{"product_id":"starrett-49509-electronic-drop-indicator-1-inch","title":"Starrett 49509 Electronic Drop Indicator 1 Inch","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe STARRETT 49509 is an electronic drop indicator with a 1-inch maximum measurement range, designed for precision dimensional gauging in machining, toolroom, and quality control environments. The LCD display provides clear numeric readout in both inch and metric units. Accuracy is rated at 0.0001 inch (0.0020 mm), with selectable resolution down to 0.00005 inch. The flat back design allows the indicator to seat flush against magnetic bases and surface plates without rocking. Two lithium CR2032 batteries are included. This instrument is used by machinists, tool and die technicians, and metrology personnel who need reliable, repeatable contact measurement on machined surfaces, fixtures, and assemblies.\u003c\/p\u003e\n\u003cp\u003eThe 49509 is suited for setup and inspection tasks in precision manufacturing, job shops, and quality labs. The 3\/8-inch stem diameter fits standard indicator holders, clamps, and magnetic base arms commonly found in machine shop and inspection environments. Both inch and metric modes make it adaptable across mixed-standard workflows. The selectable resolution settings allow the user to match display sensitivity to the task, from coarse runout checks to fine surface comparison work.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e1-inch measurement range with 0.0001-inch accuracy\u003c\/li\u003e\n  \u003cli\u003eLCD display with selectable inch and metric readout\u003c\/li\u003e\n  \u003cli\u003eMultiple resolution settings: 0.00005, 0.0001, 0.0005, and 0.001 inch\u003c\/li\u003e\n  \u003cli\u003eFlat back included for stable mounting on surface plates and magnetic bases\u003c\/li\u003e\n  \u003cli\u003e3\/8-inch stem diameter fits standard indicator holders\u003c\/li\u003e\n  \u003cli\u003eIncludes two lithium CR2032 3V batteries — ready to use out of the box\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use with standard 3\/8-inch stem indicator holders, magnetic bases, and surface plate fixtures common in toolroom and quality control applications.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eMounting is performed by securing the 3\/8-inch stem in the collet or clamp of a compatible indicator holder or magnetic base arm. Ensure the contact point is perpendicular to the measured surface to avoid cosine error that reduces reading accuracy. Zero the display after positioning before taking measurements. Battery replacement requires a CR2032 coin cell — do not short or dispose of lithium cells in general waste.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Measurement Range (Inch)\u003c\/strong\u003e: 1.0000 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Measurement (mm)\u003c\/strong\u003e: 25.00 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAccuracy (Decimal Inch)\u003c\/strong\u003e: 0.0001 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAccuracy (mm)\u003c\/strong\u003e: 0.0020 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eResolution (Decimal Inch)\u003c\/strong\u003e: 0.00005, 0.0001, 0.0005, 0.001 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eResolution (mm)\u003c\/strong\u003e: 0.001, 0.002, 0.01, 0.02 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStem Diameter\u003c\/strong\u003e: 0.3750 inch (3\/8 inch)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBack Type\u003c\/strong\u003e: Flat\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDisplay Type\u003c\/strong\u003e: LCD\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUnit of Measure\u003c\/strong\u003e: Inch and Metric\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePower Source\u003c\/strong\u003e: Battery\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBatteries Included\u003c\/strong\u003e: Yes — (2) Lithium CR2032 3V\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Dimensions\u003c\/strong\u003e: 6.5 inches L x 5.5 inches W x 3.25 inches H\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1 pound\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: STARRETT\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 49509\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51540150681906,"sku":"49509","price":785.01,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/7eef6e3f898899da0f902fd993cab67f.jpg?v=1785847202","url":"https:\/\/voomisupply.com\/products\/starrett-49509-electronic-drop-indicator-1-inch","provider":"Voomi Supply","version":"1.0","type":"link"}