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.

Presidium Multi Tester Iii Pmut Iii All In One Instrument

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

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E£ 38852

Duties & taxes included

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Sold byAmazon EGYPTDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💎 Unlock the secret world of gems with precision and style!

ALL IN ONE PRECISION - The world’s first tester combining diamond & moissanite detection in one sleek device.
ERGONOMIC PORTABLE - Rubberized anti-slip grip with lightweight design and carrying case for on-the-go professionals.
ULTRA FINE PROBE TIP - Industry’s thinnest 0.6mm retractable probe ensures accurate testing on stones as small as 0.02ct.
PRO LEVEL CALIBRATION - Requires calibration for peak accuracy—master the technique and join the elite circle of gemstone experts.
DUAL ANGLE LED DISPLAY - 180-degree multi-viewing screen perfect for right or left-handed users, enhancing ease of use.

The Presidium Multi Tester III is a cutting-edge handheld instrument designed to test colorless diamonds, moissanites, and diamond simulants with unmatched precision. Featuring the industry’s thinnest 0.6mm retractable probe tip, a 180-degree LED display, and powered by 3 AAA batteries, it offers portability and ergonomic comfort. Ideal for professionals who demand reliable, all-in-one gemstone verification, it requires calibration and practice to maximize accuracy.

Specifications

ASIN	B004QYR8U6
Best Sellers Rank	#61,328 in Arts, Crafts & Sewing ( See Top 100 in Arts, Crafts & Sewing ) #17 in Jewelry Diamond Testers
Customer Reviews	3.7 3.7 out of 5 stars (408)
Department	womens
Item Weight	3.42 ounces
Item model number	PMuT III
Manufacturer	Presidium Instruments LTD
Product Dimensions	3.4 x 2.4 x 8 inches

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