The metal detector is light gray, and has a black handle attached to the bottom of the display, and attached to the display are headphones.
It is bluish-gray and has a display that connects directly to the search coil using a wire.
It is pale green with a dark green handle, and has a similar design to the version in "Selling Out."
Role in series
SpongeBob uses a metal detector at Goo Lagoon where Sandals wants to use SpongeBob's metal detector, as his broke, so SpongeBob allows him to use it. However, Plankton, who is trying to teach SpongeBob to be assertive at the time, attempts to get SpongeBob to take back his metal detector, but this only helps Sandals find buried treasure.
A metal detector is used once again by Mr. Krabs who is searching SpongeBob's house for a penny. SpongeBob catches Mr. Krabs in the act and even wonders why Mr. Krabs isn't wearing his "metal detector handling gloves."