The RF30 requires only 2 or 3 drops of solution and provides accurate and repeatable measurements on an easy to read scale. Prism and lens with a simple focus adjustment. It comes complete with case, calibration screwdriver, plastic pipette and calibration solution.

Extech RF30 Features:

• Measures the brix concentration in fruit juice, lubricants, cutting and other industrial fluids
• 3 ranges 0 – 41%, 42 – 71%, 72 – 90%
• Compact size, easy to operate
• Provides accurate and repeatable measurements on easy to read scale
• Requires only 2 or 3 drops of solution
• The prism and lens with a simple focus adjustment
• Complete with case, calibration screwdriver, plastic pipette and calibration solution

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Extech RF153 Features:

• Dual LCD simultaneously displays %Brix or Refractive Index (RI) and Temperature
• Wide 0 to 53% Brix measurement range with 0.1% resolution
• Abrasion and corrosion-resistant coating on sapphire prism
• Automatic Temperature Compensation (ATC)
• Water resistant (IP65)
• Zero calibration with distilled or tap water
• Data Hold and Low Battery indicator
• Auto power off (after 2 minutes)
• Store/recall 10 measurements
• Complete with built-in prism cover, wrist strap, 2 AAA batteries, and pouch

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The RF10  requires only two or three drops of solution and comes with the prism and lens which has a simple focus adjustment. The RF10 0 to 32% Brix Refractometer comes complete with a case, a calibration screwdriver, a plastic pipette and the calibration solution.

Extech RF10 Features:

• Compact size, easy to operate
• Provides accurate and repeatable measurements on easy to read scale
• Requires only 2 or 3 drops of solution
• The prism and lens with a simple focus adjustment
• Complete with case, calibration screwdriver, plastic pipette and calibration solution

Extech RF10 Specifications:

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• Compact size, easy to operate
• Automatic Temperature Compensation (ATC) from 10 to 30°C
• Provides accurate and repeatable measurements on easy to read scale
• Requires only 2 or 3 drops of solution
• The prism and lens with a simple focus adjustment
• Complete with case, calibration screwdriver, plastic pipette and calibration solution

Extech RF11 Portable Sucrose Brix Refractometer (0 to 10%) with ATC Specifications:

• Min Brix Range (%) 0
• Max Brix Range (%) 10
• Resolution0.1% (Brix)
• Accuracy±0.1% (Brix)
• Max Temperature Compensation (° C) 30
• Min Temperature Compensation (° C) 10
• Dimensions: 190 x 40 x 30mm (
• Weight: 185g

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The instrument measures the refractive index of the sample and displays the result in parts per thousand (0/00) and specific gravity (d 20/20).

1. Zero Adjustment
Cover the prism with a few drops of distilled water from the included vial. Close the cover plate and rotate the adjusting screw so that the light/dark boundary line (known as the shadow-line) evens up with the zero line. After the zero adjustment, clean the prism with soft cloth.

2. Sample Preparation and Measurement Readings
To take a reading, place a few drops of a sample liquid on the measurement prism. Ensure that enough solution is
added to the prism in order to cover the entire prism. Close the prism so that the liquid spreads across the entire surface of the prism without air bubbles or dry spots. Allow the sample to remain on the prism for  approximately 30 seconds.

While holding the instrument under a light source, look through the eyepiece. The salinity concentration is determined by the intersection of the boundary of the light and dark fields (known as the shadow-line) on the printed scale. The left side of the scale indicates the specific gravity and the right side parts per thousand. If the scale appears out of focus, the eyepiece may be adjusted by rotating the knurled portion.

The instrument also features an eye guard to prevent stray light from entering the eyepiece and causing reflections. It may be necessary to adjust the position of the light source to maximize the contrast of the shadow-line.

Under normal conditions, optimal contrast is obtained by holding the instrument underneath and perpendicular to a light source. Once a reading has been taken, wipe dry with a clean cloth (do not wash or rinse) and place the instrument in the supplied plastic case. Store the instrument in a safe, dry environment.

Extech RF20 Components:

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A refractometer is a simple instrument used for measuring concentrations of aqueous solutions. It requires only a few drops of liquid and is used throughout the food, agricultural, chemical, and manufacturing industries.

When light enters a liquid it changes direction – this is called refraction.

A refractometer measure the degree to which the light changes direction, this is called the angle of refraction. A refractometer takes the refraction angles and correlates them to refractive index (nD) values that have been established. Using these values, you can determine the concentrations of solutions. For example, solutions have different refractive indexes depending on their concentration.

The Extech RF41 Portable Battery Coolant/Glycol Refractometer with ATC (°C) measures the Propylene/Ethylene Glycol freezing point from -50 to 0°C and the Specific Gravity of battery acid from 1.11 to 1.30 and provides a quick reference of battery charge condition.

The Extech RF41 requires only 2 or 3 drops of solution for fast and accurate readings.

Automatic Temperature Compensation provides repeatable measurements on an easy to read scale. Prism and lens with a simple focus adjustment. Includes carrying case and calibration screwdriver.

Extech RF41 Components:

Extech RF41 Portable Refractometer Specifications:

The post Extech RF41 Portable Battery Coolant/Glycol Refractometer with ATC (°C) appeared first on rapid-tech.

• It is essential to know the concentration and freezing point of anti-freeze coolants for vehicular safety
• Keeping a suitable concentration of coolant prevents engine trouble and possible radiator corrosion
• This tester monitors the freezing point of both Ethylene Glycol and Propylene Glycol in addition, it indicates battery recharge level
• This tester is simple to use; requiring only a few drops to provide accurate readings within seconds
• It is virtually indispensable for gas stations, service shops, cab companies, etc.

REED R9700 Specifications

REED R9700 Calibration

1. Open the cover plate and place 2-3 drops of distilled water onto the prism surface, close the cover plate, press lightly and ensure the water spreads evenly across the whole surface area without air bubbles or dry sections. (wait 30 seconds until the water adjusts to ambient temperature)

2. Hold towards light source and look into the eyepiece, if the boundary line between the upper blue field and the lower white field is not located exactly on the 0°C waterline, adjust the correcting screw until both lines meet.

3. Wipe the water from the prism with clean dry cloth and replace the rubber correcting screw cover.

NOTE: under normal operating conditions the calibration only needs to be checked periodically.

Warning

1. DO NOT IMMERSE IN OR CLEAN WITH RUNNING WATER

2. THIS TOOL IS A PRECISON OPTICAL INSTRUMENT, IT REQUIRES CAREFULL HANDLING and STORAGE

3. DO NOT DROP OR SUBJECT TO SHOCK AS DAMAGE MAY RESULT TO THE MIRROR TUBE and OPTICAL COMPONENTS

4. DO NOT SCRATCH OR ATTEMPT TO MEASURE CORROSIVE CHEMICALS AS DAMAGE MAY OCCUR TO THE PRISM’S COATING

CAUTION – use extreme care when opening the radiator cap – do not remove while engine is running or the engine is warm. Do not let battery fluid come in contact with skin or eyes – personal injury may result

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Features

• Salinity refractometers are useful for measuring the concentration of natural or artificial seawater in aquariums, holding tanks, and breeding ponds
• They can also be used for controlling the saltwater concentration when preparing pickles, measuring the concentration of saltwater used in rinsing and cooking sea products

REED R9600 Specifications

Calibration

1. Open the cover plate & place 2-3 drops of distilled water onto the prism surface, close the cover plate, press lightly & ensure the water spreads evenly across the whole surface area without air bubbles or dry sections. (wait 30seconds until the water adjusts to ambient temperature)

2. Hold towards light source & look into the eyepiece, if the boundary line between the upper blue field & the lower white field is not located exactly on the 0°C waterline, adjust the correcting screw until both lines meet.

3. Wipe the water from the prism with clean dry cloth & replace the rubber correcting screw cover.

NOTE: under normal operating conditions the calibration only needs to be checked periodically

Maintenance

1. If the ambient temperature is not within the automatic temperature compensation range (10 – 30°C) the instrument must be calibrated before testing commences.

2. The prism must be cleaned thoroughly with a soft, clean damp cloth after each use – failure to do so will result in inaccurate readings & possible long term damage

3. The instrument must be kept in a dry clean environment to prevent condensation forming on the optical components

4. If used in accordance with the instructions & all warning are followed – the optical performance will remain constant & the instrument will give many years of reliable service.

The post REED R9600 Salinity Refractometer, 0-28% appeared first on rapid-tech.

• Brix% is calibrated to the number of grams of cane sugar contained in 100g of cane sugar solution
• When measuring a sugar solution, the Brix% should perfectly match the actual concentration
• With solutions of other components, a conversion chart is required
• Features automatic temperature compensation

BRIX measurement is a well known application in the food and beverage industry. Strictly speaking the BRIX measurement is the determination of pure sucrose content in water (1 degree Brix = 1g of sucrose in 100g of solution), but the BRIX measurement is used in many other applications (soft drinks, fruit juices, tomato concentrates, etc..) which are very often far away from pure sucrose/water solutions. This has been leading to some confusions, especially when comparing results obtained with different measuring techniques (hydrometer, pycnometer, refractometer, digital density meter).

Different sample types

When measuring samples other than pure sucrose content in water different results will be obtained when using different techniques (hydrometer, pycnometer, refractometer, digital density meter).

Brix measurement

BRIX measurement can be done by refractive index as well as by density. When measuring pure sucrose content in water, both techniques will give the same result. Density and refractive index are strongly temperature dependent, but as this dependency is controlled in the corresponding instrument. Two types of instruments can be used, portable or benchtop instruments. The benchtop instruments offer built-in temperature control (Peltier) and higher accuracy than portable instruments.

Brix is a scale based on the amount that light bends when it passes through a liquid. If one were to place one’s hand in a pond and measure the amount it appeared to bend, and then place it in the ocean, it would appear to bend a different amount. That differential light bending is the best tool currently available to consumers to determine the value of crops that are purchased or produced. The Bric Chart is the scale that anyone can use to determine poor, average, good or excellent in a foodstuff.

The post REED MT-090 Refractometer, 58-90% BRIX appeared first on rapid-tech.

• The REED R9500 Brix Refractometer shows the concentration percentage of the soluble solids content (total solids) of a sample (water solution)
• The soluble solids content is the total of all the solids dissolved in the water – beginning with sugar, salts, protein, acids, etc. and the measurement reading value is the value of the sum total of these
• Brix% is calibrated to the number of grams of cane sugar contained in 100g of cane sugar solution (When measuring a sugar solution, the Brix% should perfectly match the actual concentration)

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