The Buzzsaw ride at Dreamworld has reopened, after six passengers were left stranded in mid-air on the Gold Coast on Monday.

The passengers were stuck in a vertical forward-facing position just before 1pm and were unloaded safely from the ride about 30 minutes later.

A Dreamworld spokesman said the ride was assessed by engineers throughout the afternoon and reopened just before 3pm.

A safety sensor was to blame for the stoppage, after it was triggered and immediately stopped the ride halfway into the vertical climb to the peak.