Blue Sea Systems DC Zero Center Analog Ammeter with Shunt, 2.75in Face, 50mV External Shunt, Backlit Meter Face

Overview

The Blue Sea Systems DC Zero Center Analog Ammeter is a panel-mounted DC current meter for monitoring charge and discharge current on a boat battery or DC distribution system. Its zero-center scale lets the needle move in either direction, so the operator can see whether current is flowing into the battery bank from charging equipment or out of the bank to onboard loads.

This analog ammeter uses an external 50 mV shunt and a 2.75 in (69.85 mm) meter face. The meter draws its sensing power from the shunt connection, while the backlit face uses separate 12V or 24V DC backlight connections with low current draw of 16 mA at 12V DC or 20 mA at 24V DC.

It suits helm stations, DC electrical panels, battery switch areas, and nav stations where a simple visual current reference is easier to read at a glance than a digital display. The included shunt keeps the high-current cable run at the shunt location, leaving the meter to be wired as a remote display in the panel.

Key features

• Zero-center analog scale reads both discharge and charge current on DC systems.
• 2.75 in (69.85 mm) face size fits common marine electrical panel layouts.
• External shunt setup uses a 50 mV full-scale signal for remote current measurement.
• Meter senses and powers itself from the shunt connection, with separate wiring only for the optional backlight.
• Backlit face supports 12V or 24V DC backlight circuits for easier viewing in low light.
• Available in 50-0-50A and 100-0-100A ranges to match different DC load and charging profiles.
• Includes the matching DC shunt for the selected amperage range.

Variants

This ammeter is offered in two current ranges. Both variants use the same 2.75 in face format, zero-center DC display style, external 50 mV shunt type, and 12V or 24V DC backlight connection.

The amperage range and included shunt change by variant, so the selected version should match the expected current flow in the circuit being monitored.

• 8252: 50-0-50A amperage range. This range is suited to lower-current DC circuits or smaller battery systems where charge and discharge current normally stays within a 50A scale.
• 8253: 100-0-100A amperage range. This range gives more scale capacity for larger DC loads, higher-output charging sources, or battery systems that can see current movement above 50A.

Installation and setup

The shunt should be installed in the monitored DC circuit where it can safely measure current flow, while the meter face can be mounted in a visible panel location. This layout is useful on boats because the heavy current path can remain near the battery or distribution equipment instead of being routed through the instrument panel.

For the zero-center reading to make sense, shunt orientation and meter wiring should follow the intended charge and discharge direction. The backlight can be tied into the vessel lighting circuit when night readability is needed at the helm, nav station, or electrical panel.

Compatibility and fit

This product is for DC current monitoring and is not a replacement for a battery monitor that calculates state of charge, amp-hours, or battery history. It is a good match for boat owners who want a direct analog view of current flow from alternators, chargers, solar charging equipment, or onboard DC loads.

What’s included

• DC zero center analog ammeter
• Matching DC shunt for the selected amperage range

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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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