Gain Express Holdings Ltd.

Product Description:

CLMG-7030 is professionally made with precision and HIGH QUALITY, the finest and highest materials. This item is a jewelerâ � � s loupe that has been....

The Refractive Index Fluid is Gemologist tool for identifying Refractive index. The product allows your refractometer to measure within the measuring range of 1.30 to 1.80....

This Chelsea Filter is designed to transmit only deep red and yellow-green light ( best obtained under strong electric light) . Just hold the filter close to your eye and look at....

Made with precision and HIGH QUALITY and one of the most important tools used to inspect gemstones and other jewelry. It have special lenses that allow our eyes to focus on an....

Product Description:

A battery refractometer is designed for testing the refractive index or concentration of battery fluids, antifreeze liquid and cleaning fluids that works....

RHB-90ATC Brix Refractometer is designed to work with sugar related liquids such as high sugar content, honey, jelly, jam and syrup to help monitor and control sugar....

The polariscope is an instrument specially design for analyzing and viewing gemstones. This is also use to check if the gemstone is doubly or singly refractive. This portable....

Designed for clinical usage and intended for both Veterinary and Human. This unit provides quick and accurate indication of vital fluids levels. It has triple scale that gives....

Product Description:

A refractometer is an optical instrument made of high quality aluminum is used to measure the concentration or refractive index of liquids. The RHB-10ATC, ....

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Does a poorly lighted or dark area hinder you from seeing the magnified part of an object? Worry no more!

GM-1018 folding loupe offers high quality 10X, 21mm....

A 10X, 18mm Loupe with darkfield. A small instrument that provides 10x magnification as in a standard loupe, with an important added feature: it is combined with a specially....

Product Description:

Engineered specifically to quickly determine the alcohol content of wine, beer, juices, whisky, vodka and a variety of other liquors. RHW-80ATC works with....

Dichroscope show whether or not a stone is dichroic ( reflects 2 colors) . This can be helpful in differentiating stones of the same color from one another. Dichroscopes can be....

An upgraded version of RHB-32ATC with an additional feature, its LIGHTER comes with an ADJUSTABLE FOCUS, and BUILT-IN CALIBRATION KNOB. Just a simple turn to control, focus and....

CLMG-7205 detects the absorption of spectra. It is use to view the colour of a gemstone, either by shining a light ( pen-torch) through the stone into the spectroscope if the....

Product Description:

RHB-18ATC has the multi-function capabilities of our RHB-10ATC, measures with high accuracy and preciseness, vivid and sharp reticale chart to for easy....

Brix Refractometer is developed for working with sugar related liquids such as fruit juice, soft-drinks, wine, and honey to help monitor and control sugar concentrations in foods....

Our new design clinical refractometer, RHCN-200ATC is designed for clinical usage and intended for both Veterinary and Human. This unit provides quick and accurate indication of....

This technologically enhance tester is design to identify real diamonds from non-diamonds and diamond simulants with a single step. It does not need a separate diamond selector....

GX-199 is equipped with 54 BRIGHT WHITE bulbs and an ADJUSTABLE MOUNTING DIAMETER from 44mm to 60mm with white casing. It covers a well-distributed illumination that can be....

The CLMG-7202 polariscope is use to test cut or rough gemstones. Allows two polarising filters to observe the structure and optical properties of precious stones or minerals. It....

Equipped with 4-zone Lighting Control, a Frosted Glass Diffuser, ADJUSTABLE 48mm MOUNTING DIAMETER, GX-960 becomes the most functional ring light. It covers a well-distributed....

A handheld spectroscope for visible light shows the absorption lines of the elements involved in producing its color. For instance, it helps to separate ruby ( chrome) against red....

This handy piece of equipment is perhaps the most important tool in gemology, spectroscope breaks up the light being transmitted from a gemstone into its spectral colors, which....

The GR-701, commonly known as Gemstone Refractometer, is the primary and most powerful tool in identify and authenticate polished precious and semiprecious gemstones and observing....

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One of the advantages of GX-760 is its ESD-SAFE FEATURE which prevents the electrostatic discharge that causes minor discomfort to people, severe damage....

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Design mainly to fit right to any camera & microscope. Every single unit is marked with CE on the controller' s housing, which means it PASSES ALL THE....

An energy-saving easy to install ring light that features low temperature to maximize the operation and user' s comfort, even for a long period. GX-860 is equipped with 144 evenly....

Product Description:

GX-301 has been re-engineered and is now capable to change the defult lighting color to WHITE, BLUE, RED, GREEN or YELLOW with the use of color filters.....

Product Description:

The GX-380 ring light offers a bigger mounting diameter, which measures 74mm. Big camera lenses and microscopes will now enjoy the diversity of having a....

This professional quality TDS meter with ATC has IP57 waterproof is designed to measure TDS measurements. Developed to withstand wet environment and preven dust from entering the....

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Keeping tabs on your blood pressure is easier than ever! Wrist-Type Blood Pressure Monitor makes it easy to take a quick and clinically accurate blood pressure....

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Arm-Type Blood Pressure Monitor makes it easy to take a quick and clinically accurate blood pressure reading anywhere. Arm cuff is designed to be adjusted to....

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This ear thermometer is as accurate and as reliable as that of Underarm Thermometer! In a second you' ll have the body temperature. It' s SAFE and very HYGIENIC....

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Having the small and compact design you can carry this IR thermometer to absolutely anywhere easily. It can even fit in your jacket pocket and loaded with great....

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The Microscopic world is brought alive by the DVMC-500 - an amazing, easy to use high resolution USB handheld powered digital microscope with up to 200x....

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This pH Controller is an upgraded version of our PH-201 Controller. It is the industrial & heavy duty version with a new re-engineered body structure. Equipped with....

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A revolutionary 3-in-1 digital protractor uses angle sensor technology to calculate exact angles simply by tilting it to the desired angle! Measurements are....

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Digital level box and angle gauge provide relative and absolute measurements as well as zero setting to any position. It has a built-in fine spirit level on top....

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An innovative tool that read precise angles within the  ± 180 ° ( 0-360 ° ) range and produce precise readings on table saws and other shop equipment in seconds! Built....

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PH-251 has been re-engineered to bring the latest pH meter with Built-in Rechargeable Battery, waterproof electrode, large 4-digit screen. and big numbers to view....

Product Description:

The NEW DIGITAL PH METER is a less expensive, slick and stylish handy meter that comes with a large and easy to read display system. A 1m cable from meter to....

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Whether youâ � � re a professional or an amateur DIY-er or craftsman, unleveled edges and badly measured angles are a real no-no. Take the guesswork out of measuring, ....

Product Description:

This Six-in-One meter has been re-engineered w/ BUILT-IN RECHARGEABLE BATTERY to save you from the hassle of buying, placing & replacing button batteries.....

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PH-0131 is an advanced pH, ORP and Temperature meter specifically designed to provide precise measurements even under harsh conditions. The controller is....

RHAN-100ATC uses DEGREES FAHRENHEIT ( Â ° F) as unit of measurement and features BUILT-IN CALIBRATION KNOB, has MUCH LIGHTER WEIGHT and is SHORTER. This Refractometer is designed for....

SL-5868P is an extremely versatile instrument with bigger & wider 30-130dB range. Equipped with built-in calibration signal of 94dB at 1kHz and offers 4 measurement parameters....