28
Non-metallic pipes such as sewers or drains, service ducts, plastic gas and water pipes are not electrically conductive
and so will not be detectable using a Locator on Power or Radio Modes. It is also impossible to apply a detectable
Signal Generator signal to the non-metallic pipe or, for that matter, to the water or gas within that pipe.
If access can be gained into these pipes then a C.Scope Sonde, Plastic Pipe Tracer or Flexible Tracer
should make it possible to determine their position and route.
Sondes
The C.Scope 33kHz General Purpose Sonde and Duct Sonde are small, battery powered, waterproof transmitters that can
be inserted into a pipe, such as a sewer, drain or cable duct. The position of the Sonde (and therefore the location of the pipe)
can be pinpointed by using the Locator switched to Generator Mode.
The Sonde is inserted into and then moved along the pipe to the point at which the pipe needs to be located.
This is normally done by fitting the Sonde to drain rods. Alternatively, the Sonde can be attached to a continuous
fibreglass duct rodder, jetter hose or camera inspection system.
l
The 33kHz General Purpose Sonde can be used in pipes as small as 5 0mm (2”) in diameter and up to 4.5metres (14’9”) deep.
l
The 33kHz Duct Sonde can be used in pipes as small as 3 0mm (1.1”) in diameter and up to 4.5 metres (14’9”) deep.
Non-Metallic Pipe Tracing using a Sonde
NOTE Only the 33kHz General Purpose Sonde and 33kHz Duct Sonde can be used with the CXL3 and DXL3 Locators.
Other frequency Sondes will not be detectable using the CXL3 and DXL3.
NOTE A 33kHz Sonde will NOT transmit a signal through a metal pipe.
