Portable Diamond Thermal Conductivity Tester Pen

Why it works

LED and audible feedback for a controlled diamond check.

Follow a defined probe-based procedure with an LED indicator scale, audible buzzer, rear conductive panel and metal-contact alert in one handheld tester.

Key benefits

Why you will keep it within reach

LED indicator scale

Follow the visible indicator response while the probe is in contact with the stone.

Audible feedback

A buzzer adds an audible signal alongside the LED indication during the check.

Metal-contact alert

A continuous alert helps flag contact with metal rather than the intended stone surface.

Defined setup sequence

The instructions call for ready indication, level adjustment, rear-panel contact and a vertical probe position.

Details that matter

Controlled steps for consistent diamond checks

A pointed probe for direct stone contact

The handheld probe is brought vertically to the stone as part of the thermal-indicator process.

Visible and audible reading cues

An LED indicator scale works alongside the buzzer so the response can be followed in more than one way.

Rear conductive panel and metal alert

Touch the rear conductive panel during the procedure, while the continuous alert helps identify accidental contact with metal.

9V battery operation

The tester uses one 9V battery. The battery is not included with the product.

How it works

Simple by design

Install the battery

Fit one 9V battery, switch the tester on and wait for the ready indication. The battery is not included.

Set the reading level

Adjust the level according to the stone-weight and room-temperature guidance.

Hold the conductive panel

Keep contact with the rear conductive panel as directed in the test sequence.

Probe the stone vertically

Bring the probe straight down against the stone and follow the LED and audible response.

The specifics

Product details

Product type: Portable diamond thermal-conductivity tester pen
Visual feedback: LED indicator scale
Audible feedback: Buzzer
Metal contact: Continuous metal-contact alert
Power: One 9V battery
Battery included: No
Control surface: Rear conductive metal panel
Probe position: Vertical against the stone during testing
Color option: Black

Buying from ByOurielle

Our promise to you

Reviewed before it ships

Every product page is checked against the actual item — what you read is what you get.

30-day returns

Unused items can be returned within 30 days of delivery under our returns policy.

Real support

Questions before or after your order? Contact us and a person will answer.

FAQ

Good to know before you order

Is the 9V battery included?

No. The tester uses one 9V battery, but the battery is not included.

What feedback does the tester provide?

It uses an LED indicator scale and audible buzzer, plus a continuous alert for metal contact.

How should the probe touch the stone?

Hold the probe vertically against the stone while you touch the rear conductive panel during the check.

Does this page provide a numeric accuracy rating?

No numeric accuracy rating is specified for this product.

Is there a validated jade or jadeite interpretation method?

A validated jade or jadeite interpretation method is not specified; this product information covers diamond checking.

Keep browsing

More from ByOurielle

(1-15PCS) 12V 16AWG Add-a-circuit TAP Adapter Micro Mini Standard ATM APM Fuse Holder Blade Type For Auto Electrical Maintenance

$7.99