{"product_id":"starrett-49501-electronic-drop-indicator-1-inch-range","title":"Starrett 49501 Electronic Drop Indicator 1 Inch Range","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe STARRETT 49501 is an electronic drop indicator designed for precision dimensional measurement in machine shops, fabrication environments, and maintenance settings. It delivers a measurement range of 1 inch with an accuracy of 0.0001 inches and a resolution of 0.00005 inches, making it suitable for surface variation checks, runout measurements, and part inspection tasks. The unit features an LCD display for clear readout and ships with a flat back included. Power comes from two CR2032 3V lithium batteries, which are included. Installation and setup require no special trade licensing, but the instrument is commonly used by machinists, tool-and-die workers, and precision maintenance technicians.\u003c\/p\u003e\u003cp\u003eThe STARRETT 49501 is used in applications where electronic readout is preferred over dial-type indicators. Typical use cases include checking shaft runout, surface flatness, and part-to-part variation on milling machines, lathes, surface plates, and inspection fixtures. The flat back design allows the indicator to be mounted in standard dovetail holders and magnetic base assemblies. Dual-unit readout supports both inch and metric measurements, making it adaptable to mixed-standard workflows in manufacturing and maintenance environments.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e1 inch measurement range with 0.0001 inch accuracy and 0.00005 inch resolution\u003c\/li\u003e\n\u003cli\u003eLCD display provides clear digital readout in inch or metric units\u003c\/li\u003e\n\u003cli\u003eFlat back included for compatibility with standard dovetail-style holders\u003c\/li\u003e\n\u003cli\u003ePowered by two CR2032 3V lithium batteries, included in the package\u003c\/li\u003e\n\u003cli\u003eDual-unit display supports both decimal inch and millimeter readout\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style drop indicator for use with standard dovetail mounting holders and magnetic base indicator arms commonly used in machine shop and maintenance inspection setups.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThe STARRETT 49501 is mounted by a licensed machinist or precision maintenance technician using a dovetail holder or equivalent clamping fixture. Ensure the mounting arm and contact point are secure before taking measurements to avoid false readings. Replace batteries when the low-battery indicator activates to maintain measurement accuracy. Handle the stem and contact point with care to avoid damage that could affect calibration.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasurement Range (Inch)\u003c\/strong\u003e: 1 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccuracy (Decimal Inch)\u003c\/strong\u003e: 0.0001 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eResolution (Decimal Inch)\u003c\/strong\u003e: 0.00005 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccuracy (mm)\u003c\/strong\u003e: 0.002 mm\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\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\u003eBack Type\u003c\/strong\u003e: Flat\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, 2x CR2032 3V Lithium\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStem Diameter\u003c\/strong\u003e: 0.38 mm\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\u003ch4\u003eStandard Information\u003c\/h4\u003e\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: 49501\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51539077005618,"sku":"49501","price":827.4,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/ac8a6bca0ed5ec346a2f29fd520bf4df.jpg?v=1785834500","url":"https:\/\/voomisupply.com\/products\/starrett-49501-electronic-drop-indicator-1-inch-range","provider":"Voomi Supply","version":"1.0","type":"link"}