{"product_id":"blue-sea-100a-50ma-ac-current-sensing-coil-for-ac-ammeters","title":"Blue Sea 100A\/50mA AC Current Sensing Coil for AC Ammeters","description":"\u003ch2\u003ePrecision Non-Contact AC Current Measurement for Marine and Off-Grid Power Systems\u003c\/h2\u003e\n\u003cp\u003eMonitoring high-amperage Alternating Current (AC) loads requires safe, accurate, and reliable hardware. The Blue Sea Systems 100A\/50mA AC Current Sensing Coil acts as a specialised current transformer, stepping down a primary load of up to 100A into a safe, proportional 50mA secondary signal. This allows compatible AC ammeters and digital power monitors to accurately track system load without routing heavy-gauge, high-voltage AC conductors directly to the instrument panel.\u003c\/p\u003e\n\u003cp\u003eEngineered for demanding environments, this sensing coil is widely used in marine electrical systems, RV shore power setups, and off-grid inverter\/charger installations. By isolating the monitoring display from the primary AC circuit, it significantly reduces installation complexity and mitigates electrical hazards behind the helm or control board.\u003c\/p\u003e\n\n\u003ch3\u003eSafe Toroidal Design and Simplified Installation\u003c\/h3\u003e\n\u003cp\u003eUnlike DC shunts that require cutting cables and bolting heavy lugs in-line, this AC current transformer utilises a closed-loop toroidal (ring) architecture for non-contact induction measurement. Installers simply pass the primary AC hot conductor through the centre aperture of the coil. As alternating current flows through the main cable, the coil induces a proportional 50mA current at full 100A scale, which travels through the integrated secondary wire leads directly to the AC ammeter.\u003c\/p\u003e\n\u003cp\u003eThis non-intrusive method eliminates extra termination points in your primary high-load wiring, removing potential points of high resistance, voltage drop, and heat build-up.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features and Benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e100A to 50mA Sensing Ratio:\u003c\/strong\u003e Provides linear signal scaling for compatible analogue and digital AC ammeters requiring a 50mA full-scale input.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNon-Contact Toroidal Architecture:\u003c\/strong\u003e Measures alternating current via electromagnetic induction, eliminating the need to splice into primary AC supply cables.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEncapsulated Marine-Grade Housing:\u003c\/strong\u003e Protects the internal windings from moisture, vibration, and corrosion in harsh marine and mobile environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated Secondary Leads:\u003c\/strong\u003e Supplied with factory-attached flying leads for straightforward termination to the rear of your monitoring gauge.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Panel Safety:\u003c\/strong\u003e Keeps high-voltage, high-current AC mains cabling safely inside the main distribution enclosure rather than behind the dashboard.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eBuilt for Reliability in Demanding Environments\u003c\/h3\u003e\n\u003cp\u003eStandard industrial current transformers often struggle with the constant vibration and damp conditions found in boats and recreational vehicles. Blue Sea Systems addresses these challenges with a fully encapsulated housing that shields the internal transformer core from salt mist, humidity, and mechanical shock. Using a properly matched, marine-grade sensing coil prevents inaccurate load readings that could otherwise lead to tripped shore power breakers or overloaded inverters.\u003c\/p\u003e\n\n\u003ch3\u003eTypical Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMonitoring AC shore power incoming loads on marine vessels and motorhomes\u003c\/li\u003e\n\u003cli\u003eTracking output amperage from onboard marine generators and off-grid AC inverters\u003c\/li\u003e\n\u003cli\u003eReplacing or upgrading sensing coils for Blue Sea Systems analogue and digital AC ammeter panels\u003c\/li\u003e\n\u003cli\u003eCustom AC distribution switchboards requiring compact, isolated current measurement\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eUpgrade Your AC Power Monitoring\u003c\/h3\u003e\n\u003cp\u003eEnsure accurate load management and a safer switchboard layout in your vessel, caravan, or off-grid system. Add the Blue Sea Systems 100A\/50mA AC Current Sensing Coil to your electrical setup for dependable, non-contact current measurement.\u003c\/p\u003e","brand":"Blue Sea","offers":[{"title":"Default Title","offer_id":43631773253693,"sku":"BS-8257B","price":52.51,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0602\/3918\/3933\/files\/ac-current-sensing-coil-100a-50ma-bs-8257b.png?v=1792903723","url":"https:\/\/www.solar4rvs.com.au\/products\/blue-sea-100a-50ma-ac-current-sensing-coil-for-ac-ammeters","provider":"Solar 4 RVs","version":"1.0","type":"link"}