Airmar TM185C-HW Transducer High Frequency CHIRP 25° Wide Beam

Overview

Who This Is For: Anglers running 25' to 40' boats with Humminbird systems who need wide-angle sonar coverage of the entire water column. If you fish deeper structure, suspended fish, or want to see more bottom detail without dead spots under the transom, this wide-beam CHIRP transducer is built for you.

Product Summary: This is Airmar's high-frequency wide-beam CHIRP transducer—a direct replacement for narrow-beam units that gives you twice the coverage under your boat while keeping image clarity sharp. The constant 25° beamwidth across 150-250 kHz means you'll see suspended fish and structure that narrower beams miss, and those target images will render larger and crisper on your display. For serious anglers who want to fish efficiently and spot everything swimming near bottom, this transducer pays for itself in confidence.

Key Features

• 150-250 kHz CHIRP Band — sweeps across a wide frequency range for detail on bottom structure, suspended baitfish, and hard targets — gives you flexibility to dial in the best frequency for your water conditions and what you're hunting.
• Constant 25° Beamwidth — maintains the same cone angle across the entire frequency range — means twice the lateral coverage compared to standard high-frequency transducers, so fewer blind spots between passes and more area covered per pass.
• 1kW RMS Power — delivers 1,000 watts of transmit power — cuts through heavy cover, deep water, and challenging conditions without signal degradation.
• 600–800' Depth Range — capable in deep offshore structure or open water — you're not limited by transducer depth ceiling if you fish beyond typical freshwater depths.
• Fast-Response Temperature Sensor — tracks water temp in real time — helps you identify and follow thermoclines where gamefish suspend, and confirms seasonal patterns as you run the water column.
• Urethane Housing with Stainless Steel Bracket — resists UV, impact, and saltwater spray — the bracket allows kick-up on hard contact without cracking the transducer face.
• Retrofit-Compatible Mounting — works with existing TM258, TM260, TM265, and TM275 brackets — no hull modification if you're upgrading from another Airmar transom unit.

Specs & What's Included

Compatibility: Humminbird systems with 14-pin transducer connectors and CHIRP-ready electronics. Designed for outboard and I/O installations on fiberglass, wood, or metal hulls. Fits boats 25' to 40'. Not sure if this works with your Humminbird setup? Call or text us at (833) 831-4077 — we'll tell you straight.

In the Box: Transducer only. Cable and connector are integrated with the 14-pin plug that mates to your Humminbird unit.