Raymarine i40 Depth Display System w/Transom Mount Transducer - E70143

The Raymarine i40 Depth Display System with Transom Mount Transducer (E70143) provides accurate, easy-to-read depth information in a compact and reliable marine instrument designed for both sailboats and powerboats. Featuring a high-contrast LCD with large digits and red backlighting, the i40 Depth display ensures excellent visibility in bright sunlight and low-light nighttime conditions.

This complete system includes a transom-mount depth transducer, making installation quick and straightforward without the need for thru-hull drilling. Native SeaTalk connectivity allows seamless integration with Raymarine instrument systems, with compatibility for SeaTalkng and NMEA 2000 networks using optional adapters. Designed to match the footprint of legacy ST40 instruments, the Raymarine i40 Depth Display System is an ideal upgrade solution, delivering dependable depth monitoring to enhance safety and confidence on the water.

📊 Technical Specifications — Raymarine i40 Depth Display System w/ Transom Mount Transducer (E70143)

📟 Display & Instrument

• Instrument Type: i40 Depth Display — dedicated marine instrument for real-time water depth monitoring.

• Display Format: High-contrast 2-line monochrome LCD with large digits for easy viewing in bright and low-light conditions.

• Backlighting: Integrated red backlight for nighttime and low-visibility use.

⚡ Power & Electrical

• Nominal Supply Voltage: 12 V DC (marine standard).

• Operating Voltage Range: 10 V to 16 V DC.

• Power Consumption:

  • Typical: ~35 mA (display only)

  • Max: ~100 mA (with transducer).

• Network Compatibility:

  • Native SeaTalk instrument connectivity

  • Compatible with SeaTalkng via interface

  • Can integrate with NMEA 2000 networks using adapters.

📏 Transducer

• Transducer Type: Transom mount depth transducer — ideal for small to medium craft without thru-hull installations.

• Application: Measures depth below the hull via a transom-mounted sensor.

• Cable Length: Standard marine transom transducer cable (length varies by kit).

• Hull Compatibility: Suitable for most planing and displacement hulls at appropriate speed ranges.

• Temperature Sensor: Integrated temperature sensing included in transducer.

🌐 Connectivity & Interface

• SeaTalk: Yes (native) — for data sharing with Raymarine instrument networks.

• SeaTalkng: Compatible with available SeaTalkng cabling and connectors (sold separately or via network kits).

• NMEA 2000: Compatible with NMEA 2000 networks using an appropriate adapter/gateway.

• Instrument Expansion: Can function as a standalone depth display or as part of a Raymarine instrument network.

🧰 Physical & Environmental

• Display Dimensions: ~128 mm × 72 mm × 35 mm (approx).

• Mounting Style: Surface mount with included gasket; optional bracket kits available.

• Waterproof Rating: IPx6 marine-rated splash protection.

• Operating Temperature: –10 °C to +55 °C (14 °F to 131 °F).

• Storage Temperature: –30 °C to +70 °C (–22 °F to 158 °F).

• Relative Humidity: Up to ~93 %.

📦 Included in the Kit

• i40 Depth Display Instrument

• Transom Mount Depth Transducer

• Surface mount gasket & hardware

• SeaTalk/SeaTalkng power cable

• Suncover(s) for instrument protection

• User documentation and installation instructions

📌 Typical Use & Installation

• Ideal for depth monitoring on small to medium sailboats and powerboats.

• Easy installation with transom-mount sensor — no hull cutting required (vs thru-hull units).

• Integrates into Raymarine instrument networks for shared data on multifunction displays and autopilots.

i40 SeaTalk Instruments - Depth w/Transom Mount Transducer

Compact and feature-packed instruments, the i40 series instruments are smart choice for boaters looking high performance and great value.

The i40 series is simple to operate thanks to the use of just three control buttons, i40 has extra-large digits and razor-sharp LCD displays and red backlighting for outstanding visibility in all lighting conditions.

These SeaTalk compatible instruments offer full integration with Raymarine autopilots and navigation equipment. The ultra-sleek design of i40 line is designed to complement our full line of a-Series, c-Series and e-Series Multifunction displays, and looks great on the helm of any boat. All i40 Instruments come with a low-profile surface mounting kit and silicone rubber sun cover. An optional bracket mounting kit is also available separately.

i40 Instruments are designed to operate from 12V DC power, and are ultra-efficient drawing less than 0.4 watts for superior run-time and excellent green credentials. The i40 instruments are all covered by Raymarine's industry leading 2-year warranty, upgradeable to 3-years at no charge by registering online with 90 days of purchase.

i40 Depth Instrument
Raymarine's i40 Depth Instrument is available as a complete system with a thru-hull transducer, or as a display-only kit enabling you to monitor your boat's depth at a remote location. The i40 Depth Instrument offers easy-to-read displays of current depth, and minimum depth recorded. The unit also offers a convenient shallow depth alarm, deep depth alarm, shallow anchor alarm, and deep anchor alarm. The i40 Depth Instrument offers convenient depth offset controls allowing you to calibrate the readout to compensate for projections (rudders, props, skegs etc.) or to display the depth from the waterline of the vessel.

i40 Key Features

• Ultra-modern design complements Raymarine's latest a-Series, c-Series and e-Series Multifunction display and instrument systems.
• High contrast LCD displays with large digits for excellent visibility.
• Red backlighting for outstanding night-time visibility.
• Simple SeaTalk networking with other Raymarine instruments, autopilots and MFDs.
• Built-in transducer connections simplify installation.
• Small form factor saves space at the helm without sacrificing features.