Fisher XLT30-C Acoustic Leak Detector with Little Foot & Hydrophonic Probe

Fisher XLT30-C Acoustic Leak Detection System with Little Foot Sensor

The Fisher XLT30-C acoustical leak detector is engineered for precise underground and in-building water leak detection. This configuration includes the Little Foot handheld sensor and Hydrophonic Cylinder Probe for both surface and direct-contact pipe listening. The control unit integrates advanced filtering and audio amplification for accurate leak pinpointing.

Advanced Audio Filtering & Leak Isolation Controls

• Operating frequency: 60 Hz–6 kHz (Gain 95 dB), 20–60 Hz (Gain >90 dB)
• All Pass, Low Pass, High Pass, Band Pass, and Notch filtering modes
• Adjustable frequency range from 150 Hz to 2.4 kHz (select filters)
• LCD bar graph with 2-digit numerical sound level readout
• High-performance 64-ohm headphones output

Dual Surface & Direct Pipe Contact Detection

The Little Foot sensor enables leak detection in confined indoor spaces, while the Hydrophonic Cylinder Probe allows direct pipe contact using sound rods and T-handle assemblies. Adjustable filters and notch rejection help isolate leak signatures from environmental noise such as traffic or mechanical interference.

Designed for Professional Water Leak Detection Applications

• Underground municipal water line leak detection
• In-building plumbing system diagnostics
• Direct-contact pipe listening via hydrants or exposed piping