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Humminbird

XPTH 9 20 MSI T - Plastic Thru Hull DualBeam MEGA SI MEGA DI Transducer

Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.

Plastic Thru-hull

Transducer for Humminbird sonar systems

Supports Mega

SI and MEGA DI imaging

Includes Dualbeam

20/60/86/55 degree beam angles

Operates 200/83/455/800

KHz and 1.2 MHz

Built-in Temperature

Sensor included

$429.99
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SKU: 1093558

Overview

Designed for boaters who want a through-hull transducer setup with multiple imaging options, this Humminbird model supports MEGA Side Imaging, MEGA Down Imaging, and DualBeam PLUS in a single unit. It is intended for use with compatible sonar systems that benefit from the listed beam angles and frequencies, including 200/83/455/800 kHz and 1.2 MHz. The built-in temperature feature adds another layer of onboard information for interpreting conditions while on the water. As a plastic thru-hull design, it suits installations where a permanent transducer mount is preferred.

Why Hunters Choose the Humminbird

Supports Mega

SI and MEGA DI imaging

Dualbeam Plus

Multiple beam options: 20, 60,

Covers 200,

83, 455, 800 kHz, plus

Includes Built-in

Temperature sensing for added onboard

Plastic Thru-hull

Design suits compatible in-hull installations

Key Features

  • Plastic thru-hull transducer for Humminbird sonar systems.
  • Supports MEGA SI and MEGA DI imaging modes.
  • Includes DualBeam PLUS with 20/60/86/55 degree beam angles.
  • Operates at 200/83/455/800 kHz and 1.2 MHz.
  • Built-in temperature sensor included.

Best Used For

  • Boat owners needing a plastic thru-hull transducer for Humminbird MEGA SI and MEGA DI sonar setups.
  • Anglers wanting DualBeam PLUS coverage with multiple cone angles for broader sonar interpretation.
  • Users running 200, 83, 455, 800 kHz, or 1.2 MHz frequencies in a compatible Humminbird system.
  • Operators who want built-in temperature reading included with their transducer installation.
  • Serious anglers upgrading to a thru-hull mount for a cleaner, permanent sonar installation.

Specifications

Beam Angles20/60/86/55 degrees
Built In TemperatureIncluded
Frequencies200/83/455/800 kHz and 1.2 MHz
MaterialPlastic
ModelXPTH 9 20 MSI T
Mount TypeThru Hull
Sonar TechnologiesMEGA SI, MEGA DI, DualBeam PLUS
Transducer TypePlastic Thru Hull

Pros

  • Supports MEGA SI and MEGA DI imaging modes for versatile sonar coverage.
  • DualBeam PLUS offers multiple beam options: 20, 60, 86, and 55 degrees.
  • Covers 200, 83, 455, 800 kHz, plus 1.2 MHz frequencies.
  • Includes built-in temperature sensing for added onboard data.
  • Plastic thru-hull design suits compatible in-hull installations.

Considerations & Trade-offs

  • Plastic thru-hull installation is more involved than a transom-mount setup and is best suited to boats configured for that style of mounting.
  • The unit is specified as plastic, which may be a consideration for buyers comparing mounting material preferences within their rigging setup.
  • Its MEGA SI, MEGA DI, and DualBeam PLUS capabilities are tied to compatible Humminbird electronics, so system compatibility should be confirmed before purchase.
  • The wide range of frequencies and beam angles offers flexibility, but it also means setup choices may need to be matched carefully to the way the boat is used.

Suggested Comparisons

  • Thru-hull transducers
  • Side imaging transducers
  • Down imaging transducers
  • Dual-beam sonar transducers

Suggested Accessories

  • Transducer mounting hardware
  • Marine sonar display unit
  • Marine cable extension
  • Marine sealant

Frequently Asked Questions

What kind of transducer is the XPTH 9 20 MSI T?

It is a plastic thru-hull transducer from Humminbird.

What sonar features are listed for this model?

The listed features are MEGA SI, MEGA DI, and DualBeam PLUS.

What frequencies and beam angles are provided in the product data?

The product data lists 20/60/86/55 degrees and 200/83/455/800 kHz, plus 1.2 MHz.

Does this transducer include temperature sensing?

Yes. The short description states that it includes built-in temperature.

Is any installation hardware or accessory package listed?

No additional installation hardware or accessories are specified in the provided product data.