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Raymarine CPT-S 20° Bronze Thru-Hull (E70341) is a High CHIRP smart sonar transducer precision-crafted from cast bronze for low-profile thru-hull installation. Engineered with a fixed 20° internal element tilt, it compensates for steeper hull deadrise angles ranging from 15° to 25° to project the acoustic beam vertically downward without requiring an external fairing block. Its flush, low-profile design sits flat against fiberglass or wood hull surfaces to minimize drag and reduce turbulence at speed. Operating across High CHIRP frequencies (170 kHz to 230 kHz) with a 25° conical beam width, the CPT-S 20° Bronze delivers crisp target separation, accurate depth tracking, and clear bottom imagery down to 900 ft.
| Specification | Details |
| Part Number (SKU) |
E70341 |
| Model |
CPT-S 20° Bronze Thru-Hull Mount |
| Mounting Type |
Low-Profile Thru-Hull (Tilted Element) |
| Housing Material |
Cast Bronze |
| Hull Material Compatibility |
Fiberglass or Wood hulls (Requires isolation fairing kit for Metal hulls) |
| Element Tilt Angle |
20° Fixed Internal Tilt |
| Hull Deadrise Compatibility |
15° to 25° Deadrise |
| Power Rating | 100 W RMS |
| Operating Frequency | High-Band CHIRP (170 kHz to 230 kHz) |
| Beam Width | 25° Conical Beam |
| Maximum Depth Range | Up to 274 m (900 ft) |
| Built-in Sensors | Fast-response Water Temperature, Depth |
| Connector Type | Raymarine 9-Pin Element S / CP100 / Axiom DownVision Connector |
| Cable Length | 10 m (33 ft) attached cable |
| Waterproof Rating | IPX6 / IPX7 |
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