Airmar SS502 50/200khz stainless steel transducer.

The Airmar SS502 is a highly regarded and robust dual-frequency transducer crafted from durable stainless steel, designed for thru-hull mounting on diverse marine vessels. Its core strength lies in its ability to operate simultaneously at both 50 kHz and 200 kHz, offering versatility for varied fishing and navigation scenarios: the 200 kHz narrow beam excels in shallower waters by providing exceptional detail for identifying fish arches and bottom structures, while the 50 kHz wide beam ensures superior performance and deep-water detection. Additionally, the SS502 integrates a precise water temperature sensor, supplying critical data to compatible fishfinders or chartplotters. For optimal hydrodynamic performance, especially on planing hulls and to ensure accurate sonar returns at all speeds, Airmar strongly recommends installing the transducer with a purpose-built high-performance fairing block that aligns its face flush with the hull, typically designed for 0° deadrise applications.

Technical Specification

Transducer Type:

Mounting Style: Thru-Hull
Housing Material: Stainless Steel
Included Accessory: Designed for use with an Airmar high-performance fairing block (often recommended or required for optimal performance, especially on planing hulls, to ensure a 0° deadrise alignment and minimize turbulence).

Sonar Performance:

Frequencies: Dual-Frequency
- Low Frequency: 50 kHz
- High Frequency: 200 kHz
Power (RMS): 600 W (Watts)
Beamwidths:
- 50 kHz: 45° (wide beam, for deep water and broader coverage)
- 200 kHz: 12° (narrow beam, for shallow water detail and target separation)
Maximum Depth: Approximately 800-1,200 feet (244-366 meters), depending on the connected fishfinder’s power and bottom conditions.

Sensor Integration:

Depth Sensor: Yes
Temperature Sensor: Yes (accurate water temperature readings)
Speed Sensor: No (does not provide speed-through-water data)

Electrical & Connectivity:

Cable Length: Typically 33 feet (approximately 10 meters).
Connector: Varies by manufacturer (e.g., 8-pin for Garmin, 10-pin for Furuno, etc. – it’s crucial to select the correct version for your fishfinder/chartplotter).

Installation:

Supported Deadrise/Transom Angles: Typically designed for 0° deadrise when installed with the recommended fairing block.
Hull Material Compatibility: Suitable for all hull types, including fiberglass, wood, and metal (requires isolation ring/sleeve for metal hulls to prevent electrolytic corrosion).

Physical:

Impact Resistance: High, due to stainless steel construction.
Dimensions (approximate, for the transducer body):
- Length: Approx. 8 inches (20.3 cm)
- Diameter: Approx. 3 inches (7.6 cm)
- Note: These are general body dimensions; the full fairing block adds to the overall footprint.

Compliance: