VISION FIRE & SECURITY PTY LTD Patent applications |
Patent application number | Title | Published |
20130170705 | METHOD OF DETECTING PARTICLES BY DETECTING A VARIATION IN SCATTERED RADIATION - A smoke detecting method which uses a beam of radiation such as a laser ( | 07-04-2013 |
20130013227 | SENSING APPARATUS AND METHOD - A method of detecting one or more blocked sampling holes in a pipe of an aspirated smoke detector system. The method includes ascertaining the base flow of fluid through a particle detector using a flow sensor; monitoring subsequent flow through the particle detector; comparing the subsequent flow with the base flow; and indicating a fault if the difference between the base flow and the subsequent flow exceeds a predetermined threshold. | 01-10-2013 |
20110243389 | METHOD OF DETECTING PARTICLES BY DETECTING A VARIATION IN SCATTERED RADIATION - A smoke detecting method which uses a beam of radiation such as a laser ( | 10-06-2011 |