Harms had two chances to win it on the final day having secured it on the Order of Merit, he ended up reaching the final on Day Four but Steffen Siepmann saw off the Dutchman.
He reflected afterwards though and called the tournament which he was playing in for the first time 'tough' but that he cannot wait for the challenge.
"It has been a really tough four days," Harms admitted.
"My goal was to make the quarter-final every time but after I went out in the last 32 on the first day I was worried, but my last day made up for it.
"Everything will be new for me but I am looking forward to playing in the PDC for the first time."
https://twitter.com/OfficialPDC/status/1218952800316665856