Airmar B117 Transducer Bronze Thru-Hull Low Profile 50/200 kHz

Overview

Built for anglers running 25-foot boats and larger who need a reliable, low-profile transducer that won't create drag or catch your foot on deck. Whether you're fishing shallow bays at 200 kHz or tracking bottom structure in 200 feet of water at 50 kHz, the B117 gives you the dual-frequency performance that serious sonar fishing demands without the hassle of a high-profile installation.

The B117 is the industry standard for anglers who refuse to compromise between clean deck design and sonar quality. Its nearly-flush 5mm profile minimizes hydrodynamic drag while the bronze housing delivers years of corrosion-free performance. Pair it with your Humminbird unit, and you get real-time depth, temperature, and target detail in a package that works on boats with deadrise up to 8 degrees.

Key Features

• Dual-frequency 50/200 kHz — low frequency penetrates deep water and marks bottom structure clearly; high frequency reveals baitfish, suspended targets, and shallow-water detail with precision.
• Low-profile bronze housing — only 5mm extends beyond your hull, eliminating drag and keeping your deck clean so nothing snags if you step on it.
• Single ceramic element design — proven sonar performance in a compact footprint that installs in a standard 2-inch hole.
• Right-angle cable exit — cable runs flat along your hull or inside your cabin, protecting the connection from stress and keeping headroom clear.
• Included rubber washer — lets you tighten the hull nut securely even on irregular or cambered hull surfaces without over-torquing.
• Optional temperature sensor — add water temperature to your sonar display to track seasonal patterns and fish behavior.

Specs & What's Included

Compatibility: This transducer ships with a Humminbird #9 plug and 7-pin connector, ready to connect directly to compatible Humminbird fish finders. Not sure if this works with your setup? Call or text us at (833) 831-4077 — we'll tell you straight.

What You Get: B117 bronze thru-hull transducer with Humminbird #9 plug, mounting hardware, and rubber washer. Your Humminbird unit is sold separately.

Physical Specs: 2-inch hole diameter, fits hulls with up to 8 degrees deadrise, urethane acoustic window. Bronze housing meets ABYC H-27 standards for marine electrical safety.