IMO now considers Halogen Systems Inc. Amperometric Chlorine Sensor as an equivalent to DPD on Ballast Water Treatment Systems We have huge news for Halogen Systems Inc. Ballast Water Management System manufacturers can now substitute Halogen amperometric sensors without repeating the complete FA testing. Contact your IL for details. We thank RWO GmbH and the GESAMP Ballast Water Working Group members for their efforts on our behalf. Both US Coast