{"product_id":"jefferson-voltage-magnetic-field-tester-electrical-testing-pen","title":"Jefferson Voltage \u0026 Magnetic Field Tester Electrical Testing Pen","description":"\u003ch4\u003e\u003cb\u003eDetails and Diagnostic Benefits of the Jefferson Voltage \u0026amp; Magnetic Field Tester\u003c\/b\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eDual-Action Detection:\u003c\/b\u003e Senses both live AC voltages and electromagnetic fields in a single compact unit, allowing you to check cables, switches, and solenoids with one hand tool.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eNon-Contact Testing Safety:\u003c\/b\u003e Detects electrical potential through wire insulation without touching bare copper conductors, keeping you protected against accidental shock risks during initial site inspections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMagnetic Field Verification:\u003c\/b\u003e Identifies active magnetic coils on hydraulic valves, relays, and pneumatic actuators instantly, confirming whether a component is energised without stripping down fittings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eClear LED and Audio Alerts:\u003c\/b\u003e Features a high-visibility illumination tip combined with a clear buzzer tone, providing positive confirmation even in noisy machine rooms and dimly lit workshops.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eIntegrated Pen Clip:\u003c\/b\u003e Fastens firmly onto breast pockets, overalls, or tool belts, ensuring the unit is always to hand when you step up to an electrical enclosure or boiler cabinet.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eHard-Wearing Insulated Body:\u003c\/b\u003e Built from tough non-conductive plastic designed to withstand workshop knocks, grease exposure, and daily service van travel.\u003c\/li\u003e\n\u003cli\u003eDesigned for indoor use\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Jefferson Tools","offers":[{"title":"Default Title","offer_id":59081815196031,"sku":"JF-JEFVOLTST02","price":19.79,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0305\/7713\/1659\/files\/JEFVOLTST02-800x800.jpg?v=1793783570","url":"https:\/\/www.sam-turner.co.uk\/products\/jefferson-voltage-magnetic-field-tester-electrical-testing-pen","provider":"Sam Turner \u0026 Sons","version":"1.0","type":"link"}