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  • Vee Gee Scientific STX-3 Handheld Refractometer, with Salinity Scale, 0-100, +/-1.0 Accuracy, 1.0 Resolution
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Vee Gee Scientific STX-3 Handheld Refractometer, with Salinity Scale, 0-100, +/-1.0 Accuracy, 1.0 Resolution

8 customer reviews

List Price: $110.50
Price: $86.98 & FREE Shipping. Details
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Specifications for this item
Brand Name Vee Gee Scientific
Part Number STX-3
Number of Items 1
Measurement Type Salinity , Temperature
Overall Height 185  mm
Overall Length 40  mm
Overall Width 40  mm
UNSPSC Code 41115312

The VEE GEE STX-3 is a handheld, portable, water-resistant salinity refrac... Read full product description



Product Features

  • Handheld portable refractometer for measurement of salt concentration in parts per thousand (PPT) (0 to 100%) and specific gravity (SG) (1.000 to 1.070) of seawater in the 10 to 30 degrees C temperature range
  • Automatic temperature compensation (ATC) for immediate and accurate calibration readings, regardless of ambient temperature
  • Ambient light illuminates the scale; no additional power source is required
  • Durable metal and rubber outer shell with a telescope-shaped, streamlined design (40 x 40 x 185mm), a rubber grip to guard against hand heat for accurate measurements, and a non-roll stand to protect against damage
  • Optical glass prism mounted in all-metal housing for quick temperature equilibrium between sample and prism

Product Details

  • Shipping Weight: 12 ounces (View shipping rates and policies)
  • Domestic Shipping: Currently, item can be shipped only within the U.S. and to APO/FPO addresses. For APO/FPO shipments, please check with the manufacturer regarding warranty and support issues.
  • International Shipping: This item is not eligible for international shipping. Learn More
  • ASIN: B004WDW70M
  • Item model number: STX-3
  • Average Customer Review: 4.8 out of 5 stars  See all reviews (8 customer reviews)
  • Amazon Best Sellers Rank: #15,577 in Industrial & Scientific (See Top 100 in Industrial & Scientific)
  • Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.

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Frequently Bought Together

Vee Gee Scientific STX-3 Handheld Refractometer, with Salinity Scale, 0-100, +/-1.0 Accuracy, 1.0 Resolution + American Marine PINPOINT Salinity Calibration Fluid, 53.0mS/1.026SG
Price for both: $101.97

Buy the selected items together

Product Description

The VEE GEE STX-3 is a handheld, portable, water-resistant salinity refractometer that measures salt concentration in parts per thousand (PPT) in the 0 to 100% range and specific gravity (SG) of seawater in the 1.000 to 1.070 range, has automatic temperature compensation (ATC), and a durable metal body with rubber grip. A salinity refractometer measures the concentration of salt, such as sodium chloride, magnesium and calcium sulfates, in liquids and displays the results. Handheld refractometers, also known as sugar meters, concentration meters, or Brix meters, are commonly used in the culinary, food and beverage, pharmaceutical, educational, geological, chemical, and ecological industries, and for water-testing applications.

This refractometer is housed in a durable metal body. The VEE GEE STX-3 features ATC for immediate, accurate readings, with an ambient temperature of 10 to 30 degrees C. The unit is factory-calibrated and can be calibrated with distilled water. Calibration can be controlled and adjusted with a tool-free calibration ring and a set screw. The outer shell is rubber coated with dimpled grip for easy gripping and the rubber coating guards against hand heat for accurate measurements. A non-roll stand prevents the unit from rolling when placed on a flat surface such as a table or bench top. The optical glass prism is mounted in an all-metal housing composed of copper alloy with a nickel-chrome coating for quick temperature equilibrium between the sample and the prism. The analog Brix scale features a bright, high-contrast display for clear visibility of the boundary and memory lines intersection. Instantaneous sample readings illuminated by ambient light are viewed through a monocular, focusable, cushioned eyepiece. The unit comes with a zippered vinyl carrying case, a plastic transfer pipet and an instruction manual.

Specifications

Measurement scale range Salinity (PPT) 0 to 100%, Seawater (SG) 1.000 to 1.070
Specimen measurement temperature range 10 to 30 degrees C
Accuracy Salinity + or – 1.0%, Seawater (SG) + or – 0.001, Temperature + or - 1 degrees C
Resolution Salinity 1.0%, Seawater (SG) 0.001, Temperature 1 degrees C
Ambient temperature for unit operation 10 to 30 degrees C
Sample volume > 0.1ml
Measurement time Instantaneous
Body type Copper alloy with a nickel-chrome coating
Illumination Ambient light; unit requires no additional power source
Dimensions 40 x 40 x 185mm (H x W x D)
Weight 285g
Warranty One year

H is height, the vertical distance from the lowest to highest point; W is width, the horizontal distance from left to right; D is depth, the horizontal distance from front to back.

Refractometers are used to determine substance content in a sample, to provide unit readings of substances including Brix, salinity, and alcohol; to detect chemical impurities, or to measure components of samples such as industrial fluid. Refractometers measure the refractive index of a substance, which is its optical characteristic, and the number of dissolved particles in it. The refractive index is the ratio of the speed of light in empty space to the speed of light in a substance; when light passes from one medium to another. Generally, a low concentration sample has a larger angle of refraction than a high concentration sample. For example, a straw placed in a high-concentration substance appears more bent than when placed in a low-concentration substance. Refractometers can work with natural light, or with an external power source such as batteries or electricity. They typically have either a digital or analog reading display, though some units utilize both types. Some analog-display refractometers can be used for both solids and liquids. Digital-display refractometers are used exclusively for liquids. Types of refractometers include handheld, benchtop, and in-process. Handheld refractometers are elongated and telescope-shaped, or shorter and rectangular. Analog handheld refractometer readings are obtained by looking through the monocular eyepiece and viewing where the boundary line intersects with the memory line. Digital handheld models provide a digital readout. Benchtop refractometers typically measure with a higher degree of accuracy than handheld units. In-process refractometers are used for continuous process monitoring and data readouts, and are generally fitted into a piping system for ongoing analysis. Refractometers are used in a wide variety of applications in the culinary, food and beverage, pharmaceutical, educational, geological, chemical, ecological, and automotive industries, and for water-testing applications.

VEE GEE Scientific manufactures laboratory equipment and supplies, and makes the VanGuard brand of products. The company, founded in 1981 and headquartered in Kirkland, WA, offers scientific equipment for educational, research, clinical, and industrial applications.

What’s in the Box?

  • STX-3 refractometer
  • Vinyl carrying case
  • Plastic transfer pipet
  • Instructions


Customer Questions & Answers

Customer Reviews

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88%
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3 star
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Most Helpful Customer Reviews

2 of 2 people found the following review helpful By Footprints in the Water on October 20, 2014
Verified Purchase
This is the best refractometer for its price. Since I use it in the field for checking salt levels in estuaries and at the shore as part of my work as an estuarine scientist, I wish it were waterproof. But, the readings seem accurate, it's easy to calibrate, and provides useful information at a low cost. It would be great if Vee Gee developed one for field applications in the environmental salinity range, i.e., 0-50 ppt, which might provide a little more accuracy and sensitivity. Also, the eye cups tend to fall off and I don't see that replacements are sold anywhere.
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2 of 2 people found the following review helpful By towneblacksmith on June 19, 2014
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I had a $50 refractometer before this one and it was all over the place giving me the most inaccurate readings...and very inconsistent. Once I got this Vee Gee I had no regrets over my purchase. Honestly, worth every penny. And I found out my salinity in my saltwater tanks were WAY off. So my fish and corals are very thankful for the purchase as well.
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2 of 2 people found the following review helpful By MNvDubs on January 26, 2012
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Best purchase I have made by far for my saltwater aquarium! Don't mess around with inaccurate hydrometers. This refractometer came pre calibrated right out of the box (purchased calibration solution just in case). Literally could not make checking your salinity any easier or more accurate. My fish are happier than ever!
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1 of 1 people found the following review helpful By Miguel on April 28, 2014
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There are cheap refractometers and there are Vee Gee refractometers. The cheap ones are very light weight and quite frankly, cheaply made with plastic and a screw adjustment for calibration. The Vee Gee is a substantial instrument with an optical glass prism and has a very nice ring for easily adjusting the calibration. If you're going to buy a refractometer for your saltwater tank (and you should rather than rely on the inaccurate swing-arm hydrometers), you really should step up to the Vee Gee. This one is definitely worth the extra money!
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