Raymarine CPT-S Plastic TH 12D High Chirp Transducer

The Raymarine CPT-S Plastic TH 12D High Chirp Transducer is a through-hull sonar solution built for anglers and boaters who demand reliable target detection without the weight penalty of bronze alternatives. After years on the water, you know that transducer choice directly impacts your ability to locate structure, thermoclines, and fish holding zones—especially in demanding freshwater and saltwater environments. This plastic through-hull design delivers the performance serious fishermen expect while maintaining the affordability and durability that make Raymarine a trusted name across recreational and commercial fleets.

Built around a 12-degree angled element with CHIRP sonar capability, the CPT-S generates detailed frequency-swept returns that cut through thermoclines and distinguish fish from debris with clarity you can trust. The angled element geometry is purpose-engineered to provide optimal beam patterns for hull-mounted installations where direct vertical mounting isn't feasible—critical for modern hull designs and retrofit applications. CHIRP technology sweeps across a range of frequencies, dramatically improving target separation and reducing false echoes that plague conventional fixed-frequency transducers. The plastic housing weighs just 2.6 lbs, reducing installation complexity and vibration transfer to your hull while maintaining the acoustic integrity needed for deep-water performance.

This transducer is ideal for anglers running Raymarine CHIRP-compatible fishfinders and integrated navigation systems—whether you're fishing coastal flats, reservoirs, or open ocean. The through-hull configuration demands professional installation to ensure a watertight seal and proper acoustic coupling, but the payoff is unmatched sensitivity and minimal interference from hull noise. Compatible with Raymarine's extensive sounder lineup including CP470, CP570, and modern multifunction displays, the CPT-S scales from small center-console boats to larger cruising vessels. For boaters upgrading aging transducers or building out a new electronics suite, this 12-degree model provides the angle and CHIRP performance needed to stay competitive on the water.