Garmin B275LH-W Bronze Thru-Hull CHIRP Transducer, 1 kW, 42-65/150-250 kHz, 25° Wide Beam, 12-Pin, Temp Sensor, With Fairing

Overview

The Garmin 010-12183-20 is a 1 kW bronze thru-hull CHIRP transducer with a 12-pin plug, covering CHIRP Low 42-65 kHz and CHIRP High 150-250 kHz.

The high band holds a constant 25° beam across 150-250 kHz, so you see a wider slice of bottom and water column without having to run tight passes over a mark. Low band is rated down to 914 m (3,000 ft) and the high wide band is rated down to 152 m (500 ft), depending on conditions.

It is specified for fiberglass or wood hulls on boats 8 m (25 ft) and up, and it installs through a 30 mm (1-3/16") hull hole with a high-performance fairing that helps keep the element in clean flow at speed.

Key features

• 1 kW CHIRP Low (42-65 kHz) plus CHIRP High (150-250 kHz) in one thru-hull transducer.
• High wide beam stays at 25° across the full 150-250 kHz range for steady coverage under the boat.
• Depth rating up to 914 m (3,000 ft) on low band and up to 152 m (500 ft) on the high wide band.
• Depth and water-temperature sensing (no paddlewheel speed sensor).
• Bronze thru-hull housing with a high-performance fairing that supports broadband readings at speeds over 30 knots when the install is in solid water.
• 30 mm (1-3/16") thru-hull hole requirement, usable shaft length 121 mm (4.75"), and deadrise support up to 20° with the fairing.
• 12-pin Garmin connector for direct connection to compatible Garmin CHIRP sonar ports.

What's included

• Bronze thru-hull transducer with attached 12-pin cable
• High-performance fairing

Compatibility and fit

This is the B275LHW (often listed as B275LH-W) style transducer with an OEM Garmin 12-pin connector. It requires a Garmin sonar device or sonar module that accepts a 12-pin transducer and supports CHIRP on both the low and high bands.

The bronze housing is specified for fiberglass or wood hulls. On aluminum hulls, a different housing material is commonly used to avoid galvanic issues at the thru-hull.

Installation and setup

A thru-hull install needs access to both sides of the hull for drilling, bedding, and tightening the stem. The fairing is shaped to match the hull and aligned so water flows smoothly past the acoustic window.

Most installs work best when the transducer is placed where the water stays solid and free of bubbles when running, away from strakes, intakes, and other fittings that introduce aeration. The fairing work matters on this style of transducer, so many owners have a yard or installer handle the cutout and final shaping.

Use cases on board

The wide high band suits anglers who want to cover more area under the boat while tracking bait and fish over reefs, wrecks, and open-water structure. The low band supports deeper drops when you run offshore or fish along the edge in several hundred feet and beyond.

Maintenance and care

Inspect the stem nut and bedding periodically, especially after the first trips and after haul-outs. Keep growth off the fairing and acoustic window, and avoid scraping that can gouge the urethane face.

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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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