B&G DT800 Depth/Temp Thru-Hull Sensor, NMEA 2000, 0 Degree, Plastic, 2 m Cable, No Speed Connection

Overview

The B&G 000-11738-001 is a NMEA 2000 through-hull depth and water temperature sensor with a 0° (untilted) element and a 2 m Micro-C cable for connection to a Micro-C backbone.

It installs in a 51 mm (2 in) hole using the supplied plastic flanged housing and reports depth up to 180 m (590 ft) at 235 kHz with a 12° beam. On the temperature side, it measures water temperature from -10°C to 40°C (14°F to 104°F) with ±0.5°C (±1.8°F) accuracy, and it is powered from the NMEA 2000 network at 9 to 16 V DC (4 LEN load).

Key features

• Depth and water temperature data on NMEA 2000 using standard PGNs
• 0° element suited to hull deadrise angles from 0° to 7°
• 51 mm (2 in) plastic flanged through-hull housing for a clean, permanent install
• 2 m NMEA 2000 Micro-C lead for a straightforward drop to the backbone
• Runs from the network at 9 to 16 V DC and draws 4 LEN for power budgeting
• 235 kHz sounding with a 12° beam and depth capability up to 180 m (590 ft)
• Retractable insert with an internal valve to reduce water flow when the insert is removed for cleaning
• No speed sensor connection

Compatibility and fit

This is the 0° version, so it matches a near-flat mounting surface where hull deadrise falls between 0° and 7°. If the chosen area has more deadrise than that, the beam will not be aimed straight down and the readings can suffer, especially at speed.

On the network side, it behaves like a standard NMEA 2000 depth and temperature device, so any compatible display or instrument that reads those PGNs can show the data. If your boat runs a 24 V house system, the NMEA 2000 backbone still needs the usual 12 V class supply (within 9 to 16 V DC).

Installation and setup

This sensor is a true through-hull fitting, so placement matters. Mount it where the water flow stays clean and free of bubbles, away from strakes, steps, intakes, and prop wash, and where you can reach the retaining nut and cable route inside the hull.

The retractable insert helps with service and seasonal cleaning. When growth builds up on the face, the insert can be removed and cleaned, and the valve in the housing limits water entering the boat during that short maintenance window.

Electrical and system integration

Connection is via the attached Micro-C lead into a standard NMEA 2000 T-connector on the backbone. Account for the 4 LEN draw in your network load calculation and make sure the backbone is properly powered and terminated so the depth and temperature data stays stable across the bus.

Use cases on board

This sensor is a practical match for boats that want depth and water temperature on the NMEA 2000 network without adding a separate temperature probe. It fits well on cruising and racing sailboats where depth is shared across instruments, and on fishing setups where water temperature is tracked alongside depth.

Maintenance and care

Like any thru-hull sensor, it will read best when the sensing face stays clean. Check it periodically for marine growth, and clean the insert as needed so depth returns stay consistent and temperature responds quickly. Inspect the through-hull area for leaks during routine bilge checks, especially after the first few trips following installation.

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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.

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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.

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