1 2

RF Guru

RF.Guru 9 cm Electronics Bench Ruler

RF.Guru 9 cm Electronics Bench Ruler

€1,66 EUR
€1,66 EUR
Sale Sold out
Tax included.

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.

Small tool, real bench value: 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.

What It Is

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.

Why It Is Useful

  • Quickly measure small parts, spacing, and board dimensions
  • Check common SMD package sizes at a glance
  • Compare drill or hole diameters visually
  • Use the width references during layout, prototyping, or inspection
  • Keep basic semiconductor symbol orientation hints right on the bench
  • Compact enough to leave next to the soldering station full-time
RF.Guru 9 cm electronics bench ruler front and back view Front view shows the measurement and reference side. The rear side carries RF.Guru branding and artwork.

Front-Side Reference Features

  • 0 to 9 cm metric ruler scale
  • SMD package size reference including common small packages such as 0201, 0402, 0603, 0805, and 1206
  • Width gauge reference from very fine widths up to larger bench-friendly values
  • Hole diameter comparison points for common small drill and lead sizes
  • Quick symbol reminders for bipolar transistors, MOSFETs, and diode orientation
  • Handy current-versus-width style reference for quick bench-side comparison
Bench note: 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.

Specs at a Glance

Feature Details
Length Scale 0 to 9 cm metric ruler
Primary Use Bench ruler and quick electronics reference tool
Reference Aids SMD package sizes, width references, hole sizes, and common semiconductor symbol reminders
Format Compact, flat, pocket-size bench accessory
Branding RF.Guru front and rear graphics
Typical Users Makers, hams, PCB hobbyists, repair techs, and electronics workbench users

Where It Fits Best

  • On the soldering bench for everyday quick checks
  • Next to a microscope or magnifier for SMD work
  • In a field repair pouch or compact toolkit
  • As a practical add-on item for electronics customers and RF.Guru supporters
  • As a small but useful branded gift for makers and radio amateurs

Care and Handling

  • Wipe clean with a soft cloth
  • Avoid abrasive cleaners or harsh solvents
  • Store flat to help keep the edges and printed markings in good shape
Related Links Browse more RF.Guru products and bench accessories Subscribe for RF.Guru technical updates and lab notes Contact RF.Guru for product questions or dealer inquiries

Mini-FAQ

  • Is this just a ruler? No ... it is also a compact bench reference tool with quick guides for common electronics work.
  • Who is it for? Anyone doing electronics bench work ... makers, PCB hobbyists, repair techs, and radio amateurs.
  • Can it replace calipers? No ... it is best for fast visual checks and quick measurements, while calipers remain better for precision measurement.
  • What makes it useful on the bench? It combines a metric ruler with SMD size references, width references, diameter checks, and semiconductor reminders in one compact tool.

Interested in more technical content? Subscribe to our updates for deep-dive RF articles and lab notes.

Questions or experiences to share? Feel free to contact RF.Guru.

Written by Joeri Van Dooren, ON6URE – RF engineer, antenna designer, and founder of RF.Guru, specializing in high-performance HF/VHF antennas and RF components.
View full details