MRM Precision Instruments Inc.
Ohaus Products

Ruby Jewelry Scales

When Cost Matters And Dependable Results Are A Must!

The Ohaus Ruby compact jewelry scale packs powerful features into a convenient, portable package. This rugged, dependable scale is attractive and versatile, with weighing units that include grams and pennyweights, and are a perfect solution for many jewelry applications.

  • The large LCD display allows for easy viewing of weighing results.
  • The Ruby is designed with superior RF protection to deliver accurate and stable results when used near cell phones or machines that could otherwise impair weighing activity.
  • Powered by three AAA batteries, the Ruby scale also has a low battery indicator as well as an automatic shut off feature that conserves the battery after a period of inactivity.

Picture Gallery


Application Modes

  • Weighing
Type Description
Construction ABS housing, stainless steel pan
Design Features Mechanical and software overload/underload protection, auto shut-off
Display Backlit liquid crystal display (LCD)
Operation AC adapter (included) or 3 AA batteries (included)

Units of Measurement

  • Gram
  • Pound:Ounce
  • Ounce Troy
  • Pennyweight


Photo Model Code Item Nr. Capacity Readability Platform
Battery dry
Test Weight
JR300 71148077 300g 0.1g 145x133mm X 300g, OIML M1 or ASTM Class F
JR2500 71148078 2500g 1g 145x133mm X 2500g, OIML M1 or ASTM Class F

Typical Areas

In a laboratory,In a classroom

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