公开(公告)号：US10481064B2

公开(公告)日：2019-11-19

申请号：US15755782

申请日：2016-08-10

Applicant: CHELSEA TECHNOLOGIES GROUP LTD

Inventor： Kevin Oxborough ,  John Attridge ,  David Andrewes

IPC: G01N1/00 ,  G01N15/06 ,  G01N21/64 ,  B63J4/00 ,  C02F1/00 ,  G01N33/18 ,  G01N1/38 ,  G01N21/63 ,  C02F103/00 ,  G01N1/20

Abstract: A ballast water monitoring device and a method for detecting live phytoplankton are disclosed. The device comprises a chamber for receiving a sample, at least one light source to emit light towards the sample, a light detector to receive light from the sample and generate a light signal, and a controller. The controller is configured to control the at least one light source to emit a single pulse of light, calculate the variable fluorescence [Fv] of the sample in response to the pulse of light, at time intervals less than the duration of the pulse of light, compare the calculated variable fluorescence to a predetermined reference limit, and perform an action if the calculated variable fluorescence is greater than the predetermined reference limit.