Presidium OTi Synthetic Diamond Tester

Dual optical and thermal technology in a single probe for fast, on-the-spot diamond verification.

The Presidium OTi Diamond Verification Instrument® is a compact professional diamond screening device designed to help distinguish natural diamonds from CVD and HPHT lab-grown diamonds, moissanite, and common diamond simulants.

Combining Optical and Thermal testing technologies in a single probe, the OTi provides fast results without requiring separate testing instruments. Its portable design makes it ideal for jewelers, diamond dealers, wholesalers, pawnbrokers, and other jewelry professionals who need convenient diamond verification at the counter or on the go.

The OTi can test both loose and mounted diamonds and features a resistive touchscreen interface, replaceable probe technology, multiple interface languages, and built-in safety features.

Key Features

• Dual Optical & Thermal Technology: Combines two testing technologies into a single probe for fast diamond screening.

• Natural & Lab-Grown Diamond Screening: Helps identify colorless natural diamonds against CVD and HPHT lab-grown colorless diamonds.

• Moissanite & Simulant Detection: Helps identify all types of moissanite and common diamond simulants including cubic zirconia, glass, and sapphire.

• Loose & Mounted Diamond Testing: Test loose stones as well as diamonds mounted in a variety of jewelry settings.

• Single-Probe Operation: Optical and thermal testing are integrated into one convenient probe.

• Replaceable Probe Technology: Designed to minimize equipment downtime by allowing the probe to be replaced.

• Resistive Touchscreen: Integrated touchscreen provides convenient operation and result viewing.

• 6-Language Interface: User interface supports six languages.

• UV Safety Function: Built-in safety feature shuts off the UV light when it is not in use.

• Auto Shutdown: Helps conserve battery power when the instrument isn't being used.

• Low Battery Indicator: Provides an easy indication when batteries need replacement or recharging.

• Compact & Portable: Lightweight ergonomic design makes the OTi convenient for countertop and mobile testing.

• Tests Small Diamonds: Suitable for colorless polished diamonds of proportional cuts with a minimum table width of 1.6mm.

How It Works

The Presidium OTi combines optical and thermal testing technologies into one probe, allowing professional users to perform diamond screening with a single instrument.

Position the gemstone for testing and use the OTi probe according to Presidium's testing procedure. The instrument analyzes the stone using its dual testing technologies to provide an immediate screening result.

Its combination of optical and thermal testing helps professionals distinguish natural diamonds from lab-grown diamonds, moissanite, and common diamond simulants during routine jewelry authentication and intake.

Specifications

Testing Capability: Natural colorless diamonds, CVD lab-grown colorless diamonds, HPHT lab-grown colorless diamonds, moissanite, and common diamond simulants including cubic zirconia, glass, and sapphire

Minimum Stone Size: Minimum gemstone table width of 1.6mm

Testing Format: Loose and mounted diamonds

Testing Technology: Dual Optical/Thermal technology

Display: Resistive touchscreen

User Interface: 6 languages

Dimensions: 105mm × 70mm × 24.8mm

Weight: Approx. 60g without batteries

Power: 3 × AAA rechargeable or non-rechargeable lithium batteries, or compatible power bank via USB cable

Battery Life: Up to approximately 1.5 hours of continuous use

Operating Temperature: 18°C–27°C (65°F–80°F)

Storage Temperature: 10°C–51°C (50°F–124°F)

Power Information

The OTi can be powered using three AAA lithium batteries or through its USB cable with an appropriate external power source.

The included USB cable provides an alternative way to power the tester but does not charge the tester itself.

Power adapter is not included.

Ideal For

Professional jewelers, diamond wholesalers and traders, gemologists, pawnbrokers, jewelry retailers, buyers, and other professionals who need a compact solution for screening diamonds during buying, selling, appraisal, intake, or verification.

What's Included / Important Notes

• USB cable included

• Power adapter not included

• Batteries not provided

• Replaceable OTi probe system

• Designed for colorless polished diamonds meeting the manufacturer's testing requirements

Important: The Presidium OTi is a professional diamond screening and verification instrument. Always follow Presidium's operating procedures and testing guidelines when interpreting results.