108 Zhichun Road in the Haidian District of Beijing, China, placing it within the city's technology and research corridor. The company carries a harbour trust tier with a 0.00 response rate and zero recorded average response hours, indicating limited or no recent transactional activity through this channel. No verification of factory ownership, ISO certification, or specific quality management systems is present in the source data. The detailed product specification suggests either direct manufacturing or close OEM partnership, given the depth of optical and mechanical technical data provided.

The SW-200i model represents a configurable platform rather than a single fixed specification, with multiple illumination, fluorescence, and optical accessory options that imply a product line aimed at institutional and clinical procurement. Buyers should note that Beijing PDV Instrument's location in Beijing, rather than a coastal manufacturing province, may affect logistics and export handling, though the capital's infrastructure supports freight forwarding. The absence of response history means that initial contact should include technical questions to gauge expertise and responsiveness before committing to an order. The supplier profile does not state years in business, employee count, or annual turnover, so these should be requested directly if relevant to vendor qualification procedures.