{"id":808,"date":"2023-08-14T08:37:08","date_gmt":"2023-08-14T12:37:08","guid":{"rendered":"https:\/\/wpstaging.whoi.edu\/site\/deeptow\/?page_id=808"},"modified":"2023-10-25T15:34:04","modified_gmt":"2023-10-25T19:34:04","slug":"rov-jason-magnetometer","status":"publish","type":"page","link":"https:\/\/website.whoi.edu\/deeptow\/facilities\/rov-jason-magnetometer\/","title":{"rendered":"ROV JASON Magnetometer"},"content":{"rendered":"\n\n\t

ROV JASON Magnetometer<\/h1>\n\t

A small fully digital 3-axis magnetoresistor magnetometer (Honeywell HMR2300) is now part of the\u00a0National Deep Submergence Facility<\/a>\u00a0(NDSF) equipment roster for\u00a0Remotely-Operated Vehicle (ROV) Jason<\/a>.\u00a0\u00a0The sensor is approximately 8 inches long 3 inches diameter in a titanium pressure housing rated to 6000 meters depth. The sensor communicates via an RS232 protocol to the datalogging system of the NDSF and other Deep Submergence Lab vehicles.<\/p>\nHow the sensor works<\/strong>
\nThe magnetic sensing device is built upon the phenomenon of\u00a0magneto-resistance.<\/a>\u00a0The sensing material changes its electrical resistance depending on the strength of the ambient magnetic field. The Honeywell sensors use a property called\u00a0anisotropic magnetoresistance (AMR).\u00a0In AMR sensors the electrical resistance varies according to the angle between the direction of electrical current and that of the magnetic field. Electical resistance has a maximum value when the current is in the same direction as the applied magnetic field. Magnetoresistive sensors are typically made of a nickel-iron (Permalloy) thin film deposited on a silicon wafer and patterned as a resistive strip.\n\nDr. Maurice Tivey
\nmtivey@whoi.edu<\/a>\n\t\t\t\t\n\t\t\t\t\"ROV\n\t\t\t\t<\/a>\n\t\tROV Jason Marine magnetometer. Photo Credit: Maurice Tivey, WHOI.\n\t\t\t\t\n\t\t\t\t\"ROV\n\t\t\t\t<\/a>\n\t\tROV Jason with magnetometer mounted on top light bar to port side. Photo Credit: Maurice Tivey, WHOI.\n\n","protected":false},"excerpt":{"rendered":"

ROV JASON Magnetometer A small fully digital 3-axis magnetoresistor magnetometer (Honeywell HMR2300) is now part of the\u00a0National Deep Submergence Facility\u00a0(NDSF) equipment roster for\u00a0Remotely-Operated Vehicle (ROV) Jason.\u00a0\u00a0The sensor is approximately 8 inches long 3 inches diameter in a titanium pressure housing rated to 6000 meters depth. The sensor communicates via an RS232 protocol to the datalogging…<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":305,"menu_order":3,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_relevanssi_hide_post":"","_relevanssi_hide_content":"","_relevanssi_pin_for_all":"","_relevanssi_pin_keywords":"","_relevanssi_unpin_keywords":"","_relevanssi_related_keywords":"","_relevanssi_related_include_ids":"","_relevanssi_related_exclude_ids":"","_relevanssi_related_no_append":"","_relevanssi_related_not_related":"","_relevanssi_related_posts":"","_relevanssi_noindex_reason":""},"_links":{"self":[{"href":"https:\/\/website.whoi.edu\/deeptow\/wp-json\/wp\/v2\/pages\/808"}],"collection":[{"href":"https:\/\/website.whoi.edu\/deeptow\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/website.whoi.edu\/deeptow\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/website.whoi.edu\/deeptow\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/website.whoi.edu\/deeptow\/wp-json\/wp\/v2\/comments?post=808"}],"version-history":[{"count":2,"href":"https:\/\/website.whoi.edu\/deeptow\/wp-json\/wp\/v2\/pages\/808\/revisions"}],"predecessor-version":[{"id":812,"href":"https:\/\/website.whoi.edu\/deeptow\/wp-json\/wp\/v2\/pages\/808\/revisions\/812"}],"up":[{"embeddable":true,"href":"https:\/\/website.whoi.edu\/deeptow\/wp-json\/wp\/v2\/pages\/305"}],"wp:attachment":[{"href":"https:\/\/website.whoi.edu\/deeptow\/wp-json\/wp\/v2\/media?parent=808"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}