{"product_id":"rf-guru-9cm-ruler","title":"RF.Guru 9 cm Electronics Bench Ruler","description":"\u003cdiv class=\"rf-product rf-guru\"\u003e\n  \u003cstyle scoped\u003e\n    .rf-product.rf-guru {\n      color: #222;\n      font-size: 16px !important;\n      line-height: 1.65 !important;\n    }\n    .rf-product.rf-guru h2,\n    .rf-product.rf-guru h3,\n    .rf-product.rf-guru h4 {\n      font-weight: 700 !important;\n      line-height: 1.3 !important;\n      margin-top: 1.2em !important;\n      margin-bottom: 0.45em !important;\n    }\n    .rf-product.rf-guru h2 { font-size: 1.65em !important; }\n    .rf-product.rf-guru h3 { font-size: 1.28em !important; }\n    .rf-product.rf-guru h4 { font-size: 1.1em !important; }\n\n    .rf-product.rf-guru p,\n    .rf-product.rf-guru li,\n    .rf-product.rf-guru td,\n    .rf-product.rf-guru th {\n      font-size: 1.02em !important;\n      line-height: 1.65 !important;\n    }\n\n    .rf-product.rf-guru p { margin-bottom: 0.9em !important; }\n    .rf-product.rf-guru ul {\n      margin: 0.4em 0 0.9em 1.2em !important;\n      padding: 0 !important;\n    }\n    .rf-product.rf-guru ul li {\n      margin-bottom: 0.4em !important;\n    }\n\n    .rf-product.rf-guru .inline-note {\n      color: #8a8a8a;\n      font-style: italic;\n      display: block;\n      margin-top: 0.3em;\n    }\n\n    .rf-product.rf-guru .complementary-note {\n      background: #f3f3f3;\n      border: 1px solid #d9d9d9;\n      border-radius: 6px;\n      padding: 0.9em;\n      margin: 1.2em 0;\n    }\n\n    .rf-product.rf-guru .related-reading {\n      background: #fff8e5;\n      border: 1px solid #f0d78c;\n      border-radius: 6px;\n      padding: 0.9em;\n      margin: 1.3em 0;\n    }\n    .rf-product.rf-guru .related-reading b {\n      color: #b26d00;\n    }\n    .rf-product.rf-guru .related-reading .rr-link {\n      display: block;\n      margin-top: 0.45em;\n      text-decoration: underline;\n    }\n\n    .rf-product.rf-guru .tech-box {\n      background: #eef6fb;\n      border: 1px solid #c6d9e8;\n      border-radius: 6px;\n      padding: 1em;\n      margin: 1.4em 0;\n      font-size: 0.98em;\n      line-height: 1.6em;\n    }\n\n    .rf-product.rf-guru .specs-table {\n      width: 100%;\n      border-collapse: collapse;\n      margin: 0.9em 0 1.1em 0;\n    }\n    .rf-product.rf-guru .specs-table th,\n    .rf-product.rf-guru .specs-table td {\n      border: 1px solid #ddd;\n      padding: 8px 10px;\n      text-align: left;\n      vertical-align: top;\n    }\n    .rf-product.rf-guru .specs-table thead th {\n      background: #f7f7f7;\n    }\n\n    .rf-product.rf-guru .rf-figure {\n      margin: 1.2em 0 1.4em 0;\n      text-align: center;\n    }\n    .rf-product.rf-guru .rf-figure img {\n      max-width: 100%;\n      height: auto;\n      border-radius: 10px;\n      display: inline-block;\n    }\n\n    .rf-product.rf-guru .mini-faq {\n      background: #f9f9f9;\n      border: 1px solid #ddd;\n      border-radius: 6px;\n      padding: 1em;\n      margin-top: 2em;\n    }\n    .rf-product.rf-guru .mini-faq h3 {\n      margin-top: 0 !important;\n    }\n    .rf-product.rf-guru .mini-faq ul {\n      list-style: none;\n      padding-left: 0 !important;\n      margin: 0 !important;\n    }\n    .rf-product.rf-guru .mini-faq li {\n      margin-bottom: 0.7em !important;\n    }\n    .rf-product.rf-guru .mini-faq li b {\n      margin-right: 0.3em;\n    }\n\n    .rf-product.rf-guru .author-bio {\n      border-left: 4px solid #ccc;\n      padding-left: 0.8em;\n      margin-top: 1.5em;\n      margin-bottom: 0.5em;\n      font-style: normal;\n      font-size: 0.95em !important;\n      line-height: 1.45em !important;\n    }\n    .rf-product.rf-guru .author-bio b,\n    .rf-product.rf-guru .author-bio b a {\n      font-weight: 700;\n      text-decoration: none;\n    }\n\n    @media (max-width: 768px) {\n      .rf-product.rf-guru h2 { font-size: 1.45em !important; }\n      .rf-product.rf-guru h3 { font-size: 1.18em !important; }\n      .rf-product.rf-guru p,\n      .rf-product.rf-guru li,\n      .rf-product.rf-guru td,\n      .rf-product.rf-guru th {\n        font-size: 1em !important;\n      }\n      .rf-product.rf-guru ul li {\n        margin-bottom: 0.35em !important;\n      }\n    }\n  \u003c\/style\u003e\n\n  \u003cp\u003e\n    A compact 9 cm bench ruler for electronics work, measurement checks, and quick visual reference at the workbench. The RF.Guru ruler combines a clear metric scale with practical PCB and component reference guides, making it a useful little tool for soldering, prototyping, and bench-side troubleshooting.\n  \u003c\/p\u003e\n\n  \u003cdiv class=\"complementary-note\"\u003e\n    \u003cb\u003eSmall tool, real bench value:\u003c\/b\u003e This is the kind of ruler you keep next to the soldering iron, microscope, or PCB holder because it does more than measure length. It also gives you quick visual references for SMD sizes, widths, hole diameters, and common semiconductor symbols.\n  \u003c\/div\u003e\n\n  \u003ch3\u003e\u003cb\u003eWhat It Is\u003c\/b\u003e\u003c\/h3\u003e\n  \u003cp\u003e\n    The RF.Guru 9 cm ruler is a compact electronics ruler designed for the bench, toolbox, or field kit. It gives you a straightforward 0 to 9 cm metric scale while also serving as a fast visual reference for common SMD package sizes, width gauges, hole diameters, and basic transistor, MOSFET, and diode orientation reminders.\n  \u003c\/p\u003e\n\n  \u003ch3\u003e\u003cb\u003eWhy It Is Useful\u003c\/b\u003e\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eQuickly measure small parts, spacing, and board dimensions\u003c\/li\u003e\n    \u003cli\u003eCheck common SMD package sizes at a glance\u003c\/li\u003e\n    \u003cli\u003eCompare drill or hole diameters visually\u003c\/li\u003e\n    \u003cli\u003eUse the width references during layout, prototyping, or inspection\u003c\/li\u003e\n    \u003cli\u003eKeep basic semiconductor symbol orientation hints right on the bench\u003c\/li\u003e\n    \u003cli\u003eCompact enough to leave next to the soldering station full-time\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003cfigure class=\"rf-figure\"\u003e\n    \u003cimg src=\"REPLACE-WITH-YOUR-SHOPIFY-FILES-URL\/2022-M-001-F-B.webp\" alt=\"RF.Guru 9 cm electronics bench ruler front and back view\" loading=\"lazy\"\u003e\n    \u003cspan class=\"inline-note\"\u003eFront view shows the measurement and reference side. The rear side carries RF.Guru branding and artwork.\u003c\/span\u003e\n  \u003c\/figure\u003e\n\n  \u003ch3\u003e\u003cb\u003eFront-Side Reference Features\u003c\/b\u003e\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e0 to 9 cm metric ruler scale\u003c\/li\u003e\n    \u003cli\u003eSMD package size reference including common small packages such as 0201, 0402, 0603, 0805, and 1206\u003c\/li\u003e\n    \u003cli\u003eWidth gauge reference from very fine widths up to larger bench-friendly values\u003c\/li\u003e\n    \u003cli\u003eHole diameter comparison points for common small drill and lead sizes\u003c\/li\u003e\n    \u003cli\u003eQuick symbol reminders for bipolar transistors, MOSFETs, and diode orientation\u003c\/li\u003e\n    \u003cli\u003eHandy current-versus-width style reference for quick bench-side comparison\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003cdiv class=\"tech-box\"\u003e\n    \u003cb\u003eBench note:\u003c\/b\u003e This ruler is meant as a fast practical reference, not as a substitute for calipers or detailed design calculation. It is ideal for quick sanity checks while placing components, inspecting assembled boards, or comparing package sizes under normal bench conditions.\n  \u003c\/div\u003e\n\n  \u003ch3\u003e\u003cb\u003eSpecs at a Glance\u003c\/b\u003e\u003c\/h3\u003e\n  \u003ctable class=\"specs-table\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eFeature\u003c\/th\u003e\n        \u003cth\u003eDetails\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eLength Scale\u003c\/td\u003e\n        \u003ctd\u003e0 to 9 cm metric ruler\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003ePrimary Use\u003c\/td\u003e\n        \u003ctd\u003eBench ruler and quick electronics reference tool\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eReference Aids\u003c\/td\u003e\n        \u003ctd\u003eSMD package sizes, width references, hole sizes, and common semiconductor symbol reminders\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eFormat\u003c\/td\u003e\n        \u003ctd\u003eCompact, flat, pocket-size bench accessory\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eBranding\u003c\/td\u003e\n        \u003ctd\u003eRF.Guru front and rear graphics\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eTypical Users\u003c\/td\u003e\n        \u003ctd\u003eMakers, hams, PCB hobbyists, repair techs, and electronics workbench users\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003ch3\u003e\u003cb\u003eWhere It Fits Best\u003c\/b\u003e\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eOn the soldering bench for everyday quick checks\u003c\/li\u003e\n    \u003cli\u003eNext to a microscope or magnifier for SMD work\u003c\/li\u003e\n    \u003cli\u003eIn a field repair pouch or compact toolkit\u003c\/li\u003e\n    \u003cli\u003eAs a practical add-on item for electronics customers and RF.Guru supporters\u003c\/li\u003e\n    \u003cli\u003eAs a small but useful branded gift for makers and radio amateurs\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003e\u003cb\u003eCare and Handling\u003c\/b\u003e\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eWipe clean with a soft cloth\u003c\/li\u003e\n    \u003cli\u003eAvoid abrasive cleaners or harsh solvents\u003c\/li\u003e\n    \u003cli\u003eStore flat to help keep the edges and printed markings in good shape\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003cdiv class=\"related-reading\"\u003e\n    \u003cb\u003eRelated Links\u003c\/b\u003e\n    \u003ca class=\"rr-link\" href=\"https:\/\/shop.rf.guru\/\" target=\"_blank\" rel=\"noopener\"\u003eBrowse more RF.Guru products and bench accessories\u003c\/a\u003e\n    \u003ca class=\"rr-link\" href=\"https:\/\/shop.rf.guru\/pages\/subscribe\" target=\"_blank\" rel=\"noopener\"\u003eSubscribe for RF.Guru technical updates and lab notes\u003c\/a\u003e\n    \u003ca class=\"rr-link\" href=\"https:\/\/shop.rf.guru\/pages\/contact\" target=\"_blank\" rel=\"noopener\"\u003eContact RF.Guru for product questions or dealer inquiries\u003c\/a\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"mini-faq\"\u003e\n    \u003ch3\u003e\u003cb\u003eMini-FAQ\u003c\/b\u003e\u003c\/h3\u003e\n    \u003cul\u003e\n      \u003cli\u003e\n\u003cb\u003eIs this just a ruler?\u003c\/b\u003e No ... it is also a compact bench reference tool with quick guides for common electronics work.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cb\u003eWho is it for?\u003c\/b\u003e Anyone doing electronics bench work ... makers, PCB hobbyists, repair techs, and radio amateurs.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cb\u003eCan it replace calipers?\u003c\/b\u003e No ... it is best for fast visual checks and quick measurements, while calipers remain better for precision measurement.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cb\u003eWhat makes it useful on the bench?\u003c\/b\u003e It combines a metric ruler with SMD size references, width references, diameter checks, and semiconductor reminders in one compact tool.\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\n  \u003cp\u003e\n    Interested in more technical content? \u003ca href=\"https:\/\/shop.rf.guru\/pages\/subscribe\" target=\"_blank\" rel=\"noopener\"\u003eSubscribe to our updates for deep-dive RF articles and lab notes.\u003c\/a\u003e\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    Questions or experiences to share? Feel free to \u003ca href=\"https:\/\/shop.rf.guru\/pages\/contact\" target=\"_blank\" rel=\"noopener\"\u003econtact RF.Guru\u003c\/a\u003e.\n  \u003c\/p\u003e\n\n  \u003cdiv class=\"author-bio\"\u003e\n    \u003cb\u003e\u003ca href=\"https:\/\/on6ure.be\" target=\"_blank\" rel=\"noopener\"\u003eWritten by Joeri Van Dooren, ON6URE\u003c\/a\u003e\u003c\/b\u003e – RF engineer, antenna designer, and founder of RF.Guru, specializing in high-performance HF\/VHF antennas and RF components.\n  \u003c\/div\u003e\n\n  \u003cscript type=\"application\/ld+json\"\u003e\n  {\n    \"@context\": \"https:\/\/schema.org\",\n    \"@type\": \"FAQPage\",\n    \"mainEntity\": [\n      {\n        \"@type\": \"Question\",\n        \"name\": \"Is this just a ruler?\",\n        \"acceptedAnswer\": {\n          \"@type\": \"Answer\",\n          \"text\": \"No. It is also a compact bench reference tool with quick guides for common electronics work.\"\n        }\n      },\n      {\n        \"@type\": \"Question\",\n        \"name\": \"Who is it for?\",\n        \"acceptedAnswer\": {\n          \"@type\": \"Answer\",\n          \"text\": \"It is intended for makers, PCB hobbyists, repair techs, and radio amateurs who want a compact bench ruler with practical electronics reference markings.\"\n        }\n      },\n      {\n        \"@type\": \"Question\",\n        \"name\": \"Can it replace calipers?\",\n        \"acceptedAnswer\": {\n          \"@type\": \"Answer\",\n          \"text\": \"No. It is best for fast visual checks and quick measurements, while calipers remain better for precision measurement.\"\n        }\n      },\n      {\n        \"@type\": \"Question\",\n        \"name\": \"What makes it useful on the bench?\",\n        \"acceptedAnswer\": {\n          \"@type\": \"Answer\",\n          \"text\": \"It combines a metric ruler with SMD size references, width references, diameter checks, and semiconductor reminders in one compact tool.\"\n        }\n      }\n    ]\n  }\n  \u003c\/script\u003e\n\u003c\/div\u003e","brand":"RF Guru","offers":[{"title":"Default Title","offer_id":52949292810582,"sku":"2022-M-001","price":1.66,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0605\/4402\/4764\/files\/2022-M-001.webp?v=1774599485","url":"https:\/\/shop.rf.guru\/products\/rf-guru-9cm-ruler","provider":"RF Guru","version":"1.0","type":"link"}