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The ISIIS-DPI T424 was developed to quickly resolve large phytoplankton chains, such as diatoms, that are difficult to classify in standard in situ imagery. It provides essential phytoplankton context to help interpret zooplankton distributions and grazing dynamics. Simple, rugged, and fast, the T424 complements ISIIS-DPI plankton imagers by turning ambiguous features into meaningful biological categories—directly in the field.
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In conventional ISIIS-DPI P-series images, phytoplankton chains often appear only as dots or short line segments; the T424 was designed to resolve these features and support identification of phytoplankton structure in situ.
With a magnification of 0.424 (from which its name is derived), the T424 images a compact volume of approximately 18.3 × 18.3 mm with a ~3 mm depth of field, prioritizing optical simplicity and rapid image acquisition over volumetric sampling. This focused geometry enables fast turnaround from acquisition to interpretation.
For high-speed towing, illumination must be carefully managed. At typical tow speeds, acceptable exposure times fall in the sub-microsecond range to limit motion blur. When properly illuminated, the T424 delivers crisp, high-contrast images using a robust and stable optical configuration.
With a depth rating of 1,000m, The T424 provides a rugged, complementary solution well suited for deployment alongside ISIIS-DPI systems where rapid phytoplankton context is needed to support and interpret zooplankton observations.
| Standard field of view & depth of field: | FOV: 18.3mm x 18.3mm & DOF: 3.5mm |
| Volume of water imaged per frame: | 1.1mL |
| Pixel resolution: | 8.5µm/pixel |
| Recommended for particles: | >50µm |
| Camera: | 5MP, 20fps, GigE, Global Shutter, 3.45µm pixel size, 2/3″ sensor, C-mount |
| Power: | 12V 6 Watts |
| Dimensions with rail & brackets: | L 598mm x W 132mm x H 130mm |
| Depth rating: | 1,000m (aluminum) |
| Weights: | in air: 5.5Kg | in water: 3.5Kg |
| Connectors: | MCBH8M-CAT, MCBH2M-Power, MCBH2M-Power |
