A drone team and two all-terrain vehicles were used to check for any hot spots after the fire service said “all fire fronts were extinguished” on Monday afternoon.
It said Dartmoor Rangers would revisit the site on Tuesday.
The fire service said: “Crews were assisted by Dartmoor rangers and commoners using firefighting equipment.
“Crews used five Argo Cat vehicles, fogging units, leaf blowers and a drone for environmental protection.”
The BBC understands the fire service are still investigating the cause of the fire.
Earlier it had asked people to avoid the area and advised anyone whose property was affected by the smoke to close their windows.
At about 10:45 BST, a spokesperson for the fire service asked people to avoid the Merrivale and the Okehampton range areas.
There were 10 appliances at the scene, most of which were “special fire appliances for moorland firefighting”, the spokesperson said.
