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Blue Sea 50A 50mV DC Shunt
Blue Sea 50A 50mV DC Shunt
Brass Terminals & Insulating Base for Ammeters (33A Continuous)
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DESCRIPTION
Precision DC Current Measurement for Marine and Off-Grid Electrical Systems
Accurate battery monitoring and load tracking are vital for maintaining the health and efficiency of any off-grid, caravan, or marine power setup. The Blue Sea 50A/50mV DC Shunt is engineered to work seamlessly with compatible analogue and digital DC ammeters, providing a highly calibrated voltage drop to measure real-time current flow. By diverting the heavy main load away from your sensitive dashboard gauges, this external shunt allows you to safely monitor charge and discharge currents without routing thick, high-amperage battery cables directly behind your instrument panel.
Engineered for Safety, Isolation, and Accuracy
Unlike unbranded alternatives that often lack proper thermal management or mounting security, this Blue Sea Systems component comes complete with an integrated black insulating base. This robust plastic base ensures secure electrical isolation when mounting the shunt onto conductive metal surfaces, bulkheads, or inside compact battery enclosures. It significantly reduces the risk of accidental short circuits while simplifying installation in tight spaces.
At the heart of the unit is a calibrated metal resistive element set between two heavy-duty brass terminal blocks. As current flows through the main load terminals, the resistive strip generates a proportional millivolt signal (1mV per 1A of current, reaching a 50mV drop at the full 50A rating). Your DC ammeter reads this precise signal via the dedicated sensing terminals, translating it into an accurate amperage reading on your display.
Key Features and Construction
- Calibrated 50A/50mV Ratio: Delivers a linear 50mV full-scale signal designed to pair effortlessly with compatible 50mV DC ammeters and battery monitors.
- Integrated Insulating Base: Features a durable black plastic mounting base that provides essential electrical isolation and mechanical stability on any flat surface.
- Heavy-Duty Brass Load Terminals: Equipped with robust hex bolts to secure main battery or load cables, ensuring low contact resistance and minimal heat build-up.
- Dedicated Sensing Screws: Includes separate Phillips head screws on top of the terminal blocks for quick, secure attachment of small-gauge ammeter voltage sensing leads.
- Clear Rating Identification: Marked clearly with its electrical specifications for straightforward system verification and meter pairing during installation or maintenance.
Continuous Operation and Thermal Management Guidance
To ensure long-term accuracy and prevent excessive thermal drift, it is important to size your shunt appropriately for your expected electrical loads. While this unit is rated for intermittent currents up to 50A, Blue Sea Systems recommends that continuous operation under normal conditions should not exceed two-thirds (66%) of the rated current, which equates to approximately 33A. Adhering to this continuous-use threshold prevents overheating of the resistive element, maintains measurement linearity, and protects surrounding wiring and terminals from heat stress.
Ideal Applications
This compact current shunt is well suited for a wide variety of low-to-medium amperage DC monitoring tasks across 12V, 24V, and 48V systems (when paired with an appropriately rated meter), including:
- Monitoring solar charge controller output in caravan, camper trailer, and 4WD dual-battery setups.
- Tracking specific DC branch circuits, such as refrigeration, lighting, or water pump loads on marine vessels.
- Replacing damaged or uncalibrated shunts in existing analogue or digital panel meter installations.
- Bench testing and DIY electrical diagnostics where safe, isolated current measurement is required.
Upgrade Your Electrical Monitoring Setup
Ensure reliable, safe, and accurate current tracking across your auxiliary power system. Add the Blue Sea 50A/50mV DC Shunt to your kit today for a professional-grade metering installation.
SKU: BS-9228B
SPECIFICATIONS
| Specification | Value |
|---|---|
| Rated current | 50A |
| Rated millivolt drop | 50mV |
| Application | For use with DC ammeters |
| Continuous operation recommendation | Under normal conditions, do not operate above two-thirds (66%) of the rated current |
| SKU: | BS-9228B |
| Model #: | BS-9228B |
| MPN: | BS-9228B |
| Package weight: | 0.18 kg |
| Package length: | 0.12 m |
| Package width: | 0.08 m |
| Package height: | 0.05 m |
WARRANTY
Blue Sea Warranty Policy
Blue Sea Systems products sold by us are supplied with a warranty against defects for the warranty period shown below, subject to the product type, application and the terms of this warranty policy.
The express warranty provided by us is limited to a maximum of 5 years from the original date of purchase, unless otherwise required under Australian Consumer Law.
Blue Sea Systems may offer longer manufacturer support on some products at their discretion
Warranty Lengths by Product Range
| Blue Sea Product Range | Warranty Length | Application / Notes |
|---|---|---|
| Most Blue Sea Systems Products | 5 years | Applies to most Blue Sea Systems products found to be defective in materials or manufacture. |
| P12 Battery Chargers | 5 years | Warranty period starts from the original date of purchase. |
| P12 Remote Displays | 5 years | Warranty period starts from the original date of purchase. |
| Digital Meters | 3 years | Warranty period starts from the original date of purchase. |
| Vessel System Monitors | 3 years | Warranty period starts from the original date of purchase. |
Warranty Assessment and Remedy
If a Blue Sea Systems product is found to be defective in materials or manufacture within the applicable warranty period, we will, at our discretion, arrange a repair, replacement, store credit or refund, depending on the nature of the fault and the requirements of Australian Consumer Law.
Products may need to be returned for assessment before a warranty claim can be approved. Where required, the product must be returned with dated proof of purchase and a clear description of the fault.
Labour costs for removing, replacing, reinstalling or diagnosing a product are not covered by this express warranty unless otherwise required under Australian Consumer Law.
Making a Warranty Claim
To make a warranty claim, please contact us with your dated proof of purchase, product details and a description of the fault.
The product may need to be returned for inspection before the claim can be assessed. If the product is confirmed to be faulty and covered by this warranty, we will advise the available remedy.
What This Warranty Does Not Cover
This warranty does not cover faults or damage caused by incorrect installation, incorrect application, misuse, abuse, neglect, unauthorised modification, accidental damage, normal wear and tear, environmental damage, or failure to use the product in accordance with the manufacturer's instructions.
- Incorrect installation or wiring
- Incorrect product selection or application
- Misuse, abuse or neglect
- Physical or accidental damage
- Water ingress or environmental damage outside the product's intended use
- Unauthorised modification or repair
- Normal wear and tear
- Labour costs for removal, replacement, reinstallation or diagnosis
- Freight, travel or call-out costs unless otherwise required by law
- Products not returned for assessment when reasonably required
Manufacturer Support
Blue Sea Systems may provide additional manufacturer support on some products beyond the warranty period listed above. Where available, we may assist customers in contacting the manufacturer, but any manufacturer support beyond the express warranty period is subject to the manufacturer's own terms and continued availability.
Australian Consumer Law
This warranty is in addition to other rights and remedies available at law. Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a replacement or refund for a major failure and compensation for any other reasonably foreseeable loss or damage. You are also entitled to have the goods repaired or replaced if the goods fail to be of acceptable quality and the failure does not amount to a major failure.
DOCUMENTS
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