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Atago 2341 MASTER-4 (alpha) Hand-Held Refractometer, Automatic Temperature Compensation, Brix 45.0 to 82.0%


Product Description:

The Atago 2341 MASTER-4α (alpha) is a hand-held, portable, water-resistant refractometer with a Brix scale that measures in the 45.0 - 82.0% range, has automatic temperature compensation (ATC), and is housed in an Ingress-Protection (IP)-65 rated metal body. A Brix refractometer measures the refractive index of a solution in a sample, converts it to sugar concentration in units of percent by weight (% Brix, also known as degrees Brix), and displays the results. Hand-held refractometers, also known as sugar metres, concentration metres, or Brix metres, 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, die-cast aluminium metal body for heat and organic solvent resistance. Its body is IP-65 rated (excluding the eyepiece) for protection against dust and water jets, and the unit can be cleaned with running water under a faucet. The 2341 MASTER-4α features ATC for immediate, accurate readings, regardless of ambient temperature. Calibration can be controlled and adjusted with an exposed calibration screw and an included specialised screwdriver, although other items can be used to unscrew the unit. However, the unit retains its water-resistance. A spoon-shaped tip allows for automatic sample distribution (ASD) across the prism and boundary line (also called measurement line) for accurate, smooth sampling with small portions. The outer shell grip is smooth and easy to clean, which reduces the possibility of food and sample entrapment, avoiding contamination and bacterial growth. The analogue Brix scale features a bright, high-contrast display for clear visibility of the boundary and memory lines intersection. Samples are viewed through a monocular, focusable, cushioned eyepiece. The unit includes a protective plastic storage case with a foam cut-out insert to cushion the instrument.

Specifications Measurement scale range Brix 45.0 - 82.0percent (ATC) Minimum detection scale Brix 0.2 percent Accuracy Brix + or - 0.2 percent at 10 to 40 degrees C Resolution Brix + or - 0.1 percent Sample volume 10μl or more Standards met IP-65 dust-tight and protected against water jets (except eyepiece), and International Organisation for Standardisation (ISO) 9001 Illumination Ambient light; unit requires no additional power source Dimensions 20 x 4 x 4 cm (H x W x D) Weight 130g Warranty Limited 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 analogue reading display, though some units utilise both types. Some analogue-display refractometers can be used for both solids and liquids. Digital-display refractometers are used exclusively for liquids. Types of refractometers include hand-held, benchtop, and in-process. Hand-held refractometers are elongated and telescope-shaped, or shorter and rectangular. Analogue hand-held refractometer readings are obtained by looking through the monocular eyepiece and viewing where the boundary line intersects with the memory line. Digital hand-held models provide a digital readout. Benchtop refractometers typically measure with a higher degree of accuracy than hand-held 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.

Atago Co., Ltd. manufactures analytical instruments such as refractometers, polarimeters, and saccharimeters, as well as a variety of metres. The company, founded in 1940 and headquartered in Tokyo, offers products that comply with Hazard Analysis and Critical Control Points (HACCP), Good Manufacturing Practises (GMP), and Good Laboratory Practises (GLP) system standards, and many International Organisation for Standardisation (ISO) standards.

What’s in the Box.

  • 2341 MASTER-4α refractometer
  • Calibration screwdriver
  • Plastic storage case
  • Instructions
Product Details
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