{"product_id":"seco-optical-plummet-twist-focus-tribrach-gray-black-yellow","title":"SECO 2152-04 Optical Plummet Twist Focus Tribrach","description":"\u003ch2\u003e\u003cspan\u003eOverview\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe SECO 2152-04 Optical Plummet Twist Focus Tribrach is a precision instrument-mounting base designed for surveying applications requiring optical centering and reliable leveling.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eIts optical plummet features twist focusing, 2.5× magnification, and a focusing range from 1.5 to 50 feet (0.5 to 15 meters). The tribrach also includes leveling screws with center lines, an 8-minute circular vial, and a three-prong forced-centering system.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eA standard 5\/8-11 base provides compatibility with appropriate surveying tripods and mounting equipment. The SECO 2152-04 is available in Gray, Yellow, and Black.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch2\u003e\u003cspan\u003eKey Features\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e\u003cspan\u003eOptical plummet surveying tribrach\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSECO product series: 2152-04\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTwist-focus optical plummet\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e2.5× optical magnification\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFocusing range from 1.5 to 50 ft\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMetric focusing range from 0.5 to 15 m\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eLeveling screws with center lines\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIntegrated 8-minute vial\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eThree-prong forced-centering system\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eStandard 5\/8-11 base\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAvailable in Gray, Yellow, and Black\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDesigned for precision instrument setup and centering\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTripod and surveying instrument are sold separately\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch2\u003e\u003cspan\u003eTwist-Focus Optical Plummet\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe built-in optical plummet uses a twist-focus mechanism that allows the operator to sharpen the view of the survey point below the tribrach.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eIts 2.5× magnification provides a clear view for positioning a compatible surveying instrument over a control point, monument, nail, stake, or other field reference.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch2\u003e\u003cspan\u003e1.5-to-50-Foot Focusing Range\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe optical plummet has a specified focusing range of:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e\u003cspan\u003e1.5 to 50 ft\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e0.5 to 15 m\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThis broad range supports centering over points at different distances beneath the tribrach, depending on the tripod height and field setup.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch2\u003e\u003cspan\u003eThree-Prong Forced Centering\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe SECO 2152-04 features a three-prong forced-centering system.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eForced centering allows a compatible instrument or accessory to be removed and reinstalled in a repeatable position without requiring the complete tripod setup to be recentered each time.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThis is useful when exchanging compatible instruments, prisms, targets, or other tribrach-mounted equipment over the same survey point.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch2\u003e\u003cspan\u003eLeveling Screws with Center Lines\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe tribrach includes three leveling screws with center-line markings.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThese reference lines help the operator identify the approximate centered position of each leveling screw during setup. Beginning near the center of the adjustment range leaves room for leveling corrections in either direction.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch2\u003e\u003cspan\u003eIntegrated 8-Minute Vial\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eAn 8-minute circular vial provides a visual reference for preliminary leveling.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe vial helps the operator bring the tribrach close to level before completing finer instrument-leveling adjustments. The vial should be checked periodically and adjusted when necessary to maintain reliable setup performance.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch2\u003e\u003cspan\u003eStandard 5\/8-11 Base\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe tribrach includes a standard 5\/8-11 base for mounting to compatible surveying tripods and support equipment.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThis common survey-instrument connection allows the tribrach to be used with appropriately threaded tripods and mounting accessories.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eAlways verify the instrument, tripod, and tribrach interfaces before use.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch2\u003e\u003cspan\u003eAvailable Colors and Part Numbers\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe SECO 2152-04 Optical Plummet Twist Focus Tribrach is available in three colors:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e\u003cspan\u003e2152-04-GRY – Gray\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e2152-04-YEL – Yellow\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e2152-04-BLK – Black\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eSelect the preferred color and corresponding part number before ordering.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch2\u003e\u003cspan\u003eIdeal Applications\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e\u003cspan\u003eTotal station setup\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTheodolite setup\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSurvey instrument centering\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eControl-point occupation\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eConstruction layout\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBoundary surveying\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTopographic surveying\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMonitoring surveys\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eEngineering fieldwork\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eForced-centering survey systems\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch2\u003e\u003cspan\u003eTechnical Specifications\u003c\/span\u003e\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cspan\u003eSpecification\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003eDetail\u003c\/span\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eProduct Type\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eOptical plummet tribrach\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eSECO Product Series\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2152-04\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eOptical Plummet Focus\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eTwist focus\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eMagnification\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2.5×\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eFocusing Range\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1.5 to 50 ft\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eMetric Focusing Range\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0.5 to 15 m\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eVial Accuracy\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e8 minutes\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eCentering System\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eThree-prong forced centering\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eLeveling Screws\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eCenter-line style\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eBase Thread\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e5\/8-11\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eAvailable Colors\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eGray, Yellow, and Black\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch2\u003e\u003cspan\u003eWhat’s Included\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e\u003cspan\u003e1 × SECO Optical Plummet Twist Focus Tribrach\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSelected color and corresponding part number\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eAvailable configurations:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/secoprecision.com\/product\/optical-plummet-twist-focus-tribrach-gray\/\" target=\"_blank\" title=\"SECO 2152-04 Optical Plummet Twist Focus Tribrach\" rel=\"noopener\"\u003e\u003cspan\u003eSECO p\/n: 2152-04-GRY – Gray\u003c\/span\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/secoprecision.com\/product\/optical-plummet-twist-focus-tribrach-yellow\/\" target=\"_blank\" title=\"SECO 2152-04 Optical Plummet Twist Focus Tribrach\" rel=\"noopener\"\u003e\u003cspan\u003eSECO p\/n: 2152-04-YEL – Yellow\u003c\/span\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/secoprecision.com\/product\/optical-plummet-twist-focus-tribrach-black\/\" target=\"_blank\" title=\"SECO 2152-04 Optical Plummet Twist Focus Tribrach\" rel=\"noopener\"\u003e\u003cspan\u003eSECO p\/n: 2152-04-BLK – Black\u003c\/span\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"isSelectedEnd\"\u003eSurveying instruments, tripods, adapters, prism assemblies, and other accessories are sold separately.\u003c\/p\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch2\u003e\u003cspan\u003ePrecision Centering for Survey Instruments\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eThe SECO 2152-04 combines a 2.5× twist-focus optical plummet, broad focusing range, three-prong forced centering, and an 8-minute vial. Its standard 5\/8-11 base and three color options make it a versatile tribrach for professional surveying and construction layout.\u003c\/span\u003e\u003c\/p\u003e","brand":"SECO","offers":[{"title":"Black","offer_id":42794984996944,"sku":"2152-04-BLK","price":229.67,"currency_code":"USD","in_stock":true},{"title":"Yellow","offer_id":42794985029712,"sku":"2152-04-YEL","price":229.67,"currency_code":"USD","in_stock":true},{"title":"Gray","offer_id":42794985062480,"sku":"2152-04-GRY","price":229.67,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0564\/6185\/2752\/files\/SECO-2152-04-Optical-Plummet-Twist-Focus-Tribrach_-SECO-Absolute-Accuracy-Inc-226336249.jpg?v=1784762982","url":"https:\/\/aaisurvey.com\/products\/seco-optical-plummet-twist-focus-tribrach-gray-black-yellow","provider":"Absolute Accuracy","version":"1.0","type":"link"}