{"product_id":"starrett-49503-electronic-drop-indicator-4-inch-range","title":"Starrett 49503 Electronic Drop Indicator 4 Inch Range","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe STARRETT 49503 is an electronic drop indicator designed for precise dimensional measurement in machining, inspection, and metrology applications. It delivers a 4-inch measurement range with an accuracy of 0.0002 decimal inches (0.004 mm) and a resolution of 0.0001 decimal inches. Readings are displayed on a clear LCD screen, making it easy to read in both inch and metric units. The flat back design allows the indicator to mount flush against a surface plate, magnetic base, or fixture arm. It ships with two CR2032 3V lithium batteries included and is ready to use out of the box.\u003c\/p\u003e\u003cp\u003eThis indicator is suited for machine shop environments, quality control benches, and precision fabrication settings where a wide measurement range and high accuracy are required in a single instrument. The 4-inch range accommodates larger workpieces and deeper bore measurements that shorter-range indicators cannot handle. It is appropriate for use by machinists, metrology technicians, tool and die makers, and quality assurance personnel working in both production and job shop environments.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e4-inch (100 mm) measurement range for larger workpieces and deeper measurements\u003c\/li\u003e\n\u003cli\u003eAccuracy of 0.0002 decimal inches (0.004 mm) for reliable precision work\u003c\/li\u003e\n\u003cli\u003eResolution of 0.0001 decimal inches for fine incremental readings\u003c\/li\u003e\n\u003cli\u003eDual-unit LCD display reads in both inch and metric (mm) modes\u003c\/li\u003e\n\u003cli\u003eFlat back included for flush mounting on surface plates and fixture arms\u003c\/li\u003e\n\u003cli\u003eBattery-powered with two CR2032 3V lithium batteries included\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a drop-style electronic indicator compatible with standard indicator holders, magnetic bases, and fixture arms that accept a flat-back indicator body. Consult your mounting hardware specifications to confirm fitment before installation.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and setup is typically performed by machinists or metrology technicians. Mount the indicator securely in a compatible holder or magnetic base before taking measurements, ensuring the spindle axis is aligned perpendicular to the measurement surface to avoid cosine error. Do not overtighten the clamping collar against the indicator body, as this can affect spindle travel. Replace batteries when low-battery indication appears on the LCD to maintain measurement accuracy.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Measurement Range (Inch)\u003c\/strong\u003e: 4.0000 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Measurement Range (mm)\u003c\/strong\u003e: 100.00 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccuracy (Decimal Inch)\u003c\/strong\u003e: 0.0002 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccuracy (mm)\u003c\/strong\u003e: 0.004 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eResolution (Decimal Inch)\u003c\/strong\u003e: 0.0001 inches\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 — (2) CR2032 3V Lithium\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Dimensions\u003c\/strong\u003e: 14 inches L x 5.5 inches W x 3.25 inches H\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1.25 pounds\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: 49503\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51538926305586,"sku":"49503","price":1805.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/1d93ef80a575ec30615a80638bc89fba.jpg?v=1785829878","url":"https:\/\/voomisupply.com\/products\/starrett-49503-electronic-drop-indicator-4-inch-range","provider":"Voomi Supply","version":"1.0","type":"link"}