The Dowser Bot is an odd dowsing rod-themed Attack Bot. This unnamed Attack Bot wasn't featured in a normal episode, but in the Behind the Scenes show "And... Action". So the basic origins and battles with this bot are either not known, or simple.
This bot was sent into Corinth to attack the city, along with Tenaya 7 and the Grinders. The Rangers quickly responded and fought off the evil army. The Red Ranger fought the bot, and then the Rangers were able to destroy this Attack Bot with the RPM Enforcer.