The Dual Frequency Sonde is a small battery powered transmitter. It allows users to trace non-metallic sewers, ducts, drains or pipes by producing a signal which can be traced by cable avoidance tools. It can also be used to locate blockages or collapses in underground services.  Typically it is attached to a drain rod, however It can also be fitted to other moving objects such as boring tools or cameras.

Features:

• Dual frequency modes (8 kHz or 33 kHz) for added flexibility.
• Small & compact design measuring only 38mm in diameter and 130mm in length, designed specifically for restrictive environments.
• High signal range up to 5 metres.
• LED indicator to show signal output and changes colour depending on the frequency in use. 
• Powered by a single AA battery you can typically expect 10 hours of continuous use.
• Built to IP67 standards to withstand tough site conditions.
• Complete with a standard M10 male screw thread, drain rod adapter and a male to female thread converter.