Presidium Replacement Probe Pen PS2-2 for Gem Tester II - Precise Tip

In this review the Presidium Replacement Probe Pen PS2-2 is assessed as a direct replacement probe for the Presidium Gem Tester II (PGT II) and Presidium Duo Tester II (PDT II). It is aimed at jewelry makers, bench technicians and hobbyists who need a working probe tip for thermal conductivity testing; the single biggest reason to buy is the pen's industry-grade titanium construction and the exceptionally thin retractable tip that helps maintain consistent contact and pressure during testing, which is essential for reliable gem identification.

Key Features

• Product Compatibility: Designed specifically for use with the Presidium Gem Tester II (PGT II) and Presidium Duo Tester II (PDT II), so it fits and functions as the intended replacement probe.
• Titanium Construction: Built from titanium for a durable replacement option that resists corrosion and handles routine bench use.
• Thinnest Retractable Probe Tip: The exceptionally thin retractable tip ensures consistent pressure against the gemstone and improves repeatability of contact readings.
• Versatile and Reliable: Offers steady performance across common gemstones and diamonds when used with the compatible testers, providing consistent results when technique is steady.
• Easy Replacement: Intended as a direct swap for a missing or damaged probe pen, reducing downtime for testing and repairs.

Who It's For

The replacement probe pen suits bench jewelers, gem dealers, and hobbyists who already own a Presidium Gem Tester II or Duo Tester II and need a like-for-like probe replacement that maintains the instrument's intended feel and contact quality. It is helpful when the original pen is lost, the tip is worn, or a spare is desired to keep testing uninterrupted.

Those who should look elsewhere include users with non-Presidium testers or people seeking a universal probe for multiple brands, since this probe is only compatible with two Presidium models. If long-term heavy industrial use or repeated rough handling is anticipated, consider sourcing additional spare pens because some customers report durability concerns over extended periods.

Pros & Cons

Pros

• Industry-trusted titanium construction provides a level of durability and resistance to corrosion compared with basic metal pens.
• The thin retractable tip gives a precise contact point and helps produce repeatable readings when technique is consistent.
• Direct compatibility with PGT II and PDT II makes replacement straightforward and reduces setup time.

Cons

• Only compatible with Presidium Gem Tester II and Duo Tester II, so it is not universal.
• Some users report pen durability and occasional calibration or accuracy inconsistencies with the overall tester, so keeping spares is advisable.

Specifications

Product name	Presidium Replacement Probe Pen PS2-2
Compatible models	Presidium Gem Tester II (PGT II), Presidium Duo Tester II (PDT II)
Probe material	Titanium
Tip type	Thinnest retractable probe tip
Primary use	Replacement probe for thermal conductivity gemstone testing
Typical users	Jewelry makers, gem dealers, bench technicians, hobbyists

Our Verdict

The PS2-2 probe pen is a practical, value-focused replacement for owners of the Presidium Gem Tester II and Duo Tester II who need accurate contact and a fine retractable tip. It delivers reliable tactile performance and is a sensible spare or repair part, though buyers should be aware of occasional durability reports and keep a backup if they test frequently.

Frequently Asked Questions

Is this pen compatible with other gem testers?
No, it is made for the Presidium Gem Tester II (PGT II) and Presidium Duo Tester II (PDT II) only.

What material is the probe tip made from?
The pen uses a titanium probe and features the industrys thinnest retractable probe tip for precise contact.

Should I buy extras?
Yes, because some users report wear or durability issues over time, keeping a spare pen reduces downtime.