Pipe and sewer locating sondes

What is a locating probe?

Locating probes (also known as sondes or sewer probes) are battery-powered transmitters that emit a definable locating signal. Using a compatible receiver, the position and depth of a pipe or obstacle can be determined precisely – ideal for documentation, maintenance and damage assessment.

Drinking water and sewer probes: the right design

The appropriate probe depends on the medium and the operating environment:

• Drinking water probes: pressure-resistant, corrosion-resistant housings for clean media and water supply pipe networks.
• Sewer probes: particularly robust against abrasion and contamination – can be pushed through underground pipes, service connections and main sewers using inspection systems or push rod coils.

Frequencies & range

The choice of frequency determines location accuracy and susceptibility to interference:

• Low frequencies (e.g. 512/640 Hz): pinpoint location at greater depth and low susceptibility to interference.
• 33 kHz: a versatile standard for many applications with good signal pick-up.

Select the frequency to suit the network environment, depth and material.

Guide to selecting the right probe

• Pipe diameter & medium: choose the appropriate probe diameter and seal tightness.
• Operating depth: match the range and frequency to the depth and environment.
• Compatibility: match the frequencies with your receiver or locating system.
• Handling: note the attachment to the push rod coil, inspection cable or push rod.

Practical applications

• Determine pipe routes and find branches
• Locate blockages and obstructions
• Depth measurement and route documentation

Frequently asked questions about locating probes

Which frequency is the right one?

512/640 Hz is suitable for deep positions and low-interference location; 33 kHz is a universal standard for many applications.

Are the probes compatible with my receiver?

Yes, provided the frequencies match. Check the technical specifications of the probe and receiver for identical frequency bands.

How do I find the optimal probe size?

Base your choice on the pipe diameter and bend radii. Smaller probes pass through bends more easily, while larger ones can be located more easily from greater depths.

Are the probes suitable for pressure pipes?

Pressure- and media-resistant versions are available. Note the specified pressure rating and leak-tightness class.

How is the probe inserted?

Via push rod coils, push rods or inspection systems. Secure the probe firmly and guide it through bends and fittings without applying force.