how do you calibrate it?

Calibration is not needed as far as I know

Placing on diamonds and having no response, what does that mean?

I have used this unit and had the same response on known diamonds. Sometimes the stone is dirty and needs a cleaning. This can throw off results. Also, my unit is getting returned when I have a suitable replacement. It sometimes takes 3 or more tries to get it to register. Clean the stone and try touching it with a firm but not point grinding pressure a few times and if it doesn't work try another tester. Assuming of course you know the diamond is real.

How can I get a replacement tip?

You can get it replaced from manufacturer, fill out the return form.

Multi Tester Iii | Desertcart Portugal

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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€ 456.39

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Sold byAmazon PortugalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💎 Test with confidence, carry with pride — the ultimate gem authenticity sidekick!

DUAL DETECTION POWER - World’s first all-in-one tester for both colorless diamonds and moissanites—no need for multiple devices.
ERGONOMIC PORTABLE - Rubberized anti-slip grip with lightweight design and carrying case for effortless, on-the-go use.
USER FRIENDLY VIEWING - 180-degree multi-angle LED display adapts for right or left-handed professionals, enhancing readability.
RELIABLE RESULTS EVERY TIME - Consistent probe pressure technology guarantees dependable identification, minimizing user error.
PRECISION AT THE MICRO LEVEL - Industry’s thinnest 0.6mm retractable probe tip ensures ultra-accurate gemstone testing.

The Presidium Multi Tester III is a compact, ergonomic handheld device designed to instantly and accurately distinguish between colorless diamonds and moissanites. Featuring the industry’s thinnest 0.6mm retractable probe tip, it can test stones as small as 0.02 carats. Its 180-degree multi-angle LED display supports both right and left-handed users, while the rubberized anti-slip grip and included carrying case make it perfect for professionals on the move. This all-in-one instrument leverages advanced thermal and electrical property detection to deliver reliable gemstone verification, setting a new standard in precision testing tools.

Reviews

L**N

Worth the price

28.05.2025

K**5

Works amazingly well if you practice

8.04.2025

M**O

No es tan confiable, muy caro para lo que es.

El producyo aparenta muy buena calidad, pero no es lo que promete. Tengo casos en los que un diamante HPHT es leido como diamante cuando esta sobre la placa de aluminio suministrada y una vez montado en oro lo lee como Moissanita. Casos en los que pequeños diamantes naturales los lee como Moissanitas. Y casos en los que a las Moissanitas las lee como diamantes.. Aun limpiando, aun cambiando pilas, aun verificando angulo de toma, aun con todo lo que se recomienda hacer, lls errores de lectura son persistentes, por lo que no es confiable su uso. para eso, vale mas comprar un diamond selector de 150 pesos (conductividad termica) y un Moissanita terster de 150 pesos (conductividad electrica) y con menos del 10% de lo que vale este producto tienes los mismos o incluso mejores resultados de lectura, ya que con esos aparatos baratos si temgo lecturas persistentes de lo que se trata.

11.02.2024

D**!

Incomplete item and used!!!

3.01.2025

S**.

Item

16.07.2024

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