• CSIR - Central Salt & Marine Chemicals Research Institute
  • G20
Devices & Sensors

Title of Process/ Know-how/ Product/Design/Equipment

Differential depth water sampler (DDWS) – A device for collecting water to concentrate diversified bacteria at different depths

  • IPR
    IPR Status & Details:
  • US 10,690,569 B2
Application/Uses/Problem being addressed

This is an innovative vertical water sampler which can collect water from different depth without any cross contamination from other layer.

Salient Technical Features including Competing Features/ Impact
  • DDWS is the improved version of Niskin sampler, which is used for vertical water sampling from long past throughout the world.
  • DDWS can dip to the desired depth and from boat with a rope the lid can be open for filling of water.
  • Water filling can be checked from boat by observing the bubble which comes to the surface of water.
  • After filling of water, bubble formation stops and it can be assumed that the sampler is filled with water. After that the lid can be closed from boat by using another rope.
  • Such monitoring process is not available in case of Niskin sampler which go to the desired depth in open condition, which increase the chance of cross contamination from other layer. Further Niskin sampler work based on messenger and therefore in the area where undercurrent is very strong, false operation is very common in case of Niskin sampler.
    • TRL Level & Scale of Development:
    TRL 4

    The product has already been developed. Used extensively during environmental sampling of CSMCRI for last 2 years successfully.

    Business scope & opportunity (in terms of scale, cost, market etc.):

    We are in contact with companies who are involved in coastal/marine sampling.

    Environmental Considerations:

    This instrument is made up of steel or other metal which are heavy and less chance of rusting. During operation no waste products are generated.

    Status of Licensing:
    Not yet licensed
    Status of Commercialization:
    Not applicable
    Major Raw Materials Needed

    Steel or other metal which are heavy and with less chance of rusting

    Major Plant Equipment and Machinery Required

    Engineering firms that manufacture different steel products

    Techno-Economics

    Production cost of unit sampler will be around ₹40000-50000

    Technology Package

    Unit sampler