MidAmerican Technology offers the extensive range of RadioDetection SONDES.

Standard Sonde - The standard sonde can transmit a 33kHz or 512Hz frequency up to 16ft deep. It can be used with a Radiodetection RD4000 receiver.

Super Sonde - Use this sonde to locate pipe up to 50ft deep. It transmits 33kHz and runs off of a single 9V battery for 15hrs. It measures 2.5" in diameter and 12.5" in length.

Bendi Sonde - This sonde is recommended by plumbers. It's highly flexible to fit through most corners. It can transmit in 512Hz or 33kHz up to 20ft deep.

S18 - The S18A sonde can transmit a 33kHz locate signal up to 12ft deep. It is used to locate pipe and cable duct when matched with a Radiodetection receiver.
 

Sewer Sonde - This sonde is built rugged for sewer pipe. It transmits a 33kHz signal up to 26ft deep. It measures 2.5" in diameter and 6.625" in length.