Fisher XLT 30 A, XLT 30 B, XLT 30 C and XLT 30 D Comparison

Find leaks easily with Fisher XLT-30 Leak Detectors. With Fisher XLT-30 models, leaks can be heard at different sources, including hydrants, meter pits, valves and underground. You can purchase the unit in one of four different configurations detailed below. While the base system is the same, it is the sensors that change in each package. Each of the optional sensors is described in greater detailed below. Always have the right tool for the job by choosing the right combination of sensors.

Choosing the best Sensors for the Fisher XLT-30 Leak Detector

  • The "Big Foot" is for use on walking water mains, asphalt and concrete.
  • The "Multi-Sensor" is VERY similar to the "Big Foot," but it is a smaller version.
  • The "Little Foot" is specifically designed for indoor use—an excellent sensor for plumbers.

If you are not sure which way to go, a popular choice is the XLT-30 "Option D" as this model combines both the "Big Foot" sensor and the "Multi-Sensor," which is perfect for multiple applications.

Fisher XLT 30 Water Leak Detector Video Overview and Instructions

Making Changes to the Filter

Some leaks are small in size or conditions are such that very little leak sound can be recognized, so you may need to make changes to the filter(s) in order to hear leaks. Depending upon the type of pipe composition and soil (ground) type, different filter settings will increase your ability to hear the leak sound. Adjustment to the filter is done by pressing the FILTER pad which will allow you to scroll through four different filter types. Frequency range modifications can be made to the HI, LO, and FC filters. As you are choosing your filter, the display screen will give a visual display of the filter type being used, and the frequency range of that filter. After your selection and modification is made, depress the RESUME pad to return to the Sound Graph function of the display screen.

"Option A:" XLT-30 Big Foot Microphone & Hydrophonic Probe

Big Foot Sensor - Also known as the Ground Microphone, this sensor is to be used on hard surfaces, concrete, asphalt, tile, etc. A flexible rubber shield helps prevent outside sounds from interfering with the sounds from the buried pipe. The more density the pipe material, the better it will conduct sound. Press and hold the red button near the handle to mute the audio from the probe and suppress loud sounds when the probe is moved.

Fisher XLT 30-A Liquid Leak Detector Standard Equipment:

  • Heavy-Duty Carrying Case
  • Hydrophonic Cylinder Probe
  • Probe Cable Assembly
  • Operation Manual
  • Control Unit
  • Headphones
  • Big Foot Microphone
  • Carry Strap
  • Housing Bracket
  • Sound Rods

"Option B:" Multi-sensor Microphone:

Multi-Sensor - Fisher’s MULTI-SENSOR model has superior leak detection capabilities in an extremely compact design. The Multi-sensor is basically identical to the "Big Foot"- except it is a smaller version. Fisher has achieved higher performance, improved audio clarity, improved sensor electronics, and better sensitivity to leaks with less background noise – all with heavy duty characteristics of the trusted Big Foot. The MULTI-SENSOR is used for both the ground microphone and direct contact applications – the one sensor that does it all. Fisher’s XLT-30 MULI-SENSOR combo sets the new standard for leak detection.

Fisher XLT 30-B Liquid Leak Detector Standard Equipment:

  • Heavy-Duty Carrying Case
  • Probe Cable Assembly
  • Operation Manual
  • Control Unit
  • Headphones
  • Multi-Sensor
  • Carry Strap
  • Housing Bracket
  • Sound Rods

"Option C:" Little Foot Microphone & Hydrophonic Probe:

"Little Foot" Assembly - About the size of a computer mouse, this small handheld sensor is designed for areas that the "Big Foot" Sensor cannot fit into. The "Little Foot" assembly is normally used for leak detection inside buildings. Mute is activated by pressing the button in front of the "Little Foot" Assembly.

Fisher XLT 30-C Liquid Leak Detector Standard Equipment:

  • Heavy-Duty Carrying Case
  • Hydrophonic Cylinder Probe
  • Probe Cable Assembly
  • Operation Manual
  • Control Unit
  • Headphones
  • Little Foot Microphone
  • Carry Strap
  • Housing Bracket
  • Sound Rods

"Option D:" Big Foot & Multi-sensor Microphones:

This is the best of both worlds with both the "Big Foot" Sensor and the Multi-Sensor all in one affordable package!

"Big Foot Sensor" - Also known as the Ground Microphone, this sensor is to be used on hard surfaces, concrete, asphalt, tile, etc. A flexible rubber shield helps prevent outside sounds from interfering with the sounds from the buried pipe. Press and hold the red button near the handle to mute the audio from the probe and suppress loud sounds when the probe is moved.

Multi-Sensor - Fisher’s MULTI-SENSOR has superior leak detection capabilities. In an extremely compact design, Fisher has achieved higher performance, improved audio clarity, improved sensor electronics, and better sensitivity to leaks with less background noise – all with heavy duty characteristics of the trusted "Big Foot."The MULTI-SENSOR is used for both the ground microphone and direct contact applications – the one sensor that does it all. Fisher’s XLT-30 MULTI-SENSOR combo sets the new standard for leak detection.

Fisher XLT 30-D Liquid Leak Detector Standard Equipment:

  • Heavy-Duty Carrying Case
  • Probe Cable Assembly
  • Operation Manual
  • Control Unit
  • Headphones
  • Multi-Sensor
  • Carry Strap
  • Housing Bracket
  • Sound Rods
  • Big Foot Microphone

See pricing, specifications, compatible accessories, product reviews and videos for each of the Fisher Industrial XLT 30 series leak detector models on the pages below:

Fisher XLT 30 A Leak Detector with Big Foot
Fisher XLT 30 B Leak Detector with Multi Sensor
Fisher XLT 30 C Leak Detector with Little Foot
Fisher XLT 30 D Leak Detector with Big Foot and Multi Sensor

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