Dutch rights groups Terre des Hommes said in November last year it had used a computer-generated Filipina girl dubbed "Sweetie" in Internet chat rooms to ensnare paedophiles.
Over a 10-week period more than 20,000 predators from 71 countries approached the virtual 10-year-old asking for webcam sex performances and that more than 1,000 paedophiles had been identified as a result.
The group has said that several offenders have since been arrested after the information was passed onto police, including in Australia, Poland and the United States.
Court officials said that 38-year-old Hansen had been sentenced on three charges, including using a carriage service to transmit indecent communications to a person aged under 16, and possessing child exploitation material on Tuesday.
He was also charged with failing to comply with a sex offenders order.
"He was given a two-year sentence, suspended after 260 days he has already served in custody," a court spokeswoman told AFP.
Terre des Hommes has said they did not approach anyone on the Internet but instead waited for people to approach Sweetie and ask for sex acts.
Australian Federal Police are understood to have searched Hansen's home following a web chat with "Sweetie" in which he was naked and masturbated, a spokesman for Terre des Hommes told news.Com.Au.
When the sting was revealed in 2013, Terres de Hommes said its researchers found the experience shocking.
"To put yourself in the shoes of a 10-year-old Filipina girl and seeing what some men want from you has been a shocking experience for them," said its head of campaigns Hans Guyt.
"Some demands and acts were really obscene."
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