Raymarine P371 S/T Shorty Speed/Temp Through-Hull Transducer, For i40/i50/ST40/ST60/iTC-5, 10m Cable, Plastic Housing

Overview

The Raymarine E26008 is a low-profile thru-hull speed and water temperature transducer for Raymarine analog instrument systems. It is the ST300/P371 Shorty style sensor, made for boats where space below the sole or under floorboards is tight.

The P371 housing sits nearly flush against the hull, with only 5 mm (3/16 in) extending outside the hull to help limit drag and water disturbance around the paddlewheel. The housing height is 75 mm (2.96 in), and the installation area needs about 153 mm (6 in) of headroom, which makes this unit useful on sailboats and powerboats where a standard thru-hull sensor may be too tall.

This transducer measures speed through water and water temperature, then feeds that data to compatible Raymarine instruments through a 10 m (33 ft) cable with ISO spade connectors. It is a practical replacement or upgrade part for owners maintaining Raymarine instrument displays that rely on an analog speed and temperature input.

Key features

• Low-profile P371 thru-hull housing extends only 5 mm (3/16 in) outside the hull to reduce drag around the sensor area.
• Shorty housing height of 75 mm (2.96 in) helps it fit in tight spaces below floorboards or in shallow bilge areas.
• Right-angle cable exit saves headroom and helps protect the cable path in areas where gear or feet may contact the sensor.
• Self-closing water valve helps reduce water flow into the boat when the insert is removed for cleaning or service.
• Paddlewheel cavity has side fins that help improve speed accuracy when water flow crosses the hull at an angle.
• 10 m (33 ft) cable with ISO spade connectors supports installation runs to compatible Raymarine analog instruments.
• Works with Raymarine i40, i50, ST40, ST60, ST60+, iTC-5 and other compatible analog instrument systems.
• ABYC H-27 compliant thru-hull housing for a cleaner installation in a marine through-hull application.

Installation and setup

This is a through-hull transducer, so installation requires access inside the hull and a proper 2 in (51 mm) cutout. The sensor should be placed where it has clean water flow while underway, away from turbulence caused by strakes, through-hulls, propeller wash, or lifting points.

The low headroom and right-angle cable exit make it easier to install in compact bilge spaces, but the location still needs enough working room to remove the insert for cleaning. A careful dry fit before bedding the housing helps confirm cable routing, service access, and hull clearance.

Compatibility and fit

This transducer is intended for Raymarine instrument systems that accept an analog speed and temperature transducer input. It is commonly used with Raymarine i40, i50, ST40, ST60, ST60+ and iTC-5 systems, and it suits installations where speed through water is needed for sailing performance, trip logging, current comparison, or basic instrument data.

The plastic housing is suitable for fiberglass and metal hulls. Before ordering, match the existing instrument connection, available cable route, hull material, and thru-hull size to the vessel, especially when replacing an older speed sensor already installed in the boat.

Maintenance and care

Like any paddlewheel speed transducer, this unit needs occasional cleaning to keep marine growth, slime, and debris from slowing the wheel. The retractable insert and self-closing valve make routine service more manageable while the boat is in the water, though normal care should still be taken whenever the insert is removed.

This transducer is a good match for owners of cruising sailboats and powerboats who want dependable speed and temperature data without adding a bulky fitting below the hull. It is especially useful where the installation space is limited but regular access for paddlewheel cleaning is still available.

Orders are processed within 2 business days, which includes verification, packing, and dispatch. Orders of $100 or more qualify for free shipping when eligible. For orders under $100, shipping costs are calculated at checkout based on destination, package weight, and selected service. International shipping is available for eligible products, and certain items may require additional handling, warehouse transfers, or may ship directly from the manufacturer, which can affect processing time.

Deliveries are handled by preferred carriers such as USPS, UPS, FedEx, DHL, and others depending on your location and selected service. Estimated delivery times are displayed at checkout and may vary due to customs processing, carrier delays, weather, postal disruptions, or other circumstances beyond our control. Once your order ships, you'll receive a confirmation email with tracking information. Tracking may take up to 24 hours to update on the carrier's website and is also available through your account when applicable.

We ship throughout the United States and to most international destinations for products eligible for international shipping. International orders may be subject to customs duties, taxes, brokerage charges, or other import fees, which are the customer's responsibility and are not included in the product or shipping price. PO Boxes are accepted only when shipping through USPS, and not all packages qualify for this option. If your order does not arrive within the estimated delivery window, please contact us at info@apollolighting.com or +1 (954) 375-0100 so we can assist with locating your package.

Learn more.

Returns may be requested within 30 days of receiving your order. Items must be unused, uninstalled, unaltered, and returned in their original packaging with all tags, packing materials, blank warranty cards, manuals, instructions, accessories, and included items. Certain products, including installed or used electronics, electrical components, lighting, consumables, custom or special-order items, cut-to-length products, safety equipment, and merchandise exposed to water or marine conditions, may not be eligible for return.

To request a return, sign in to your account and select the applicable order and items, and submit your request for review. Eligible unfulfilled items may also be submitted for cancellation within 1 hour of placing the order. Returns or cancellations are not considered approved until you receive confirmation from Apollo Lighting. Please do not ship or drop off merchandise before receiving return approval and instructions.

Customers are responsible for arranging and paying for return shipping unless the return is due to an error by Apollo Lighting or the item is verified as defective, damaged, or incorrect. Missing, damaged, defective, or incorrect items must be reported within 2 business days of delivery, and photos or other documentation may be required for review. If the issue is verified, Apollo Lighting may provide or reimburse return shipping and issue a replacement or refund depending on the circumstances. International customers are responsible for return shipping, duties, taxes, customs charges, brokerage fees, and other costs associated with an international return.

After your return is received and inspected, approved refunds are issued to the original payment method and may take 5-7 business days to appear after processing. Original shipping and handling charges are nonrefundable, and the value of any included free items that are not returned may be deducted from the refund. Apollo Lighting does not charge a standard restocking fee on eligible returns. Returns that are incomplete, damaged, installed, used, altered, improperly packaged, or otherwise do not meet the eligibility requirements may be refused. We recommend using a trackable and appropriately insured shipping service for all customer-arranged returns.

For assistance, contact info@apollolighting.com or call +1 (954) 375-0100.

Learn more.

Many products sold by Apollo Lighting include a manufacturer's warranty covering defects in materials or workmanship. Warranty terms vary by brand, product category, and model, so eligibility, coverage duration, exclusions, and available remedies are determined by the applicable manufacturer. We recommend reviewing the warranty information provided with your product before installation or use, especially for marine electronics, navigation equipment, lighting, electrical systems, pumps, safety equipment, and other specialized marine products.

If you need warranty service, the claim must follow the process established by the manufacturer, authorized service center, or designated warranty provider. You may be asked for proof of purchase, a serial number, product registration, photos, maintenance or installation records, or other documentation. Apollo Lighting does not determine or modify a manufacturer's warranty coverage or final claim decision, but we are happy to help provide purchase information and direct you to the appropriate manufacturer or warranty resource.

Keep your receipt, product documentation, serial number information, and original packaging when practical. Damage caused by normal wear, misuse, improper installation, insufficient maintenance, corrosion, impact, unauthorized modifications, electrical issues, or operation outside the manufacturer's specifications may not be covered. Warranty claims are separate from standard returns, so a product that has been installed, used, or exposed to marine conditions may no longer qualify for return while still remaining eligible for evaluation under the manufacturer's applicable warranty.

Learn more.