Echonautics BT87L1KW

1kW Low Frequency CHIRP Transducer

This low-profile bronze thru-hull transducer minimizes drag below the hull surface, making it ideal for centre consoles and other high-performance fishing boats. With nothing to interfere with clean water flowing across the transducer face, this design delivers optimum sonar performance at higher boat speeds, meaning that anglers can detect fish and track bottom when trolling or motoring to offshore fishing grounds. The BT87 Series’ narrow beam width and angled element design provides vertical beam orientation, making it excellent for pinpointing fish holding tight to reefs, wrecks, and other structure.

Powerful 1kW CHIRP performance provides superior fish detection and enhanced sonar detail in deep water. Available in 0°, 12°, and 18° tilt versions for use on vessels with various hull deadrise angles up to 24°. Each tilt variation is available in Low Frequency CHIRP (40-60kHz), Medium Frequency CHIRP (85-135kHz) and High Frequency CHIRP (130-210kHz). The BT87 Series is a powerful solution for many high-performance CHIRP sonar systems.

The CHIRP Advantage

Traditional marine echosounders operate at set frequencies (50 or 200kHz, for example) and transmit a short-duration pulse to display targets under the boat that can be identified by the specific frequency being used. CHIRP sonar (which stands for Compressed High Intensity Radar Pulse) emits a sweep pattern of many frequencies within a long-duration pulse. As a result, the sound energy delivered underwater is up to 1,000 times greater than conventional sonar — providing better deep-water penetration, improved fish detection and target separation, enhanced bottom detail and better sonar performance at higher vessel speeds. CHIRP sonar performance can be further enhanced by selecting a transducer style and CHIRP frequency range that best matches the vessel, water conditions, depths fished, and target species. For this reason, Echonautics offers a range of CHIRP transducers in Low, Medium, and High CHIRP frequency ranges. Our experts can help you find the ideal CHIRP transducer and frequency range to maximize your fishing success.

Tilt / Deadrise

• 18° tilt version: for 16° to 24° hull deadrise
• 12° tilt version: for 8° to 15° hull deadrise
• 0° tilt version: for 0° to 7° hull deadrise

Mix and Match Adapter Cables

Echonautics transducers come with 8-meter/26-foot cables and standard 8-PIN Male connectors. One-meter/3.3-foot adapter cables are available through Echonautics.

• CBCCMS0501 Adapter Cable: Male 8-PIN black box connector (Seiwa, SI-TEX, Lorenz, JMC, Polar, MPS and JRC-Europe FF-901)
• CBCCMS0503 Adapter Cable: Female 8-PIN Garmin connector
• CBCCMS0502 Adapter Cable: Male 9-PIN Navico connector (Lowrance, Simrad, B&G)

These mix-and-match adapter cables make it simple to integrate high-performance Echonautics transducers with popular sonar systems from leading manufacturers.

Key Features

• Sonar type: CHIRP ready
• Frequency: CHIRP 40 - 60 kHz
• Function: Depth and Temperature
• Power: 1kW
• Beam width: 34° to 20° @ 3db
• Mounting: Thru Hull, Hole Diameter 90 mm (3.54”)
• Material: Bronze
• Precision Engineering for Reliable Performance
• Advanced CHIRP Capabilities for Deeper Penetration
• Clear, Consistent Performance Across the Range
• Designed in USA, Manufactured in Italy
• Trusted Support — Backed by a 3-Year Warranty