POLICE will use a low-flying helicopter and kayaks along the South Esk River at Perth as the search for missing Launceston man Ben Plowright ramps up.
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Last month, a reported sighting of the Launceston 20-year-old saw police conduct forensic tests on an unknown substance on Mill Road.
The results of the tests showed no trace of blood or Mr Plowright.
On Tuesday, police decided to search the South Esk River again in a bid to find more clues about what happened to the young social photographer.
The date of the river search has not yet been determined.
Police do not suspect foul play in Mr Plowright's disappearance.
He was last seen leaving a party at Perth about 9pm on May 30, wearing a grey hoodie, jeans, bright-coloured Converse shoes and glasses.
A large-scale search of Perth in mid-June was Tasmania's largest missing persons search in 30 years, but it returned no trace of Mr Plowright.
Tasmania Police has since seized control of his Facebook page in a bid for clues. Mr Plowright is described as 175 centimetres tall, of slim build with brown hair. He is of Thai descent.
Police urge anyone with information to call Crime Stoppers on 1800 333 000 or Launceston police on 131 444.
