{"product_id":"spi-11-983-4-digital-protractor-magnetic-base","title":"Spi 11-983-4 Digital Protractor Magnetic Base","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SPI 11-983-4 is a magnetic base digital protractor designed for precise angle measurement in trade and industrial applications. It measures angles from 0 to 90 degrees with a resolution of 0.05 degrees and an accuracy of 0.2 degrees, making it suitable for work that demands reliable angular readings. The integrated magnetic base allows the unit to attach securely to ferrous surfaces, keeping hands free during measurement. A 9V battery is included. This instrument is commonly used by machinists, pipefitters, HVAC technicians, millwrights, and other trade professionals who require accurate angle verification during fabrication, installation, or alignment work.\u003c\/p\u003e\n\u003cp\u003eThe 11-983-4 is well suited for layout and verification tasks in both shop and field environments. Its compact footprint — 2.2 inches in length, 2.2 inches in width, and 1.2 inches in height — allows use in tight spaces where larger instruments cannot fit. The magnetic base makes it practical for attaching to ductwork, pipe, structural steel, and machined surfaces. It is appropriate for both residential and light commercial trade applications wherever precise angle confirmation is required.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e0 to 90 degree measuring range with 0.05 degree resolution\u003c\/li\u003e\n  \u003cli\u003eAccuracy rated at 0.2 degrees\u003c\/li\u003e\n  \u003cli\u003eIntegrated magnetic base for hands-free attachment to ferrous surfaces\u003c\/li\u003e\n  \u003cli\u003eDigital readout for fast, unambiguous angle readings\u003c\/li\u003e\n  \u003cli\u003eLow battery warning indicator\u003c\/li\u003e\n  \u003cli\u003e9V battery included — ready to use out of the box\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for general-purpose angle measurement tasks on ferrous surfaces in trade, industrial, and fabrication settings.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThis instrument does not require installation but should be handled and stored in accordance with manufacturer guidelines to preserve calibration accuracy. Before use, ensure the magnetic base and the mounting surface are clean and free of debris to achieve a secure, level connection. If used in environments with strong electromagnetic fields, verify readings against a secondary reference. Calibration should be checked periodically according to your shop or job-site quality standards.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMeasuring Range\u003c\/strong\u003e: 0 to 90 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eResolution\u003c\/strong\u003e: 0.05 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAccuracy\u003c\/strong\u003e: 0.2 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMagnetic Base\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBattery Type\u003c\/strong\u003e: 9V\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBatteries Included\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLow Battery Warning\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength\u003c\/strong\u003e: 1.2 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 2.2 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight\u003c\/strong\u003e: 2.2 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.2 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: SPI\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 11-983-4\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SPIROTHERM","offers":[{"title":"Default Title","offer_id":51723880825138,"sku":"11-983-4","price":94.16,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/9d334f82edaa689dfa85097452297ea3.jpg?v=1788609262","url":"https:\/\/voomisupply.com\/products\/spi-11-983-4-digital-protractor-magnetic-base","provider":"Voomi Supply","version":"1.0","type":"link"}